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(-) Description

Title :  CRYSTAL STRUCTURE ANALYSIS OF HUMAN SYNAPTOTAGMIN 1 C2A-C2B
 
Authors :  R. B. Sutton, K. L Fuson, M. Montes, J. J Robert
Date :  10 Sep 07  (Deposition) - 12 Feb 08  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.70
Chains :  Asym./Biol. Unit :  A,B
Keywords :  C2A-C2B, Exocytosis, Calcium, Cell Junction, Cytoplasmic Vesicle, Glycoprotein, Lipoprotein, Membrane, Metal-Binding, Palmitate, Phosphorylation, Synapse, Transmembrane, Endocytosis/Exocytosis Complex, Endocytosis (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  K. L. Fuson, M. Montes, J. J. Robert, R. B. Sutton
Structure Of Human Synaptotagmin 1 C2Ab In The Absence Of Ca2+ Reveals A Novel Domain Association.
Biochemistry V. 46 13041 2007
PubMed-ID: 17956130  |  Reference-DOI: 10.1021/BI701651K
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - SYNAPTOTAGMIN-1
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI BL21(DE3)
    Expression System Plasmid: PGEX-4T
    Expression System Strain: BL21(DE3)
    Expression System Taxid: 469008
    Expression System Vector Type: PLASMID
    Fragment: C2A-C2B
    Gene: SYT1, SVP65, SYT
    Organism Common: HUMAN
    Organism Scientific: HOMO SAPIENS
    Organism Taxid: 9606
    Synonym: SYNAPTOTAGMIN I, SYTI, P65

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 8)

Asymmetric/Biological Unit (1, 8)
No.NameCountTypeFull Name
1CL8Ligand/IonCHLORIDE ION

(-) Sites  (8, 8)

Asymmetric Unit (8, 8)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREPHE A:234 , TRP A:404 , GLY B:221 , ASN B:248BINDING SITE FOR RESIDUE CL A 101
2AC2SOFTWAREGLY A:221 , ASN A:248 , TRP B:404BINDING SITE FOR RESIDUE CL A 102
3AC3SOFTWAREASN A:207 , GLN A:209 , HOH B:435BINDING SITE FOR RESIDUE CL A 103
4AC4SOFTWARELEU A:202 , ASN A:203BINDING SITE FOR RESIDUE CL A 104
5AC5SOFTWAREHIS A:198 , VAL A:205BINDING SITE FOR RESIDUE CL A 105
6AC6SOFTWAREARG A:260 , ASP A:261BINDING SITE FOR RESIDUE CL A 108
7AC7SOFTWAREHIS B:198 , VAL B:205BINDING SITE FOR RESIDUE CL B 106
8AC8SOFTWAREHOH A:440 , ASN B:207 , GLN B:209BINDING SITE FOR RESIDUE CL B 107

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2R83)

(-) Cis Peptide Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1Leu A:186 -Pro A:187
2Leu B:186 -Pro B:187

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (1, 2)

Asymmetric/Biological Unit (1, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_072911I368TSYT1_HUMANDisease  ---A/BI367T
  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (1, 4)

Asymmetric/Biological Unit (1, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1C2PS50004 C2 domain profile.SYT1_HUMAN157-245
 
287-378
 		  4A:156-244
B:156-244
A:286-377
B:286-377

(-) Exons   (6, 12)

Asymmetric/Biological Unit (6, 12)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1ENST000003932401ENSE00001514587chr12:79257773-79258115343SYT1_HUMAN-00--
1.2bENST000003932402bENSE00001514586chr12:79258778-79258889112SYT1_HUMAN-00--
1.3ENST000003932403ENSE00001411176chr12:79371579-79371711133SYT1_HUMAN-00--
1.6ENST000003932406ENSE00001399568chr12:79441077-7944114266SYT1_HUMAN-00--
1.7ENST000003932407ENSE00001164727chr12:79611283-79611465183SYT1_HUMAN1-56560--
1.8ENST000003932408ENSE00001098488chr12:79679567-79679751185SYT1_HUMAN56-117620--
1.9ENST000003932409ENSE00001272133chr12:79685788-79685910123SYT1_HUMAN118-158412A:140-157
B:140-157		18
18
1.10bENST0000039324010bENSE00001272119chr12:79689849-79690016168SYT1_HUMAN159-214562A:158-213
B:158-213		56
56
1.11ENST0000039324011ENSE00000910597chr12:79693164-79693331168SYT1_HUMAN215-270562A:214-269
B:214-269		56
56
1.12ENST0000039324012ENSE00001620152chr12:79747282-79747399118SYT1_HUMAN271-310402A:270-309
B:270-309		40
40
1.13ENST0000039324013ENSE00001657879chr12:79837853-79837986134SYT1_HUMAN310-354452A:309-353
B:309-353		45
45
1.14aENST0000039324014aENSE00001824637chr12:79842698-798440591362SYT1_HUMAN355-422682A:354-418
B:354-418		65
65

(-) Sequences/Alignments

Asymmetric/Biological 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:279
 aligned with SYT1_HUMAN | P21579 from UniProtKB/Swiss-Prot  Length:422

    Alignment length:279
                                   150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410         
           SYT1_HUMAN   141 EKLGKLQYSLDYDFQNNQLLVGIIQAAELPALDMGGTSDPYVKVFLLPDKKKKFETKVHRKTLNPVFNEQFTFKVPYSELGGKTLVMAVYDFDRFSKHDIIGEFKVPMNTVDFGHVTEEWRDLQSAEKEEQEKLGDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKNTLNPYYNESFSFEVPFEQIQKVQVVVTVLDYDKIGKNDAIGKVFVGYNSTGAELRHWSDMLANPRRPIAQWHTLQVEEEVDAMLA 419
               SCOP domains d2r83a2 A:140-267 Synaptogamin I                                                                                                d2r83a1 A:268-418 Synaptogamin I                                                                                                                        SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....eeeeeeeee....eeeeeeeeee............eeeeeeee......ee..........eeeeeeee..hhhhh...eeeeeeee........eeeeeeee.hhh.....eeeeee.............eeeeeeeee....eeeeeeeeee............eeeeeeeee..eeeeeee..........eeeeeeeee....hhh.eeeeeeeee........eeeeeeee...hhhhhhhhhhhhhh....eeeeee..hhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------T--------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------C2  PDB: A:156-244 UniProt: 157-245                                                      -----------------------------------------C2  PDB: A:286-377 UniProt: 287-378                                                         ----------------------------------------- PROSITE
           Transcript 1 (1) Exon 1.9          Exon 1.10b  PDB: A:158-213 UniProt: 159-214             Exon 1.11  PDB: A:214-269 UniProt: 215-270              Exon 1.12  PDB: A:270-309               --------------------------------------------Exon 1.14a  PDB: A:354-418 UniProt: 355-422 [INCOMPLETE]          Transcript 1 (1)
           Transcript 1 (2) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.13  PDB: A:309-353 UniProt: 310-354   ----------------------------------------------------------------- Transcript 1 (2)
                 2r83 A 140 EKLGKLQYSLDYDFQNNQLLVGIIQAAELPALDMGGTSDPYVKVFLLPDKKKKFETKVHRKTLNPVFNEQFTFKVPYSELAGKTLVMAVYDFDRFSKHDIIGEFKVPMNTVDFGHVTEEWRDLQSAEKEEQEKLGDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKNTLNPYYNESFSFEVPFEQIQKVQVVVTVLDYDKIGKNDAIGKVFVGYNSTGAELRHWSDMLANPRRPIAQWHTLQVEEEVDAMLA 418
                                   149       159       169       179       189       199       209       219       229       239       249       259       269       279       289       299       309       319       329       339       349       359       369       379       389       399       409         


Chain B from PDB  Type:PROTEIN  Length:279
 aligned with SYT1_HUMAN | P21579 from UniProtKB/Swiss-Prot  Length:422

