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(-) Description

Title :  RE-REFINEMENT OF THE CRYSTAL STRUCTURE OF MUNC18-3 AND SYNTAXIN4 N-PEPTIDE COMPLEX
 
Authors :  S. -H. Hu, M. P. Christie, N. J. Saez, C. F. Latham, R. Jarrott, L. H. L. Lua B. M. Collins, J. L. Martin
Date :  05 Dec 10  (Deposition) - 19 Jan 11  (Release) - 12 Feb 14  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  3.05
Chains :  Asym. Unit :  A,B,C,D
Biol. Unit 1:  A,C  (1x)
Biol. Unit 2:  B,D  (1x)
Keywords :  Membrane Trafficking, Sm Protein, Syntaxin, Snare Proteins, Syntaxin Binding Protein, Endocytosis-Exocytosis Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  S. -H. Hu, M. P. Christie, N. J. Saez, C. F. Latham, R. Jarrott, L. H. L. Lua, B. M. Collins, J. L. Martin
Possible Roles For Munc18-1 Domain 3A And Syntaxin1 N-Peptide And C-Terminal Anchor In Snare Complex Formation
Proc. Natl. Acad. Sci. Usa V. 108 1040 2011
PubMed-ID: 21193638  |  Reference-DOI: 10.1073/PNAS.0914906108
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - SYNTAXIN-BINDING PROTEIN 3
    ChainsA, B
    EngineeredYES
    Expression SystemSPODOPTERA FRUGIPERDA
    Expression System Cell LineSF9
    Expression System CommonFALL ARMYWORM
    Expression System Taxid7108
    Expression System VectorPACHLT-B
    Expression System Vector TypeBACULOVIRUS
    GeneSTXBP3, STXBP3A, UNC18C
    Organism CommonMOUSE
    Organism ScientificMUS MUSCULUS
    Organism Taxid10090
    StrainBALB/C
    SynonymMUNC-18-3, MAMMALIAN HOMOLOG OF UNC-18C, MUNC-18C, PROTEIN UNC-18 HOMOLOG 3, UNC18-3, PROTEIN UNC-18 HOMOLOG C, UNC-18C
 
Molecule 2 - SYNTAXIN-4 N-TERMINAL PEPTIDE
    ChainsC, D
    EngineeredYES
    FragmentUNP RESIDUES 1-10
    Organism CommonMOUSE
    Organism ScientificMUS MUSCULUS
    Organism Taxid10090
    Other DetailsCHEMICALLY SYNTHESIZED PEPTIDE
    SyntheticYES

 Structural Features

(-) Chains, Units

  1234
Asymmetric Unit ABCD
Biological Unit 1 (1x)A C 
Biological Unit 2 (1x) B D

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 3PUK)

(-) Sites  (0, 0)

(no "Site" information available for 3PUK)

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3PUK)

(-) Cis Peptide Bonds  (22, 22)

Asymmetric Unit
No.Residues
1Ser A:125 -Cys A:126
2Ser A:127 -Lys A:128
3Tyr A:271 -Lys A:272
4Lys A:272 -Thr A:273
5Thr A:273 -Asp A:274
6Gly A:275 -Lys A:276
7Lys A:306 -Leu A:307
8Lys A:309 -Glu A:310
9Thr A:314 -Lys A:315
10Lys A:397 -Asn A:398
11Arg A:463 -Ser A:464
12Leu A:524 -Asp A:525
13Arg A:526 -Lys A:527
14Lys A:584 -Asp A:585
15Ser B:97 -Lys B:98
16Glu B:100 -Lys B:101
17Gly B:380 -Gln B:381
18Ile B:432 -Glu B:433
19Ser B:508 -Gly B:509
20Leu B:522 -Glu B:523
21Asp B:525 -Arg B:526
22Arg B:526 -Lys B:527

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3PUK)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 3PUK)

(-) Exons   (0, 0)

(no "Exon" information available for 3PUK)

