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(-) Description

Title :  STRUCTURAL BASIS FOR A MUNC13-1 DIMERIC - MUNC13-1 - RIM HETERODIMER SWITCH: C2-DOMAINS AS VERSATILE PROTEIN-PROTEIN INTERACTION MODULES
 
Authors :  J. Lu, M. Machius, I. Dulubova, H. Dai, T. C. Sudhof, D. R. Tomchick, J. Ri
Date :  06 Apr 06  (Deposition) - 07 Jun 06  (Release) - 28 Sep 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.44
Chains :  Asym. Unit :  A,B,C,D
Biol. Unit 1:  A,C  (1x)
Biol. Unit 2:  B,D  (1x)
Keywords :  Phorbol-Ester Binding, Neurotransmitter Release, Rim, Munc13, C2 Domains, Exocytosis, Metal-Binding, Protein-Protein Interactions, Zinc Finger, Synaptosome (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. Lu, M. Machius, I. Dulubova, H. Dai, T. C. Sudhof, D. R. Tomchick, J. Rizo
Structural Basis For A Munc13-1 Dimeric To Munc13-1/Rim Heterodimer Switch
Plos Biol. V. 4 E192 2006
PubMed-ID: 16732694  |  Reference-DOI: 10.1371/JOURNAL.PBIO.0040192
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - UNC-13 HOMOLOG A
    Chains: A, B, C, D
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PGEX-KG
    Expression System Strain: BL21
    Expression System Taxid: 511693
    Fragment: C2A DOMAIN, RESIDUES 1-128
    Organism Common: RAT
    Organism Scientific: RATTUS NORVEGICUS
    Organism Taxid: 10116
    Other Details: THE RECOMBINANT PROTEIN CONTAINS RESIDUES 1-128 OF MUNC13-1 AND VECTOR-DERIVED SEQUENCES, GGV- AT THE N-TERMINUS
    Synonym: MUNC13-1

 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  (2, 34)

Asymmetric Unit (2, 34)
No.NameCountTypeFull Name
1EDO23Ligand/Ion1,2-ETHANEDIOL
2FMT11Ligand/IonFORMIC ACID
Biological Unit 1 (2, 18)
No.NameCountTypeFull Name
1EDO11Ligand/Ion1,2-ETHANEDIOL
2FMT7Ligand/IonFORMIC ACID
Biological Unit 2 (2, 16)
No.NameCountTypeFull Name
1EDO12Ligand/Ion1,2-ETHANEDIOL
2FMT4Ligand/IonFORMIC ACID

(-) Sites  (34, 34)

Asymmetric Unit (34, 34)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREGLN A:17 , GLY A:40 , SER A:41 , GLN A:42 , HOH A:2084 , HOH A:2182BINDING SITE FOR RESIDUE EDO A1129
02AC2SOFTWARECYS A:5 , GLY A:7 , LYS A:9 , ASP A:48 , GLU A:91 , ASP A:124 , HIS A:126BINDING SITE FOR RESIDUE EDO A1130
03AC3SOFTWAREVAL A:0 , MET A:1 , SER A:2 , ILE A:53 , ASN A:54 , LEU A:56 , ILE A:70 , HOH A:2183 , HOH A:2184BINDING SITE FOR RESIDUE EDO A1131
04AC4SOFTWAREARG A:86 , GLY A:92 , PRO A:93 , GLY A:94 , GLU A:95 , ASP A:124 , ALA A:125 , EDO A:1133BINDING SITE FOR RESIDUE EDO A1132
05AC5SOFTWAREGLU A:95 , LEU A:123 , ALA A:125 , EDO A:1132 , HOH A:2178BINDING SITE FOR RESIDUE EDO A1133
06AC6SOFTWAREGLY A:68 , LEU A:69 , ILE A:70 , ASP A:72 , HOH A:2130 , HOH A:2133 , SER C:33 , THR C:34BINDING SITE FOR RESIDUE EDO A1134
07AC7SOFTWAREASP A:48 , MET A:50 , FMT A:1139 , HOH A:2187 , HOH A:2188 , HOH A:2189 , TRP B:96 , HOH B:2154BINDING SITE FOR RESIDUE EDO A1135
08AC8SOFTWAREASN A:89 , GLU A:128 , HOH A:2181 , HOH A:2190 , THR B:98 , PHE B:118 , ARG B:120BINDING SITE FOR RESIDUE EDO A1136
09AC9SOFTWARELYS B:27 , LYS B:32 , GLU B:63 , TRP B:65 , LYS D:27 , LYS D:32 , GLU D:63BINDING SITE FOR RESIDUE EDO B1129
10BC1SOFTWAREGLY B:68 , ILE B:70 , TRP B:71 , ASP B:72 , HOH B:2119 , HOH B:2127 , HOH B:2189 , SER D:33 , THR D:34BINDING SITE FOR RESIDUE EDO B1130
11BC2SOFTWARETHR A:98 , PHE A:118 , ARG A:120 , ASN B:89 , GLU B:128 , HOH B:2187BINDING SITE FOR RESIDUE EDO B1131
12BC3SOFTWAREARG B:86 , GLY B:92 , PRO B:93 , GLY B:94 , ASP B:124 , ALA B:125 , EDO B:1133 , FMT B:1136BINDING SITE FOR RESIDUE EDO B1132
13BC4SOFTWAREILE B:80 , GLU B:95 , LEU B:123 , ALA B:125 , EDO B:1132 , FMT B:1136 , HOH B:2191BINDING SITE FOR RESIDUE EDO B1133
14BC5SOFTWAREVAL B:0 , SER B:2 , ILE B:53 , ASN B:54 , EDO D:1131 , HOH D:2129 , HOH D:2130BINDING SITE FOR RESIDUE EDO B1134
15BC6SOFTWAREFMT A:3144 , CYS B:5 , GLY B:7 , LYS B:9 , ASP B:48 , GLU B:91 , ASP B:124 , HIS B:126BINDING SITE FOR RESIDUE EDO B1135
16BC7SOFTWARELYS A:27 , LYS A:32 , GLU A:63 , TRP A:65 , LYS C:27 , LYS C:32 , GLU C:63BINDING SITE FOR RESIDUE EDO C1129
17BC8SOFTWARETRP B:71 , ARG B:83 , PHE D:51 , GLU D:52 , HOH D:2126BINDING SITE FOR RESIDUE EDO D1129
18BC9SOFTWAREGLU D:95 , LEU D:123 , ASP D:124 , ALA D:125 , FMT D:1134 , HOH D:2127 , HOH D:2128BINDING SITE FOR RESIDUE EDO D1130
19CC1SOFTWARELEU B:56 , ILE B:70 , ARG B:83 , EDO B:1134 , SER D:33 , PHE D:49 , MET D:50 , PHE D:51 , HOH D:2129 , HOH D:2130BINDING SITE FOR RESIDUE EDO D1131
20CC2SOFTWAREGLY B:-2 , GLY B:-1 , GLN D:47 , HOH D:2131BINDING SITE FOR RESIDUE EDO D1132
21CC3SOFTWAREGLY D:7 , LYS D:9 , GLU D:46 , GLN D:47 , ASP D:48BINDING SITE FOR RESIDUE EDO D1133
22CC4SOFTWAREGLN B:17 , GLY B:40 , SER B:41 , GLN B:42 , HOH C:3001 , HOH C:3002BINDING SITE FOR RESIDUE EDO C3123
23CC5SOFTWARETRP A:96 , HOH A:2159 , HOH A:2160 , HOH A:3003 , HOH A:3004 , ASP B:48 , MET B:50BINDING SITE FOR RESIDUE EDO A3135
24CC6SOFTWAREGLY A:68 , LEU A:69 , GLN A:87 , HOH A:2191BINDING SITE FOR RESIDUE FMT A1137
25CC7SOFTWAREASN A:66 , THR A:73 , MET A:74BINDING SITE FOR RESIDUE FMT A1138
26CC8SOFTWAREGLN A:47 , ASP A:48 , EDO A:1135 , HOH A:2192 , HOH A:2193 , HOH B:2154 , HOH C:2078BINDING SITE FOR RESIDUE FMT A1139
27CC9SOFTWARETHR A:113 , LYS A:114 , HOH A:2194 , ARG B:39BINDING SITE FOR RESIDUE FMT A1140
28DC1SOFTWAREILE B:85 , ARG B:86 , ALA B:125 , EDO B:1132 , EDO B:1133 , HOH B:2191BINDING SITE FOR RESIDUE FMT B1136
29DC2SOFTWARELYS C:67 , GLY C:68 , LEU C:69 , ILE C:70 , ASP C:72 , HOH C:2118 , HOH C:2119BINDING SITE FOR RESIDUE FMT C1130
30DC3SOFTWAREGLY A:-2 , GLU C:46 , ASP C:48 , GLU C:91BINDING SITE FOR RESIDUE FMT C1131
31DC4SOFTWAREARG D:86 , GLY D:92 , PRO D:93 , GLY D:94 , GLU D:95 , ASP D:124 , EDO D:1130BINDING SITE FOR RESIDUE FMT D1134
32DC5SOFTWARETHR D:117BINDING SITE FOR RESIDUE FMT D1135
33DC6SOFTWARELYS D:67 , GLY D:68 , LEU D:69 , ILE D:70 , TRP D:71 , ASP D:72 , HOH D:2085BINDING SITE FOR RESIDUE FMT D1136
34DC7SOFTWAREGLY B:7 , LYS B:9 , GLU B:46 , ASP B:48 , GLU B:91 , EDO B:1135BINDING SITE FOR RESIDUE FMT A3144