    Alignment length:279
                                   150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410         
           SYT1_HUMAN   141 EKLGKLQYSLDYDFQNNQLLVGIIQAAELPALDMGGTSDPYVKVFLLPDKKKKFETKVHRKTLNPVFNEQFTFKVPYSELGGKTLVMAVYDFDRFSKHDIIGEFKVPMNTVDFGHVTEEWRDLQSAEKEEQEKLGDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKNTLNPYYNESFSFEVPFEQIQKVQVVVTVLDYDKIGKNDAIGKVFVGYNSTGAELRHWSDMLANPRRPIAQWHTLQVEEEVDAMLA 419
               SCOP domains d2r83b2 B:140-267 Synaptogamin I                                                                                                d2r83b1 B:268-418 Synaptogamin I                                                                                                                        SCOP domains
               CATH domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
           Pfam domains (1) -----------------------------------------------------------------------------------------------------------------------------------------------------C2-2r83B01 B:289-377                                                                     ----------------------------------------- Pfam domains (1)
           Pfam domains (2) -----------------------------------------------------------------------------------------------------------------------------------------------------C2-2r83B02 B:289-377                                                                     ----------------------------------------- Pfam domains (2)
           Pfam domains (3) -----------------------------------------------------------------------------------------------------------------------------------------------------C2-2r83B03 B:289-377                                                                     ----------------------------------------- Pfam domains (3)
           Pfam domains (4) -----------------------------------------------------------------------------------------------------------------------------------------------------C2-2r83B04 B:289-377                                                                     ----------------------------------------- Pfam domains (4)
         Sec.struct. author ....eeeeeeeee....eeeeeeeeee............eeeeeeee......ee..........eeeeeeee..hhhhh...eeeeeeee........eeeeeeee.hhh.....eeeeee.............eeeeeeeee....eeeeeeeeee............eeeeeeeee..eeeeeee..........eeeeeeeee....hhh.eeeeeeeee........eeeeeeee...hhhhhhhhhhhhhh....eeeeee..hhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------T--------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------C2  PDB: B:156-244 UniProt: 157-245                                                      -----------------------------------------C2  PDB: B:286-377 UniProt: 287-378                                                         ----------------------------------------- PROSITE
           Transcript 1 (1) Exon 1.9          Exon 1.10b  PDB: B:158-213 UniProt: 159-214             Exon 1.11  PDB: B:214-269 UniProt: 215-270              Exon 1.12  PDB: B:270-309               --------------------------------------------Exon 1.14a  PDB: B:354-418 UniProt: 355-422 [INCOMPLETE]          Transcript 1 (1)
           Transcript 1 (2) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------Exon 1.13  PDB: B:309-353 UniProt: 310-354   ----------------------------------------------------------------- Transcript 1 (2)
                 2r83 B 140 EKLGKLQYSLDYDFQNNQLLVGIIQAAELPALDMGGTSDPYVKVFLLPDKKKKFETKVHRKTLNPVFNEQFTFKVPYSELAGKTLVMAVYDFDRFSKHDIIGEFKVPMNTVDFGHVTEEWRDLQSAEKEEQEKLGDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKNTLNPYYNESFSFEVPFEQIQKVQVVVTVLDYDKIGKNDAIGKVFVGYNSTGAELRHWSDMLANPRRPIAQWHTLQVEEEVDAMLA 418
                                   149       159       169       179       189       199       209       219       229       239       249       259       269       279       289       299       309       319       329       339       349       359       369       379       389       399       409
   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  (1, 4)

Asymmetric/Biological Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2R83)

(-) Pfam Domains  (1, 4)

Asymmetric/Biological Unit
(-)
Clan: C2 (71)
(-)
Family: C2 (34)
(-)
Homo sapiens (Human) (15)
1aC2-2r83B01B:289-377
1bC2-2r83B02B:289-377
1cC2-2r83B03B:289-377
1dC2-2r83B04B:289-377