(-) Sequences/Alignments

Asymmetric Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:552
 aligned with STXB3_MOUSE | Q60770 from UniProtKB/Swiss-Prot  Length:592

    Alignment length:579
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286       296       306       316       326       336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496       506       516       526       536       546       556       566       576         
          STXB3_MOUSE     7 ERGLKSVVWRKIKTAVFDDCRKEGEWKIMLLDEFTTKLLSSCCKMTDLLEEGITVIENIYKNREPVRQMKALYFISPTPKSVDCFLRDFGSKSEKKYKAAYIYFTDFCPDSLFNKIKASCSKSIRRCKEINISFIPQESQVYTLDVPDAFYYCYSPDPSNASRKEVVMEAMAEQIVTVCATLDENPGVRYKSKPLDNASKLAQLVEKKLEDYYKIDEKGLIKGKTQSQLLIIDRGFDPVSTVLHELTFQAMAYDLLPIENDTYKYKTDGKEKEAVLEEDDDLWVRVRHRHIAVVLEEIPKLMKEISSTKKATEGKTSLSALTQLMKKMPHFRKQISKQVVHLNLAEDCMNKFKLNIEKLCKTEQDLALGTDAEGQRVKDSMLVLLPVLLNKNHDNCDKIRAVLLYIFGINGTTEENLDRLIHNVKIEDDSDMIRNWSHLGVPIVPPSQQAKPLRKDRSAEETFQLSRWTPFIKDIMEDAIDNRLDSKEWPYCSRCPAVWNGSGAVSARQKPRTNYLELDRKNGSRLIIFVIGGITYSEMRCAYEVSQAHKSCEVIIGSTHILTPRKLLDDIKMLNKSKD 585
               SCOP domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhh.....eeeeehhhhhhhhhhh...hhhhhh.eeeeee............eeeee..hhhhhhhhhhhhhhhhh.....eeeee....hhhhhhhhhhh....eeeeee....eeeee..eeee...hhhhhhh......hhhhhhhhhhhhhhhhhhhhhhh...eeee.....hhhhhhhhhhhhhhhhh..............eeeeeee.hhh.........hhhhhhhhhh.hhh.eee........eee..............hhhhhhh.............-------...hhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...........hhhhhh........hhhhhhhhhhhhhhhh...hhhhhhhhhhhh.....hhhhhhhhhhh....................hhhhh......hhhhhhhhhh..........--------------------.............eeeeeee..eehhhhhhhhhhhhhh...eeeeee..eehhhhhhhhhh....... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3puk A   7 ERGLKSVVWRKIKTAVFDDCRKEGEWKIMLLDEFTTKLLSSCCKMTDLLEEGITVIENIYKNREPVRQMKALYFISPTPKSVDCFLRDFGSKSEKKYKAAYIYFTDFCPDSLFNKIKASCSKSIRRCKEINISFIPQESQVYTLDVPDAFYYCYSPDPSNASRKEVVMEAMAEQIVTVCATLDENPGVRYKSKPLDNASKLAQLVEKKLEDYYKIDEKGLIKGKTQSQLLIIDRGFDPVSTVLHELTFQAMAYDLLPIENDTYKYKTDGKEKEAVLEEDDDLWVRVRHRHIAVVLEEIPKLMKEISSTK-------SLSALTQLMKKMPHFRKQISKQVVHLNLAEDCMNKFKLNIEKLCKTEQDLALGTDAEGQRVKDSMLVLLPVLLNKNHDNCDKIRAVLLYIFGINGTTEENLDRLIHNVKIEDDSDMIRNWSHLGVPIVPPSQQAKPLRKDRSAEETFQLSRWTPFIKDIMEDAIDNRLDSKEWPY--------------------RTNYLELDRKNGSRLIIFVIGGITYSEMRCAYEVSQAHKSCEVIIGSTHILTPRKLLDDIKMLNKSKD 585
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286       296       306        |-      |326       336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496|        -         - |     526       536       546       556       566       576         
                                                                                                                                                                                                                                                                                                                                              315     323                                                                                                                                                                           497                  518                                                                   

