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(-) Description

Title :  INFLUENCE OF CIRCULAR PERMUTATION ON THE FOLDING PATHWAY OF A PDZ DOMAIN
 
Authors :  G. Hultqvist, A. S. Punekar, C. N. Chi, M. Selmer, S. Gianni, P. Jemth
Date :  10 Mar 12  (Deposition) - 05 Dec 12  (Release) - 12 Dec 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.30
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Permutation, Protein Folding, Structural Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  G. Hultqvist, A. S. Punekar, A. Morrone, C. N. Chi, A. Engstrom, M. Selmer, S. Gianni, P. Jemth
Tolerance Of Protein Folding To A Circular Permutation In A Pdz Domain
Plos One V. 7 50055 2012
PubMed-ID: 23185531  |  Reference-DOI: 10.1371/JOURNAL.PONE.0050055

(-) Compounds

Molecule 1 - DISKS LARGE HOMOLOG 1
    ChainsA, B
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPRSET-CPSAP97-PDZ2-I342W-C378A
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System VariantPLYSS
    Expression System Vector TypePLASMID
    FragmentPDZ2 DOMAIN
    MutationYES
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    SynonymSYNAPSE-ASSOCIATED PROTEIN 97, SAP-97, SAP97, HDLG

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 2)

Asymmetric/Biological Unit (2, 2)
No.NameCountTypeFull Name
1GOL1Ligand/IonGLYCEROL
2TRS1Ligand/Ion2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHIS A:27 , GLN A:52 , HOH A:2004 , HOH A:2005 , HOH A:2031 , PRO B:29BINDING SITE FOR RESIDUE TRS A1106
2AC2SOFTWAREPRO A:29 , SER A:93 , GLY A:94 , ALA B:20 , GLY B:21 , ASN B:25 , GLN B:26 , HIS B:27BINDING SITE FOR RESIDUE GOL A1107

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 4AMH)

(-) Cis Peptide Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1Lys B:13 -Gly B:14
2Gly B:94 -Glu B:95

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 4AMH)

(-) PROSITE Motifs  (1, 2)

Asymmetric/Biological Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1PDZPS50106 PDZ domain profile.DLG1_HUMAN224-311
319-406
466-547
 
  2-
-
A:92-104
B:92-97

(-) Exons   (0, 0)

(no "Exon" information available for 4AMH)

(-) 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:94
 aligned with DLG1_HUMAN | Q12959 from UniProtKB/Swiss-Prot  Length:904

    Alignment length:209
                                   335       345       355       365       375       385       395       405       415       425       435       445       455       465       475       485       495       505       515       525         
           DLG1_HUMAN   326 PKGLGFSIAGGVGNQHIPGDNSIYVTKIIEGGAAHKDGKLQIGDKLLAVNNVCLEEVTHEEAVTALKNTSDFVYLKVAKPTSMYMNDGYAPPDITNSSSQPVDNHVSPSSFLGQTPASPARYSPVSKAVLGDDEITREPRKVVLHRGSTGLGFNIVGGEDGEGIFISFILAGGPADLSGELRKGDRIISVNSVDLRAASHEQAAAALKN 534
               SCOP domains d4amha_ A: automated matches                                                                                                                                                                                      SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeeee............eeeeee...hhhhhhh......eeeee..ee....hhhhhhhhhhh...eeeeeee..------------------------------------------------------------------..-----------------------------------...eeeee--------------ee.. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE PDZ  PDB: - UniProt: 319-406                                                     -----------------------------------------------------------PDZ  PDB: A:92-104 UniProt: 466-547                                   PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 4amh A  12 SKGLGFSIAGGVGNQHWPGDNSIYVTKIIEGGAAHKDGKLQIGDKLLAVNNVALEEVTHEEAVTALKNTSDFVYLKVAKP------------------------------------------------------------------GS-----------------------------------GEKIMEIK--------------LIKG 105
                                    21        31        41        51        61        71        81        91         -         -         -         -         -         -      || -         -         -         -   |   100|        -     |   
                                                                                                          91                                                                 92|                                  94    101            102   
                                                                                                                                                                              93                                                             

Chain B from PDB  Type:PROTEIN  Length:92
 aligned with DLG1_HUMAN | Q12959 from UniProtKB/Swiss-Prot  Length:904