(-) Gene Ontology  (65, 65)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (SYT1_HUMAN | P21579)
molecular function
    GO:0005545    1-phosphatidylinositol binding    Interacting selectively and non-covalently with phosphatidylinositol, any glycophospholipid with its sn-glycerol 3-phosphate residue is esterified to the 1-hydroxyl group of 1D-myo-inositol.
    GO:0000149    SNARE binding    Interacting selectively and non-covalently with a SNARE (soluble N-ethylmaleimide-sensitive factor attached protein receptor) protein.
    GO:0005509    calcium ion binding    Interacting selectively and non-covalently with calcium ions (Ca2+).
    GO:0005544    calcium-dependent phospholipid binding    Interacting selectively and non-covalently with phospholipids, a class of lipids containing phosphoric acid as a mono- or diester, in the presence of calcium.
    GO:0048306    calcium-dependent 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), in the presence of calcium.
    GO:0005516    calmodulin binding    Interacting selectively and non-covalently with calmodulin, a calcium-binding protein with many roles, both in the calcium-bound and calcium-free states.
    GO:0030276    clathrin binding    Interacting selectively and non-covalently with a clathrin heavy or light chain, the main components of the coat of coated vesicles and coated pits, and which also occurs in synaptic vesicles.
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0050750    low-density lipoprotein particle receptor binding    Interacting selectively and non-covalently with a low-density lipoprotein receptor.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0005546    phosphatidylinositol-4,5-bisphosphate binding    Interacting selectively and non-covalently with phosphatidylinositol-4,5-bisphosphate, a derivative of phosphatidylinositol in which the inositol ring is phosphorylated at the 4' and 5' positions.
    GO:0001786    phosphatidylserine binding    Interacting selectively and non-covalently with phosphatidylserine, a class of glycophospholipids in which a phosphatidyl group is esterified to the hydroxyl group of L-serine.
    GO:0005543    phospholipid binding    Interacting selectively and non-covalently with phospholipids, a class of lipids containing phosphoric acid as a mono- or diester.
    GO:0008022    protein C-terminus binding    Interacting selectively and non-covalently with a protein C-terminus, the end of any peptide chain at which the 1-carboxy function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.
    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:0048791    calcium ion-regulated exocytosis of neurotransmitter    The release of a neurotransmitter into the synaptic cleft by exocytosis of synaptic vesicles, where the release step is dependent on a rise in cytosolic calcium ion levels.
    GO:0030154    cell differentiation    The process in which relatively unspecialized cells, e.g. embryonic or regenerative cells, acquire specialized structural and/or functional features that characterize the cells, tissues, or organs of the mature organism or some other relatively stable phase of the organism's life history. Differentiation includes the processes involved in commitment of a cell to a specific fate and its subsequent development to the mature state.
    GO:0071277    cellular response to calcium ion    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a calcium ion stimulus.
    GO:0007268    chemical synaptic transmission    The vesicular release of classical neurotransmitter molecules from a presynapse, across a chemical synapse, the subsequent activation of neurotransmitter receptors at the postsynapse of a target cell (neuron, muscle, or secretory cell) and the effects of this activation on the postsynaptic membrane potential and ionic composition of the postsynaptic cytosol. This process encompasses both spontaneous and evoked release of neurotransmitter and all parts of synaptic vesicle exocytosis. Evoked transmission starts with the arrival of an action potential at the presynapse.
    GO:0005513    detection of calcium ion    The series of events in which a calcium ion stimulus is received by a cell and converted into a molecular signal.
    GO:0098746    fast, calcium ion-dependent exocytosis of neurotransmitter    The fast, initial phase of calcium ion-induced neurotransmitter release, via exocytosis, into the synaptic cleft. This depends on low affinity calcium sensors and typically begins a fraction of a millisecond after Ca2+ influx, and decays rapidly (1-10ms) with a decay constant of around 5-10ms. The underlying molecular mechanisms of this process are distinct from those of the later, slow phase of release.
    GO:0014047    glutamate secretion    The controlled release of glutamate by a cell. The glutamate is the most abundant excitatory neurotransmitter in the nervous system.
    GO:0007269    neurotransmitter secretion    The regulated release of neurotransmitter from the presynapse into the synaptic cleft via calcium regualated exocytosis during synaptic transmission.
    GO:0045956    positive regulation of calcium ion-dependent exocytosis    Any process that activates or increases the frequency, rate or extent of calcium ion-dependent exocytosis.
    GO:1903861    positive regulation of dendrite extension    Any process that activates or increases the frequency, rate or extent of dendrite extension.
    GO:0050806    positive regulation of synaptic transmission    Any process that activates or increases the frequency, rate or extent of synaptic transmission, the process of communication from a neuron to a target (neuron, muscle, or secretory cell) across a synapse.
