4Y7I

Crystal Structure of MTMR8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 

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 D Biol Crystallogr 71: 1528-1539

  • DOI: https://doi.org/10.1107/S139900471500927X
  • Primary Citation of Related Structures:  
    4Y7I

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Myotubularin-related protein 8
A, B
392Homo sapiensMutation(s): 1 
Gene Names: MTMR8
EC: 3.1.3
UniProt & NIH Common Fund Data Resources
Find proteins for Q96EF0 (Homo sapiens)
Explore Q96EF0 
Go to UniProtKB:  Q96EF0
PHAROS:  Q96EF0
GTEx:  ENSG00000102043 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96EF0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.573α = 90
b = 77.188β = 90
c = 197.793γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
REFMACphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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