Chain B from PDB  Type:PROTEIN  Length:545
 aligned with STXB3_MOUSE | Q60770 from UniProtKB/Swiss-Prot  Length:592

    Alignment length:579
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266       276       286       296       306       316       326       336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496       506       516       526       536       546       556       566       576         
          STXB3_MOUSE     7 ERGLKSVVWRKIKTAVFDDCRKEGEWKIMLLDEFTTKLLSSCCKMTDLLEEGITVIENIYKNREPVRQMKALYFISPTPKSVDCFLRDFGSKSEKKYKAAYIYFTDFCPDSLFNKIKASCSKSIRRCKEINISFIPQESQVYTLDVPDAFYYCYSPDPSNASRKEVVMEAMAEQIVTVCATLDENPGVRYKSKPLDNASKLAQLVEKKLEDYYKIDEKGLIKGKTQSQLLIIDRGFDPVSTVLHELTFQAMAYDLLPIENDTYKYKTDGKEKEAVLEEDDDLWVRVRHRHIAVVLEEIPKLMKEISSTKKATEGKTSLSALTQLMKKMPHFRKQISKQVVHLNLAEDCMNKFKLNIEKLCKTEQDLALGTDAEGQRVKDSMLVLLPVLLNKNHDNCDKIRAVLLYIFGINGTTEENLDRLIHNVKIEDDSDMIRNWSHLGVPIVPPSQQAKPLRKDRSAEETFQLSRWTPFIKDIMEDAIDNRLDSKEWPYCSRCPAVWNGSGAVSARQKPRTNYLELDRKNGSRLIIFVIGGITYSEMRCAYEVSQAHKSCEVIIGSTHILTPRKLLDDIKMLNKSKD 585
               SCOP domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) -------------------------Sec1-3pukB01 B:32-577                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             -------- Pfam domains (1)
           Pfam domains (2) -------------------------Sec1-3pukB02 B:32-577                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             -------- Pfam domains (2)
         Sec.struct. author ..hhhhhhhhhhhhhh..........eeeeehhhhhhhhhhhh....hhhh.eeeeee............eeeee..hhhhhhhhhh............eeeee....hhhhhhhhhh.....eeeeee.....eeee..eee......hhhhhh.....hhhhhhhhhhhhhhhhhhhhhh....eeee..hhhhhhhhhhhhhhhhhhhhh.............eeeeeehhhhhhhhhh....hhhhhhhhhh.ee..eee...----.eee..............hhhhhh...---------------------hhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...........hhhhhhhhhh....hhhhhhhhhhhhhhh....hhhhhhhhhhhh.....hhhhhhhhhhh..............................hhhhhhhhhhh..............-----.......----.............eeeeee....hhhhhhhhhhhhh.....eeeeee....hhhhhhhhhh....... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3puk B   7 ERGLKSVVWRKIKTAVFDDCRKEGEWKIMLLDEFTTKLLSSCCKMTDLLEEGITVIENIYKNREPVRQMKALYFISPTPKSVDCFLRDFGSKSEKKYKAAYIYFTDFCPDSLFNKIKASCSKSIRRCKEINISFIPQESQVYTLDVPDAFYYCYSPDPSNASRKEVVMEAMAEQIVTVCATLDENPGVRYKSKPLDNASKLAQLVEKKLEDYYKIDEKGLIKGKTQSQLLIIDRGFDPVSTVLHELTFQAMAYDLLPIENDTYKYKT----KEAVLEEDDDLWVRVRHRHIAVVLEEI---------------------ALTQLMKKMPHFRKQISKQVVHLNLAEDCMNKFKLNIEKLCKTEQDLALGTDAEGQRVKDSMLVLLPVLLNKNHDNCDKIRAVLLYIFGINGTTEENLDRLIHNVKIEDDSDMIRNWSHLGVPIVPPSQQAKPLRKDRSAEETFQLSRWTPFIKDIMEDAIDNRLDSKEWPYCSRC-----GSGAVSA----RTNYLELDRKNGSRLIIFVIGGITYSEMRCAYEVSQAHKSCEVIIGSTHILTPRKLLDDIKMLNKSKD 585
                                    16        26        36        46        56        66        76        86        96       106       116       126       136       146       156       166       176       186       196       206       216       226       236       246       256       266      |  - |     286       296       | -         -       326       336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496    |    -|     |  - |     526       536       546       556       566       576         
                                                                                                                                                                                                                                                                                                    273  278                       304                   326                                                                                                                                                                            501   507   513  518                                                                   