    GO:0031340    positive regulation of vesicle fusion    Any process that activates or increases the frequency, rate or extent of vesicle fusion.
    GO:0051260    protein homooligomerization    The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of identical component monomers. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.
    GO:0017158    regulation of calcium ion-dependent exocytosis    Any process that modulates the frequency, rate or extent of calcium ion-dependent exocytosis.
    GO:0017157    regulation of exocytosis    Any process that modulates the frequency, rate or extent of exocytosis.
    GO:1903305    regulation of regulated secretory pathway    Any process that modulates the frequency, rate or extent of regulated secretory pathway.
    GO:0051966    regulation of synaptic transmission, glutamatergic    Any process that modulates the frequency, rate or extent of glutamatergic synaptic transmission, the process of communication from a neuron to another neuron across a synapse using the neurotransmitter glutamate.
    GO:0051592    response to calcium ion    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 calcium ion stimulus.
    GO:0048488    synaptic vesicle endocytosis    Clathrin-mediated endocytosis of presynaptic membrane that recycles synaptic vesicle membrane and its components following synaptic vesicle exocytosis. This process starts with coating of the membrane with adaptor proteins and clathrin prior to invagination and ends when uncoating has finished.
    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: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:0006906    vesicle fusion    Fusion of the membrane of a transport vesicle with its target membrane.
cellular component
    GO:0005794    Golgi apparatus    A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.
    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:0030054    cell junction    A cellular component that forms a specialized region of connection between two or more cells or between a cell and the extracellular matrix. At a cell junction, anchoring proteins extend through the plasma membrane to link cytoskeletal proteins in one cell to cytoskeletal proteins in neighboring cells or to proteins in the extracellular matrix.
    GO:0042584    chromaffin granule membrane    The lipid bilayer surrounding a chromaffin granule, a specialized secretory vesicle found in the cells of adrenal glands and various other organs, which is concerned with the synthesis, storage, metabolism, and secretion of epinephrine and norepinephrine.
    GO:0060201    clathrin-sculpted acetylcholine transport vesicle membrane    The lipid bilayer surrounding a clathrin-sculpted acetylcholine transport vesicle.
    GO:0061202    clathrin-sculpted gamma-aminobutyric acid transport vesicle membrane    The lipid bilayer surrounding a clathrin-sculpted gamma-aminobutyric acid transport vesicle.
    GO:0060203    clathrin-sculpted glutamate transport vesicle membrane    The lipid bilayer surrounding a clathrin-sculpted glutamate transport vesicle.
    GO:0070083    clathrin-sculpted monoamine transport vesicle membrane    The lipid bilayer surrounding a clathrin-sculpted monoamine transport vesicle.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0031410    cytoplasmic vesicle    A vesicle found in the cytoplasm of a cell.
    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:0031045    dense core granule    Electron-dense organelle with a granular internal matrix; contains proteins destined to be secreted.
    GO:0060076    excitatory synapse    A synapse in which an action potential in the presynaptic cell increases the probability of an action potential occurring in the postsynaptic cell.
    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:0043229    intracellular organelle    Organized structure of distinctive morphology and function, occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, vesicles, ribosomes and the cytoskeleton. Excludes the plasma membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0043005    neuron projection    A prolongation or process extending from a nerve cell, e.g. an axon or dendrite.
    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:0042734    presynaptic membrane    A specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon plasma membrane.
    GO:0030141    secretory granule    A small subcellular vesicle, surrounded by a membrane, that is formed from the Golgi apparatus and contains a highly concentrated protein destined for secretion. Secretory granules move towards the periphery of the cell and upon stimulation, their membranes fuse with the cell membrane, and their protein load is exteriorized. Processing of the contained protein may take place in secretory granules.
    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:0030672    synaptic vesicle membrane    The lipid bilayer surrounding a synaptic vesicle.
    GO:0043195    terminal bouton    Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal bouton is a specialized region of it.
    GO:0030658    transport vesicle membrane    The lipid bilayer surrounding a transport vesicle.

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        SYT1_HUMAN | P21579: 2k45 2k4a 2k8m 2ki6 2lha 2n1t 3f00 3f01 3f04 3f05 4isq 4v11

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(no "Related Entries Specified in the PDB File" available for 2R83)