7ATP

2.0 angstrom structure in complex with Ca of plant Extended Synaptotagmin 1, C2A domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The structure and flexibility analysis of the Arabidopsis synaptotagmin 1 reveal the basis of its regulation at membrane contact sites.

Benavente, J.L.Siliqi, D.Infantes, L.Lagartera, L.Mills, A.Gago, F.Ruiz-Lopez, N.Botella, M.A.Sanchez-Barrena, M.J.Albert, A.

(2021) Life Sci Alliance 4

  • DOI: 10.26508/lsa.202101152
  • Primary Citation of Related Structures:  
    7AS6, 7ATP

  • PubMed Abstract: 
  • Non-vesicular lipid transfer at ER and plasma membrane (PM) contact sites (CS) is crucial for the maintenance of membrane lipid homeostasis. Extended synaptotagmins (E-Syts) play a central role in this process as they act as molecular tethers of ER and PM and as lipid transfer proteins between these organelles ...

    Non-vesicular lipid transfer at ER and plasma membrane (PM) contact sites (CS) is crucial for the maintenance of membrane lipid homeostasis. Extended synaptotagmins (E-Syts) play a central role in this process as they act as molecular tethers of ER and PM and as lipid transfer proteins between these organelles. E-Syts are proteins constitutively anchored to the ER through an N-terminal hydrophobic segment and bind the PM via a variable number of C-terminal C2 domains. Synaptotagmins (SYTs) are the plant orthologous of E-Syts and regulate the ER-PM communication in response to abiotic stress. Combining different structural and biochemical techniques, we demonstrate that the binding of SYT1 to lipids occurs through a Ca 2+ -dependent lipid-binding site and by a site for phosphorylated forms of phosphatidylinositol, thus integrating two different molecular signals in response to stress. In addition, we show that SYT1 displays three highly flexible hinge points that provide conformational freedom to facilitate lipid extraction, protein loading, and subsequent transfer between PM and ER.


    Organizational Affiliation

    Instituto de Química Física "Rocasolano," Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain xalbert@iqfr.csic.es.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptotagmin-1A145Arabidopsis thalianaMutation(s): 0 
Gene Names: SYT1SYTAAt2g20990F26H11.25F5H14.5
Membrane Entity: Yes 
UniProt
Find proteins for Q9SKR2 (Arabidopsis thaliana)
Explore Q9SKR2 
Go to UniProtKB:  Q9SKR2
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
D [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.127α = 90
b = 69.127β = 90
c = 115.669γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-18
    Type: Initial release
  • Version 1.1: 2021-10-06
    Changes: Data collection, Database references, Structure summary