3V0F

Crystal structure of Ciona intestinalis voltage sensor-containing phosphatase (Ci-VSP), residues 241-576(C363S), form II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.140 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A glutamate switch controls voltage-sensitive phosphatase function.

Liu, L.Kohout, S.C.Xu, Q.Muller, S.Kimberlin, C.R.Isacoff, E.Y.Minor, D.L.

(2012) Nat.Struct.Mol.Biol. 19: 633-641

  • DOI: 10.1038/nsmb.2289
  • Primary Citation of Related Structures:  3V0D, 3V0E, 3V0G, 3V0H, 3V0I, 3V0J

  • PubMed Abstract: 
  • The Ciona intestinalis voltage-sensing phosphatase (Ci-VSP) couples a voltage-sensing domain (VSD) to a lipid phosphatase that is similar to the tumor suppressor PTEN. How the VSD controls enzyme function has been unclear. Here, we present high-resol ...

    The Ciona intestinalis voltage-sensing phosphatase (Ci-VSP) couples a voltage-sensing domain (VSD) to a lipid phosphatase that is similar to the tumor suppressor PTEN. How the VSD controls enzyme function has been unclear. Here, we present high-resolution crystal structures of the Ci-VSP enzymatic domain that reveal conformational changes in a crucial loop, termed the 'gating loop', that controls access to the active site by a mechanism in which residue Glu411 directly competes with substrate. Structure-based mutations that restrict gating loop conformation impair catalytic function and demonstrate that Glu411 also contributes to substrate selectivity. Structure-guided mutations further define an interaction between the gating loop and linker that connects the phosphatase to the VSD for voltage control of enzyme activity. Together, the data suggest that functional coupling between the gating loop and the linker forms the heart of the regulatory mechanism that controls voltage-dependent enzyme activation.


    Organizational Affiliation

    Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Voltage-sensor containing phosphatase
A, B
339Ciona intestinalisGene Names: Ci-VSP
Find proteins for Q4W8A1 (Ciona intestinalis)
Go to UniProtKB:  Q4W8A1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.140 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 50.746α = 90.00
b = 80.375β = 93.12
c = 83.637γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
MOLREPphasing
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-09
    Type: Initial release
  • Version 1.1: 2012-07-25
    Type: Database references
  • Version 1.2: 2014-11-12
    Type: Structure summary