Chain C from PDB  Type:PROTEIN  Length:9
 aligned with STX4_MOUSE | P70452 from UniProtKB/Swiss-Prot  Length:298

    Alignment length:9
           STX4_MOUSE     1 MRDRTHELR   9
               SCOP domains --------- SCOP domains
               CATH domains --------- CATH domains
               Pfam domains --------- Pfam domains
         Sec.struct. author ...hhhhhh Sec.struct. author
                 SAPs(SNPs) --------- SAPs(SNPs)
                    PROSITE --------- PROSITE
                 Transcript --------- Transcript
                 3puk C   1 MRDRTHELR   9

Chain D from PDB  Type:PROTEIN  Length:10
 aligned with STX4_MOUSE | P70452 from UniProtKB/Swiss-Prot  Length:298

    Alignment length:10
                                    10
           STX4_MOUSE     1 MRDRTHELRQ  10
               SCOP domains ---------- SCOP domains
               CATH domains ---------- CATH domains
               Pfam domains ---------- Pfam domains
         Sec.struct. author ...hhhhhh. Sec.struct. author
                 SAPs(SNPs) ---------- SAPs(SNPs)
                    PROSITE ---------- PROSITE
                 Transcript ---------- Transcript
                 3puk D   1 MRDRTHELRQ  10
                                    10

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (0, 0)

(no "SCOP Domain" information available for 3PUK)

(-) CATH Domains  (0, 0 ; only for superseded entry 2PJX: 3,6)

(no "CATH Domain" information available for 3PUK, only for superseded entry 2PJX replaced by 3PUK)

(-) Pfam Domains  (1, 2)

