Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17194.41 
• Atom Count: 1071 
• Residue Count: 152 
• Unique protein chains: 1

1RSY

STRUCTURE OF THE FIRST C2-DOMAIN OF SYNAPTOTAGMIN I: A NOVEL CA2+(SLASH)PHOSPHOLIPID BINDING FOLD

• DOI: 10.2210/pdb1RSY/pdb

• Classification: CALCIUM/PHOSPHOLIPID BINDING PROTEIN
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli


• Deposited: 1995-02-01 Released: 1995-05-08 
• Deposition Author(s): Sutton, R.B., Sprang, S.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.249 
• R-Value Work: 0.186 

Literature

Structure of the first C2 domain of synaptotagmin I: a novel Ca2+/phospholipid-binding fold.

Sutton, R.B., Davletov, B.A., Berghuis, A.M., Sudhof, T.C., Sprang, S.R.

(1995) Cell 80: 929-938

• PubMed: 7697723 
• Also Cited By: 4WEE


• PubMed Abstract: 
  

C2 domains are regulatory sequence motifs that occur widely in nature. Synaptotagmin I, a synaptic vesicle protein involved in the Ca2+ regulation of exocytosis, contains two C2 domains, the first of which acts as a Ca2+ sensor. We now describe the three-dimensional structure of this C2 domain at 1.9 A resolution in both the Ca(2+)-bound and Ca(2+)-free forms. The C2 polypeptide forms an eight-stranded beta sandwich constructed around a conserved four-stranded motif designated as a C2 key. Ca2+ binds in a cup-shaped depression between two polypeptide loops located at the N- and C-termini of the C2-key motif.

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Related Citations: 

• A Single C2 Domain from Synaptotagmin I is Sufficient for High Affinity Ca2+(Slash)Phospholipid Binding
  Davletov, B.A.,Sudhof, T.C.
  (1993) J.Biol.Chem. 268: 26386




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Organizational Affiliation: 

Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75235.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
SYNAPTOTAGMIN I	A	152	Rattus norvegicus	Mutation(s): 0  Gene Names: Syt1
Find proteins for P21707 (Rattus norvegicus) Go to UniProtKB:  P21707

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.249 
• R-Value Work: 0.186 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 42.300	α = 90.00
b = 38.900	β = 96.90
c = 44.600	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
X-PLOR	refinement
X-PLOR	phasing
X-PLOR	model building

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-02-01 
• Released Date: 1995-05-08 
• Deposition Author(s): Sutton, R.B., Sprang, S.R.

Revision History 

• Version 1.0: 1995-05-08
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance