4Y7I

Crystal Structure of MTMR8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.802 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of the catalytic phosphatase domain of MTMR8: implications for dimerization, membrane association and reversible oxidation.

Yoo, K.Y.Son, J.Y.Lee, J.U.Shin, W.Im, D.W.Kim, S.J.Ryu, S.E.Heo, Y.S.

(2015) Acta Crystallogr.,Sect.D 71: 1528-1539

  • DOI: 10.1107/S139900471500927X

  • PubMed Abstract: 
  • Myotubularin-related proteins are a large family of phosphoinositide phosphatases; their activity, stability and subcellular localization are regulated by dimeric interactions with other members of the family. Here, the crystal structure of the phosp ...

    Myotubularin-related proteins are a large family of phosphoinositide phosphatases; their activity, stability and subcellular localization are regulated by dimeric interactions with other members of the family. Here, the crystal structure of the phosphatase domain of MTMR8 is reported. Conformational deviation of the two loops that mediate interaction with the PH-GRAM domain suggests that the PH-GRAM domain interacts differently with the phosphatase domain of each MTMR member. The protein exists as a dimer with twofold symmetry, providing insight into a novel mode of dimerization mediated by the phosphatase domain. Structural comparison and mutation studies suggest that Lys255 of MTMR8 interacts with the substrate diacylglycerol moiety, similar to Lys333 of MTMR2, although the positions of these residues are different. The catalytic activity of the MTMR8 phosphatase domain is inhibited by oxidation and is reversibly reactivated by reduction, suggesting the presence of an oxidation-protective intermediate other than a disulfide bond owing to the absence of a cysteine within a disulfide-bond distance from Cys338.


    Organizational Affiliation

    Department of Chemistry, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myotubularin-related protein 8
A, B
392Homo sapiensMutation(s): 1 
Gene Names: MTMR8
Membrane protein
mpstruct
Group: 
MONOTOPIC MEMBRANE PROTEINS
Sub Group: 
Phosphoinositide Phosphatases
Protein: 
MTMR8 catalytic phosphatase domain
Find proteins for Q96EF0 (Homo sapiens)
Go to Gene View: MTMR8
Go to UniProtKB:  Q96EF0
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: 2.802 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.573α = 90.00
b = 77.188β = 90.00
c = 197.793γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
PHENIXrefinement
REFMACphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-15
    Type: Initial release