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2CJT)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2CJT)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 2CJT)

(-) Exons   (0, 0)

(no "Exon" information available for 2CJT)

(-) 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:121
 aligned with UN13A_RAT | Q62768 from UniProtKB/Swiss-Prot  Length:1735

    Alignment length:131
                               1                                                                                                                               
                               |     7        17        27        37        47        57        67        77        87        97       107       117       127 
            UN13A_RAT     - ---MSLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDSQAIMADSEICGTKDPTFHRILLDAHFE 128
               SCOP domains ---d2cjta1 A:1-128 Unc-13 homolog A                                                                                                 SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....eeeeeeeeeee...hhhh.eeeeeeee..eeee...ee....eeeeeeeeee.....eeeeeeee.....eeeeeeeeee.hhh.........eeee...----------........eeeeeeeee Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2cjt A  -2 GGVMSLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDS----------GTKDPTFHRILLDAHFE 128
                                     7        17        27        37        47        57        67        77        87        97   |     -    |  117       127 
                                                                                                                                 101        112                


Chain B from PDB  Type:PROTEIN  Length:121
 aligned with UN13A_RAT | Q62768 from UniProtKB/Swiss-Prot  Length:1735

    Alignment length:131
                               1                                                                                                                               
                               |     7        17        27        37        47        57        67        77        87        97       107       117       127 
            UN13A_RAT     - ---MSLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDSQAIMADSEICGTKDPTFHRILLDAHFE 128
               SCOP domains d2cjtb_ B: automated matches                                                                                                        SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....eeeeeeeeeee...hhhh.eeeeeeee..eeee...ee....eeeeeeeeee.....eeeeeeee.....eeeeeeeeee.hhh.........eeee...----------........eeeeeeeee Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2cjt B  -2 GGVMSLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDS----------GTKDPTFHRILLDAHFE 128
                                     7        17        27        37        47        57        67        77        87        97   |     -    |  117       127 
                                                                                                                                 101        112                


Chain C from PDB  Type:PROTEIN  Length:127
 aligned with UN13A_RAT | Q62768 from UniProtKB/Swiss-Prot  Length:1735

    Alignment length:127
                                    11        21        31        41        51        61        71        81        91       101       111       121       
            UN13A_RAT     2 SLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDSQAIMADSEICGTKDPTFHRILLDAHFE 128
               SCOP domains d2cjtc_ C: automated matches                                                                                                    SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeeeeeee...hhhh.eeeeeeee..eeee.........eeeeeeeee......eeeeeeee.....eeeeeeeeee.hhh.........eeeeeeeeeeee..eeeeeeeeeeeeeeeeeeee Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2cjt C   2 SLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDSQAIMADSEICGTKDPTFHRILLDAHFE 128
                                    11        21        31        41        51        61        71        81        91       101       111       121       


Chain D from PDB  Type:PROTEIN  Length:127
 aligned with UN13A_RAT | Q62768 from UniProtKB/Swiss-Prot  Length:1735