Asymmetric Unit

(-) Gene Ontology  (70, 81)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (STXB3_MOUSE | Q60770)
molecular function
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0019905    syntaxin binding    Interacting selectively and non-covalently with a syntaxin, a SNAP receptor involved in the docking of synaptic vesicles at the presynaptic zone of a synapse.
    GO:0017075    syntaxin-1 binding    Interacting selectively and non-covalently with the SNAP receptor syntaxin-1.
biological process
    GO:0007420    brain development    The process whose specific outcome is the progression of the brain over time, from its formation to the mature structure. Brain development begins with patterning events in the neural tube and ends with the mature structure that is the center of thought and emotion. The brain is responsible for the coordination and control of bodily activities and the interpretation of information from the senses (sight, hearing, smell, etc.).
    GO:0006887    exocytosis    A process of secretion by a cell that results in the release of intracellular molecules (e.g. hormones, matrix proteins) contained within a membrane-bounded vesicle. Exocytosis can occur either by full fusion, when the vesicle collapses into the plasma membrane, or by a kiss-and-run mechanism that involves the formation of a transient contact, a pore, between a granule (for exemple of chromaffin cells) and the plasma membrane. The latter process most of the time leads to only partial secretion of the granule content. Exocytosis begins with steps that prepare vesicles for fusion with the membrane (tethering and docking) and ends when molecules are secreted from the cell.
    GO:0015758    glucose transport    The directed movement of the hexose monosaccharide glucose into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0030073    insulin secretion    The regulated release of proinsulin from secretory granules (B granules) in the B cells of the pancreas; accompanied by cleavage of proinsulin to form mature insulin.
    GO:0061024    membrane organization    A process which results in the assembly, arrangement of constituent parts, or disassembly of a membrane. A membrane is a double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins.
    GO:0045955    negative regulation of calcium ion-dependent exocytosis    Any process that stops, prevents, or reduces the frequency, rate or extent of calcium ion-dependent exocytosis.
    GO:0043312    neutrophil degranulation    The regulated exocytosis of secretory granules containing preformed mediators such as proteases, lipases, and inflammatory mediators by a neutrophil.
    GO:0070527    platelet aggregation    The adhesion of one platelet to one or more other platelets via adhesion molecules.
    GO:0051291    protein heterooligomerization    The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of component monomers that are not all identical. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
    GO:0022615    protein to membrane docking    The initial attachment of a protein to a target membrane, mediated by a proteins protruding from the target membrane. Docking requires only that the proteins come close enough to interact and adhere.
    GO:0015031    protein transport    The directed movement of proteins into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0032868    response to insulin    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an insulin stimulus. Insulin is a polypeptide hormone produced by the islets of Langerhans of the pancreas in mammals, and by the homologous organs of other organisms.
    GO:0006810    transport    The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
    GO:0006904    vesicle docking involved in exocytosis    The initial attachment of a vesicle membrane to a target membrane, mediated by proteins protruding from the membrane of the vesicle and the target membrane, that contributes to exocytosis.
    GO:0016192    vesicle-mediated transport    A cellular transport process in which transported substances are moved in membrane-bounded vesicles; transported substances are enclosed in the vesicle lumen or located in the vesicle membrane. The process begins with a step that directs a substance to the forming vesicle, and includes vesicle budding and coating. Vesicles are then targeted to, and fuse with, an acceptor membrane.
cellular component
    GO:0016324    apical plasma membrane    The region of the plasma membrane located at the apical end of the cell.
    GO:0016323    basolateral plasma membrane    The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
    GO:0031091    platelet alpha granule    A secretory organelle found in blood platelets, which is unique in that it exhibits further compartmentalization and acquires its protein content via two distinct mechanisms: (1) biosynthesis predominantly at the megakaryocyte (MK) level (with some vestigial platelet synthesis) (e.g. platelet factor 4) and (2) endocytosis and pinocytosis at both the MK and circulating platelet levels (e.g. fibrinogen (Fg) and IgG).
    GO:0042581    specific granule    Granule with a membranous, tubular internal structure, found primarily in mature neutrophil cells. Most are released into the extracellular fluid. Specific granules contain lactoferrin, lysozyme, vitamin B12 binding protein and elastase.
    GO:0070820    tertiary granule    A secretory granule that contains cathepsin and gelatinase and is readily exocytosed upon cell activation; found primarily in mature neutrophil cells.