    Alignment length:193
                                   336       346       356       366       376       386       396       406       416       426       436       446       456       466       476       486       496       506       516   
           DLG1_HUMAN   327 KGLGFSIAGGVGNQHIPGDNSIYVTKIIEGGAAHKDGKLQIGDKLLAVNNVCLEEVTHEEAVTALKNTSDFVYLKVAKPTSMYMNDGYAPPDITNSSSQPVDNHVSPSSFLGQTPASPARYSPVSKAVLGDDEITREPRKVVLHRGSTGLGFNIVGGEDGEGIFISFILAGGPADLSGELRKGDRIISVNSVD 519
               SCOP domains d4amhb_ B: automated matches                                                                                                                                                                      SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....eeeee............eeeeee...hhhhhhh......eeeee..ee....hhhhhhhhhhh...eeeeeee..------------------------------------------------------------------..-----------------------------------....eeeeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE PDZ  PDB: - UniProt: 319-406                                                    -----------------------------------------------------------PDZ  PDB: B:92-97 UniProt: 466-547                     PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 4amh B  13 KGLGFSIAGGVGNQHWPGDNSIYVTKIIEGGAAHKDGKLQIGDKLLAVNNVALEEVTHEEAVTALKNTSDFVYLKVAKP------------------------------------------------------------------GS-----------------------------------GEKIMEIKLIK 104
                                    22        32        42        52        62        72        82        |-         -         -         -         -         -         -     ||  -         -         -         -  |    101   
                                                                                                         91                                                                 92|                                  94          
                                                                                                                                                                             93                                              

   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, 2)

Asymmetric/Biological Unit

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 4AMH)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 4AMH)

