2N1T

Dynamic binding mode of a synaptotagmin-1-SNARE complex in solution


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 10000 
  • Conformers Submitted: 
  • Selection Criteria: Contribution to fit PCS data 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dynamic binding mode of a Synaptotagmin-1-SNARE complex in solution.

Brewer, K.D.Bacaj, T.Cavalli, A.Camilloni, C.Swarbrick, J.D.Liu, J.Zhou, A.Zhou, P.Barlow, N.Xu, J.Seven, A.B.Prinslow, E.A.Voleti, R.Haussinger, D.Bonvin, A.M.Tomchick, D.R.Vendruscolo, M.Graham, B.Sudhof, T.C.Rizo, J.

(2015) Nat.Struct.Mol.Biol. 22: 555-564

  • DOI: 10.1038/nsmb.3035

  • PubMed Abstract: 
  • Rapid neurotransmitter release depends on the Ca2+ sensor Synaptotagmin-1 (Syt1) and the SNARE complex formed by synaptobrevin, syntaxin-1 and SNAP-25. How Syt1 triggers release has been unclear, partly because elucidating high-resolution structures ...

    Rapid neurotransmitter release depends on the Ca2+ sensor Synaptotagmin-1 (Syt1) and the SNARE complex formed by synaptobrevin, syntaxin-1 and SNAP-25. How Syt1 triggers release has been unclear, partly because elucidating high-resolution structures of Syt1-SNARE complexes has been challenging. An NMR approach based on lanthanide-induced pseudocontact shifts now reveals a dynamic binding mode in which basic residues in the concave side of the Syt1 C2B-domain β-sandwich interact with a polyacidic region of the SNARE complex formed by syntaxin-1 and SNAP-25. The physiological relevance of this dynamic structural model is supported by mutations in basic residues of Syt1 that markedly impair SNARE-complex binding in vitro and Syt1 function in neurons. Mutations with milder effects on binding have correspondingly milder effects on Syt1 function. Our results support a model whereby dynamic interaction facilitates cooperation between Syt1 and the SNAREs in inducing membrane fusion.


    Organizational Affiliation

    1] Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas, USA. [2] Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas, USA. [3] Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vesicle-associated membrane protein 2
A
69Rattus norvegicusMutation(s): 0 
Gene Names: Vamp2 (Syb2)
Find proteins for P63045 (Rattus norvegicus)
Go to UniProtKB:  P63045
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Syntaxin-1A
B
72Rattus norvegicusMutation(s): 0 
Gene Names: Stx1a (Sap)
Find proteins for P32851 (Rattus norvegicus)
Go to UniProtKB:  P32851
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Synaptosomal-associated protein 25
C
77Homo sapiensMutation(s): 0 
Gene Names: SNAP25 (SNAP)
Find proteins for P60880 (Homo sapiens)
Go to Gene View: SNAP25
Go to UniProtKB:  P60880
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Synaptosomal-associated protein 25
D
74Homo sapiensMutation(s): 0 
Gene Names: SNAP25 (SNAP)
Find proteins for P60880 (Homo sapiens)
Go to Gene View: SNAP25
Go to UniProtKB:  P60880
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Synaptotagmin-1
E
156Homo sapiensMutation(s): 0 
Gene Names: SYT1 (SVP65, SYT)
Find proteins for P21579 (Homo sapiens)
Go to Gene View: SYT1
Go to UniProtKB:  P21579
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 10000 
  • Conformers Submitted: 
  • Selection Criteria: Contribution to fit PCS data 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2015-06-03
    Type: Initial release
  • Version 1.1: 2015-06-17
    Type: Database references
  • Version 1.2: 2015-07-22
    Type: Database references