Chain C,D   (STX4_MOUSE | P70452)
molecular function
    GO:0005484    SNAP receptor activity    Acting as a marker to identify a membrane and interacting selectively with one or more SNAREs on another membrane to mediate membrane fusion.
    GO:0000149    SNARE binding    Interacting selectively and non-covalently with a SNARE (soluble N-ethylmaleimide-sensitive factor attached protein receptor) protein.
    GO:0017022    myosin binding    Interacting selectively and non-covalently with any part of a myosin complex; myosins are any of a superfamily of molecular motor proteins that bind to actin and use the energy of ATP hydrolysis to generate force and movement along actin filaments.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0016230    sphingomyelin phosphodiesterase activator activity    Increases the activity of the enzyme sphingomyelin phosphodiesterase.
biological process
    GO:0035493    SNARE complex assembly    The aggregation, arrangement and bonding together of a set of components to form a SNARE complex, a protein complex involved in membrane fusion; a stable ternary complex consisting of a four-helix bundle, usually formed from one R-SNARE and three Q-SNAREs with an ionic layer sandwiched between hydrophobic layers.
    GO:0006886    intracellular protein transport    The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell.
    GO:0060291    long-term synaptic potentiation    A process that modulates synaptic plasticity such that synapses are changed resulting in the increase in the rate, or frequency of synaptic transmission at the synapse.
    GO:0061024    membrane organization    A process which results in the assembly, arrangement of constituent parts, or disassembly of a membrane. A membrane is a double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins.
    GO:0006836    neurotransmitter transport    The directed movement of a neurotransmitter into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Neurotransmitters are any chemical substance that is capable of transmitting (or inhibiting the transmission of) a nerve impulse from a neuron to another cell.
    GO:0048284    organelle fusion    The creation of a single organelle from two or more organelles.
    GO:0043085    positive regulation of catalytic activity    Any process that activates or increases the activity of an enzyme.
    GO:0045785    positive regulation of cell adhesion    Any process that activates or increases the frequency, rate or extent of cell adhesion.
    GO:0030335    positive regulation of cell migration    Any process that activates or increases the frequency, rate or extent of cell migration.
    GO:0008284    positive regulation of cell proliferation    Any process that activates or increases the rate or extent of cell proliferation.
    GO:0050921    positive regulation of chemotaxis    Any process that activates or increases the frequency, rate or extent of the directed movement of a motile cell or organism in response to a specific chemical concentration gradient.
    GO:0043311    positive regulation of eosinophil degranulation    Any process that activates or increases the frequency, rate or extent of eosinophil degranulation.
    GO:0090004    positive regulation of establishment of protein localization to plasma membrane    Any process that increases the frequency, rate or extent of the directed movement of a protein to a specific location in the plasma membrane.
    GO:0051024    positive regulation of immunoglobulin secretion    Any process that activates or increases the frequency, rate or extent of the regulated release of immunoglobulins from a cell.
    GO:0035774    positive regulation of insulin secretion involved in cellular response to glucose stimulus    Any process that increases the frequency, rate or extent of the regulated release of insulin that contributes to the response of a cell to glucose.
    GO:2000010    positive regulation of protein localization to cell surface    Any process that activates or increases the frequency, rate or extent of protein localization to the cell surface.
    GO:1903078    positive regulation of protein localization to plasma membrane    Any process that activates or increases the frequency, rate or extent of protein localization to plasma membrane.
    GO:0017157    regulation of exocytosis    Any process that modulates the frequency, rate or extent of exocytosis.
    GO:1902041    regulation of extrinsic apoptotic signaling pathway via death domain receptors    Any process that modulates the frequency, rate or extent of extrinsic apoptotic signaling pathway via death domain receptors.
    GO:0033194    response to hydroperoxide    Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a hydroperoxide stimulus. Hydroperoxides are monosubstitution products of hydrogen peroxide, HOOH.
    GO:0016079    synaptic vesicle exocytosis    Fusion of intracellular membrane-bounded vesicles with the pre-synaptic membrane of the neuronal cell resulting in release of neurotransmitter into the synaptic cleft.
    GO:0031629    synaptic vesicle fusion to presynaptic active zone membrane    Fusion of the membrane of a synaptic vesicle with the presynaptic active zone membrane, thereby releasing its cargo neurotransmitters into the synaptic cleft.
    GO:0006810    transport    The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