(-) Gene Ontology  (101, 101)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (DLG1_HUMAN | Q12959)
molecular function
    GO:0097016    L27 domain binding    Interacting selectively and non-covalently with a L27 domain of a protein. L27 is composed of conserved negatively charged amino acids and a conserved aromatic amino acid. L27 domains can assemble proteins involved in signaling and establishment and maintenance of cell polarity into complexes by interacting in a heterodimeric manner.
    GO:0008092    cytoskeletal protein binding    Interacting selectively and non-covalently with any protein component of any cytoskeleton (actin, microtubule, or intermediate filament cytoskeleton).
    GO:0004385    guanylate kinase activity    Catalysis of the reaction: ATP + GMP = ADP + GDP.
    GO:0044325    ion channel binding    Interacting selectively and non-covalently with one or more specific sites on an ion channel, a protein complex that spans a membrane and forms a water-filled channel across the phospholipid bilayer allowing selective ion transport down its electrochemical gradient.
    GO:0035255    ionotropic glutamate receptor binding    Interacting selectively and non-covalently with an ionotropic glutamate receptor. Ionotropic glutamate receptors bind glutamate and exert an effect through the regulation of ion channels.
    GO:0019900    kinase binding    Interacting selectively and non-covalently with a kinase, any enzyme that catalyzes the transfer of a phosphate group.
    GO:0015276    ligand-gated ion channel activity    Enables the transmembrane transfer of an ion by a channel that opens when a specific ligand has been bound by the channel complex or one of its constituent parts.
    GO:0031434    mitogen-activated protein kinase kinase binding    Interacting selectively and non-covalently with a mitogen-activated protein kinase kinase, any protein that can phosphorylate a MAP kinase.
    GO:0019902    phosphatase binding    Interacting selectively and non-covalently with any phosphatase.
    GO:0004721    phosphoprotein phosphatase activity    Catalysis of the reaction: a phosphoprotein + H2O = a protein + phosphate. Together with protein kinases, these enzymes control the state of phosphorylation of cell proteins and thereby provide an important mechanism for regulating cellular activity.
    GO:0015459    potassium channel regulator activity    Modulates potassium channel activity via direct interaction interaction with a potassium channel (binding or modification).
    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:0032947    protein complex scaffold activity    A structural molecule activity that provides a physical support for the assembly of a multiprotein complex. The scaffold may or may not be part of the final complex.
    GO:0019901    protein kinase binding    Interacting selectively and non-covalently with a protein kinase, any enzyme that catalyzes the transfer of a phosphate group, usually from ATP, to a protein substrate.
biological process
    GO:0046710    GDP metabolic process    The chemical reactions and pathways involving GDP, guanosine 5'-diphosphate.
    GO:0046037    GMP metabolic process    The chemical reactions and pathways involving GMP, guanosine monophosphate.
    GO:0042110    T cell activation    The change in morphology and behavior of a mature or immature T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.
    GO:0002369    T cell cytokine production    Any process that contributes to cytokine production by a T cell.
    GO:0007015    actin filament organization    A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of cytoskeletal structures comprising actin filaments. Includes processes that control the spatial distribution of actin filaments, such as organizing filaments into meshworks, bundles, or other structures, as by cross-linking.
    GO:0032147    activation of protein kinase activity    Any process that initiates the activity of an inactive protein kinase.
    GO:0042982    amyloid precursor protein metabolic process    The chemical reactions and pathways involving amyloid precursor protein (APP), the precursor of amyloid-beta, a glycoprotein associated with Alzheimer's disease.
    GO:0030953    astral microtubule organization    A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of astral microtubules, any of the spindle microtubules that radiate in all directions from the spindle poles.
    GO:0070830    bicellular tight junction assembly    The aggregation, arrangement and bonding together of a set of components to form a tight junction, an occluding cell-cell junction that is composed of a branching network of sealing strands that completely encircles the apical end of each cell in an epithelial sheet.
    GO:0001658    branching involved in ureteric bud morphogenesis    The process in which the branching structure of the ureteric bud is generated and organized. The ureteric bud is an epithelial tube that grows out from the metanephric duct. The bud elongates and branches to give rise to the ureter and kidney collecting tubules.
    GO:0034629    cellular protein complex localization    A protein complex localization process that takes place at the cellular level; as a result, a protein complex is transported to, or maintained in, a specific location within a cell.
    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:0030866    cortical actin cytoskeleton organization    A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of actin-based cytoskeletal structures in the cell cortex, i.e. just beneath the plasma membrane.
    GO:0043622    cortical microtubule organization    A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of structures formed of microtubules and associated proteins in the cell cortex, i.e. just beneath the plasma membrane of a cell.
    GO:0048704    embryonic skeletal system morphogenesis    The process in which the anatomical structures of the skeleton are generated and organized during the embryonic phase.
    GO:0001935    endothelial cell proliferation    The multiplication or reproduction of endothelial cells, resulting in the expansion of a cell population. Endothelial cells are thin flattened cells which line the inside surfaces of body cavities, blood vessels, and lymph vessels, making up the endothelium.
    GO:0051660    establishment of centrosome localization    The directed movement of the centrosome to a specific location.
    GO:0007163    establishment or maintenance of cell polarity    Any cellular process that results in the specification, formation or maintenance of anisotropic intracellular organization or cell growth patterns.