    Alignment length:127
                                    11        21        31        41        51        61        71        81        91       101       111       121       
            UN13A_RAT     2 SLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDSQAIMADSEICGTKDPTFHRILLDAHFE 128
               SCOP domains d2cjtd_ D: automated matches                                                                                                    SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeeeeeeee...hhhh.eeeeeeee..eeee.........eeeeeeeee......eeeeeeee.....eeeeeeeeee.hhh.........eeeeeeeeeeee..eeeeeeeeeeeeeeeeeeee Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2cjt D   2 SLLCVGVKKAKFDGAQEKFNTYVTLKVQNVKSTTIAVRGSQPSWEQDFMFEINRLDLGLTVEVWNKGLIWDTMVGTVWIPLRTIRQSNEEGPGEWLTLDSQAIMADSEICGTKDPTFHRILLDAHFE 128
                                    11        21        31        41        51        61        71        81        91       101       111       121
   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  (2, 4)

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

(-) CATH Domains  (0, 0)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2CJT)

(-) Gene Ontology  (26, 26)

Asymmetric Unit(hide GO term definitions)
Chain A,B,C,D   (UN13A_RAT | Q62768)
molecular function
    GO:0000149    SNARE binding    Interacting selectively and non-covalently with a SNARE (soluble N-ethylmaleimide-sensitive factor attached protein receptor) protein.
    GO:0019992    diacylglycerol binding    Interacting selectively and non-covalently with diacylglycerol, a diester of glycerol and two fatty acids.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0047485    protein N-terminus binding    Interacting selectively and non-covalently with a protein N-terminus, the end of any peptide chain at which the 2-amino (or 2-imino) function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue.
    GO:0019904    protein domain specific binding    Interacting selectively and non-covalently with a specific domain of a protein.
    GO:0046982    protein heterodimerization activity    Interacting selectively and non-covalently with a nonidentical protein to form a heterodimer.
    GO:0042803    protein homodimerization activity    Interacting selectively and non-covalently with an identical protein to form a homodimer.
    GO:0030507    spectrin binding    Interacting selectively and non-covalently with spectrin, a protein that is the major constituent of the erythrocyte cytoskeletal network. It associates with band 4.1 (see band protein) and actin to form the cytoskeletal superstructure of the erythrocyte plasma membrane. It is composed of nonhomologous chains, alpha and beta, which aggregate side-to-side in an antiparallel fashion to form dimers, tetramers, and higher polymers.
    GO:0017075    syntaxin-1 binding    Interacting selectively and non-covalently with the SNAP receptor syntaxin-1.
biological process
    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: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: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:0035556    intracellular signal transduction    The process in which a signal is passed on to downstream components within the cell, which become activated themselves to further propagate the signal and finally trigger a change in the function or state of the 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:0007269    neurotransmitter secretion    The regulated release of neurotransmitter from the presynapse into the synaptic cleft via calcium regualated exocytosis during synaptic transmission.
    GO:0016082    synaptic vesicle priming    A process that converts synaptic vesicles to a state of competence for calcium triggered fusion with the active zone membrane by bringing the two membranes into very close proximity. Priming typically (but not always) occurs after docking (Jahn and Fasshauer, 2012). Primed vesicles are also capable of spontaneously fusing with the active zone membrane.
cellular component
    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:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    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: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:0043234    protein complex    A stable macromolecular complex composed (only) of two or more polypeptide subunits along with any covalently attached molecules (such as lipid anchors or oligosaccharide) or non-protein prosthetic groups (such as nucleotides or metal ions). Prosthetic group in this context refers to a tightly bound cofactor. The component polypeptide subunits may be identical.
    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: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.

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  UN13A_RAT | Q62768
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  UN13A_RAT | Q62768
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 Related Entries

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

UniProtKB/Swiss-Prot
        UN13A_RAT | Q62768: 1y8f 2cjs 2kdu 3kwt 3kwu 3swh 4y21 5ue8 5uf7

(-) Related Entries Specified in the PDB File

1y8f SOLUTION STRUCTURE OF THE MUNC13-1 C1- DOMAIN
2cjs STRUCTURAL BASIS FOR A MUNC13-1 DIMERIC - MUNC13-1 - RIM HETERODIMER SWITCH: C2- DOMAINS AS VERSATILE PROTEIN-PROTEIN INTERACTION MODULES