    GO:0048278    vesicle docking    The initial attachment of a transport vesicle membrane to the target membrane, mediated by proteins protruding from the membrane of the vesicle and the target membrane. Docking requires only that the two membranes come close enough for these proteins to interact and adhere.
    GO:0016192    vesicle-mediated transport    A cellular transport process in which transported substances are moved in membrane-bounded vesicles; transported substances are enclosed in the vesicle lumen or located in the vesicle membrane. The process begins with a step that directs a substance to the forming vesicle, and includes vesicle budding and coating. Vesicles are then targeted to, and fuse with, an acceptor membrane.
cellular component
    GO:0031201    SNARE complex    A protein complex involved in membrane fusion; a stable ternary complex consisting of a four-helix bundle, usually formed from one R-SNARE and three Q-SNAREs with an ionic layer sandwiched between hydrophobic layers. One well-characterized example is the neuronal SNARE complex formed of synaptobrevin 2, syntaxin 1a, and SNAP-25.
    GO:0016323    basolateral plasma membrane    The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis.
    GO:0009986    cell surface    The external part of the cell wall and/or plasma membrane.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
    GO:0043197    dendritic spine    A small, membranous protrusion from a dendrite that forms a postsynaptic compartment - typically receiving input from a single presynapse. They function as partially isolated biochemical and an electrical compartments. Spine morphology is variable including "thin", "stubby", "mushroom", and "branched", with a continuum of intermediate morphologies. They typically terminate in a bulb shape, linked to the dendritic shaft by a restriction. Spine remodeling is though to be involved in synaptic plasticity.
    GO:0005768    endosome    A vacuole to which materials ingested by endocytosis are delivered.
    GO:0070062    extracellular exosome    A vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.
    GO:0005615    extracellular space    That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.
    GO:0016021    integral component of membrane    The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0005622    intracellular    The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.
    GO:0030027    lamellipodium    A thin sheetlike process extended by the leading edge of a migrating cell or extending cell process; contains a dense meshwork of actin filaments.
    GO:0043219    lateral loop    Non-compact myelin located adjacent to the nodes of Ranvier in a myelin segment. These non-compact regions include cytoplasm from the cell responsible for synthesizing the myelin. Lateral loops are found in the paranodal region adjacent to the nodes of Ranvier, while Schmidt-Lantermann clefts are analogous structures found within the compact myelin internode.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0035749    myelin sheath adaxonal region    The region of the myelin sheath nearest to the axon.
    GO:0048471    perinuclear region of cytoplasm    Cytoplasm situated near, or occurring around, the nucleus.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
    GO:0036477    somatodendritic compartment    The region of a neuron that includes the cell body (cell soma) and the dendrite, but excludes the axon.
    GO:0042581    specific granule    Granule with a membranous, tubular internal structure, found primarily in mature neutrophil cells. Most are released into the extracellular fluid. Specific granules contain lactoferrin, lysozyme, vitamin B12 binding protein and elastase.
    GO:0000322    storage vacuole    A vacuole that functions primarily in the storage of materials, including nutrients, pigments, waste products, and small molecules.
    GO:0045202    synapse    The junction between a nerve fiber of one neuron and another neuron, muscle fiber or glial cell. As the nerve fiber approaches the synapse it enlarges into a specialized structure, the presynaptic nerve ending, which contains mitochondria and synaptic vesicles. At the tip of the nerve ending is the presynaptic membrane; facing it, and separated from it by a minute cleft (the synaptic cleft) is a specialized area of membrane on the receiving cell, known as the postsynaptic membrane. In response to the arrival of nerve impulses, the presynaptic nerve ending secretes molecules of neurotransmitters into the synaptic cleft. These diffuse across the cleft and transmit the signal to the postsynaptic membrane.
    GO:0008021    synaptic vesicle    A secretory organelle, typically 50 nm in diameter, of presynaptic nerve terminals; accumulates in high concentrations of neurotransmitters and secretes these into the synaptic cleft by fusion with the 'active zone' of the presynaptic plasma membrane.
    GO:0005802    trans-Golgi network    The network of interconnected tubular and cisternal structures located within the Golgi apparatus on the side distal to the endoplasmic reticulum, from which secretory vesicles emerge. The trans-Golgi network is important in the later stages of protein secretion where it is thought to play a key role in the sorting and targeting of secreted proteins to the correct destination.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

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        STX4_MOUSE | P704523puj

(-) Related Entries Specified in the PDB File

2pjx THE SAME STRUCTURE WAS RE-REFINED IN THE NEW ENTRY
3puj