    GO:0045197    establishment or maintenance of epithelial cell apical/basal polarity    Any cellular process that results in the specification, formation or maintenance of the apicobasal polarity of an epithelial cell.
    GO:0060022    hard palate development    The biological process whose specific outcome is the progression of the hard palate from an initial condition to its mature state. This process begins with the formation of the structure and ends with the mature structure, whatever form that may be including its natural destruction. The hard palate is the anterior portion of the palate consisting of bone and mucous membranes.
    GO:0001771    immunological synapse formation    The formation of an area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and target cell, which facilitates activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.
    GO:0034220    ion transmembrane transport    A process in which an ion is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.
    GO:0002088    lens development in camera-type eye    The process whose specific outcome is the progression of the lens over time, from its formation to the mature structure. The lens is a transparent structure in the eye through which light is focused onto the retina. An example of this process is found in Mus musculus.
    GO:0031579    membrane raft organization    A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of membrane rafts, small (10-200 nm), heterogeneous, highly dynamic, sterol- and sphingolipid-enriched membrane domains that compartmentalize cellular processes.
    GO:0007093    mitotic cell cycle checkpoint    A cell cycle checkpoint that ensures accurate chromosome replication and segregation by preventing progression through a mitotic cell cycle until conditions are suitable for the cell to proceed to the next stage.
    GO:0070373    negative regulation of ERK1 and ERK2 cascade    Any process that stops, prevents, or reduces the frequency, rate or extent of signal transduction mediated by the ERK1 and ERK2 cascade.
    GO:0042130    negative regulation of T cell proliferation    Any process that stops, prevents or reduces the rate or extent of T cell proliferation.
    GO:0050680    negative regulation of epithelial cell proliferation    Any process that stops, prevents or reduces the rate or extent of epithelial cell proliferation.
    GO:0045930    negative regulation of mitotic cell cycle    Any process that stops, prevents or reduces the rate or extent of progression through the mitotic cell cycle.
    GO:1903753    negative regulation of p38MAPK cascade    Any process that stops, prevents or reduces the frequency, rate or extent of p38MAPK cascade.
    GO:0051898    negative regulation of protein kinase B signaling    Any process that stops, prevents, or reduces the frequency, rate or extent of protein kinase B signaling, a series of reactions mediated by the intracellular serine/threonine kinase protein kinase B.
    GO:0000122    negative regulation of transcription from RNA polymerase II promoter    Any process that stops, prevents, or reduces the frequency, rate or extent of transcription from an RNA polymerase II promoter.
    GO:0007399    nervous system development    The process whose specific outcome is the progression of nervous tissue over time, from its formation to its mature state.
    GO:0030432    peristalsis    A wavelike sequence of involuntary muscular contraction and relaxation that passes along a tubelike structure, such as the intestine, impelling the contents onwards.
    GO:0030838    positive regulation of actin filament polymerization    Any process that activates or increases the frequency, rate or extent of actin polymerization.
    GO:0008284    positive regulation of cell proliferation    Any process that activates or increases the rate or extent of cell proliferation.
    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:0043268    positive regulation of potassium ion transport    Any process that activates or increases the frequency, rate or extent of the directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0006470    protein dephosphorylation    The process of removing one or more phosphoric residues from a protein.
    GO:0008104    protein localization    Any process in which a protein is transported to, or maintained in, a specific location.
    GO:0072659    protein localization to plasma membrane    A process in which a protein is transported to, or maintained in, a specific location in the plasma membrane.
    GO:0043113    receptor clustering    The receptor metabolic process that results in grouping of a set of receptors at a cellular location, often to amplify the sensitivity of a signaling response.
    GO:0097120    receptor localization to synapse    Any process in which a receptor is transported to, and/or maintained at the synapse, the junction between a nerve fiber of one neuron and another neuron or muscle fiber or glial cell.
    GO:1901222    regulation of NIK/NF-kappaB signaling    Any process that modulates the frequency, rate or extent of NIK/NF-kappaB signaling.
    GO:0008360    regulation of cell shape    Any process that modulates the surface configuration of a cell.
    GO:0042391    regulation of membrane potential    Any process that modulates the establishment or extent of a membrane potential, the electric potential existing across any membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane.
    GO:0031641    regulation of myelination    Any process that modulates the frequency, rate or extent of the formation of a myelin sheath around nerve axons.
    GO:1902305    regulation of sodium ion transmembrane transport    Any process that modulates the frequency, rate or extent of sodium ion transmembrane transport.
    GO:0048608    reproductive structure development    The reproductive developmental process whose specific outcome is the progression of structures that will be used in the process of creating new individuals from one or more parents, from their formation to the mature structures.
    GO:0016337    single organismal cell-cell adhesion    The attachment of one cell to another cell via adhesion molecules, where both cells are part of the same organism.
    GO:0048745    smooth muscle tissue development    The process whose specific outcome is the progression of smooth muscle over time, from its formation to the mature structure.
    GO:0048729    tissue morphogenesis    The process in which the anatomical structures of a tissue are generated and organized.
    GO:0001657    ureteric bud development    The process whose specific outcome is the progression of the ureteric bud over time, from its formation to the mature structure.
    GO:0016032    viral process    A multi-organism process in which a virus is a participant. The other participant is the host. Includes infection of a host cell, replication of the viral genome, and assembly of progeny virus particles. In some cases the viral genetic material may integrate into the host genome and only subsequently, under particular circumstances, 'complete' its life cycle.
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:0097025    MPP7-DLG1-LIN7 complex    A heterotrimeric protein complex formed by the association of MMP7, DLG1 and either LIN7A or LIN7C; regulates the stability and localization of DLG1 to cell junctions.
    GO:0005605    basal lamina    A thin sheet of proteoglycans and glycoproteins, especially laminin, secreted by cells as an extracellular matrix.
    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:0005923    bicellular tight junction    An occluding cell-cell junction that is composed of a branching network of sealing strands that completely encircles the apical end of each cell in an epithelial sheet; the outer leaflets of the two interacting plasma membranes are seen to be tightly apposed where sealing strands are present. Each sealing strand is composed of a long row of transmembrane adhesion proteins embedded in each of the two interacting plasma membranes.
    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:0031253    cell projection membrane    The portion of the plasma membrane surrounding a plasma membrane bounded cell surface projection.
    GO:0005911    cell-cell junction    A cell junction that forms a connection between two or more cells in a multicellular organism; excludes direct cytoplasmic junctions such as ring canals.
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0009898    cytoplasmic side of plasma membrane    The leaflet the plasma membrane that faces the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
    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:0005783    endoplasmic reticulum    The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached).
    GO:0005789    endoplasmic reticulum membrane    The lipid bilayer surrounding the endoplasmic reticulum.
    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:0001772    immunological synapse    An area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell formed through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and the target cell and facilitating activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.
    GO:0014704    intercalated disc    A complex cell-cell junction at which myofibrils terminate in cardiomyocytes; mediates mechanical and electrochemical integration between individual cardiomyocytes. The intercalated disc contains regions of tight mechanical attachment (fasciae adherentes and desmosomes) and electrical coupling (gap junctions) between adjacent cells.
    GO:0008328    ionotropic glutamate receptor complex    A multimeric assembly of four or five subunits which form a structure with an extracellular N-terminus and a large loop that together form the ligand binding domain. The C-terminus is intracellular. The ionotropic glutamate receptor complex itself acts as a ligand-gated ion channel; on binding glutamate, charged ions pass through a channel in the center of the receptor complex.
    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:0016328    lateral plasma membrane    The portion of the plasma membrane at the lateral side of the cell. In epithelial cells, lateral plasma membranes are on the sides of cells which lie at the interface of adjacent cells.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0045121    membrane raft    Any of the small (10-200 nm), heterogeneous, highly dynamic, sterol- and sphingolipid-enriched membrane domains that compartmentalize cellular processes. Small rafts can sometimes be stabilized to form larger platforms through protein-protein and protein-lipid interactions.
    GO:0005874    microtubule    Any of the long, generally straight, hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells; each consists (usually) of 13 protofilaments of polymeric tubulin, staggered in such a manner that the tubulin monomers are arranged in a helical pattern on the microtubular surface, and with the alpha/beta axes of the tubulin subunits parallel to the long axis of the tubule; exist in equilibrium with pool of tubulin monomers and can be rapidly assembled or disassembled in response to physiological stimuli; concerned with force generation, e.g. in the spindle.
    GO:0035748    myelin sheath abaxonal region    The region of the myelin sheath furthest from the axon.
    GO:0031594    neuromuscular junction    The junction between the axon of a motor neuron and a muscle fiber. In response to the arrival of action potentials, the presynaptic button releases molecules of neurotransmitters into the synaptic cleft. These diffuse across the cleft and transmit the signal to the postsynaptic membrane of the muscle fiber, leading to a change in post-synaptic potential.
    GO:0033268    node of Ranvier    An axon part that is a gap in the myelin where voltage-gated sodium channels cluster and saltatory conduction is executed.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
    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:0014069    postsynaptic density of dendrite    An electron dense network of proteins within and adjacent to the postsynaptic membrane of the dendrite of asymetric synapses. Its major components include neurotransmitter receptors and the proteins that spatially and functionally organize them such as anchoring and scaffolding molecules, signaling enzymes and cytoskeletal components.
    GO:0045211    postsynaptic membrane    A specialized area of membrane facing the presynaptic membrane on the tip of the nerve ending and separated from it by a minute cleft (the synaptic cleft). Neurotransmitters cross the synaptic cleft and transmit the signal to the postsynaptic membrane.
    GO:0042383    sarcolemma    The outer membrane of a muscle cell, consisting of the plasma membrane, a covering basement membrane (about 100 nm thick and sometimes common to more than one fiber), and the associated loose network of collagen fibers.
    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.

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        DLG1_HUMAN | Q129591pdr 2m3m 2oqs 2x7z 3lra 3rl7 3rl8 3w9y 4g69

(-) Related Entries Specified in the PDB File

1pdr CRYSTAL STRUCTURE OF THE THIRD PDZ DOMAIN FROM THE HUMANHOMOLOG OF DISCS LARGE PROTEIN
2x7z CRYSTAL STRUCTURE OF THE SAP97 PDZ2 I342W C378A MUTANT PROTEIN DOMAIN