4LDR

Structure of the S283Y mutant of MRDI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.292 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Mediator of RhoA-Dependent Invasion (MRDI) Explains Its Dual Function as a Metabolic Enzyme and a Mediator of Cell Invasion.

Templeton, P.D.Litman, E.S.Metzner, S.I.Ahn, N.G.Sousa, M.C.

(2013) Biochemistry 52: 5675-5684

  • DOI: 10.1021/bi400556e
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Metastatic melanoma is among the most intractable cancers to treat; patients show resistance to therapy and limited survival time. A critical step in the development of metastatic melanoma is the acquisition of invasion and transition from thin to th ...

    Metastatic melanoma is among the most intractable cancers to treat; patients show resistance to therapy and limited survival time. A critical step in the development of metastatic melanoma is the acquisition of invasion and transition from thin to thick tumors on the skin, followed by invasion to lymph nodes. Prior studies have shown that metastatic melanoma is associated with dysregulation of RhoA and enhanced expression of a protein named "mediator of RhoA-dependent invasion (MRDI)". Importantly, MRDI is a "moonlighting" enzyme, with two distinct functions in melanoma cells. First, MRDI acts as a methylthioribose-1-phosphate (MTR-1-P) isomerase, catalyzing a critical step in methionine salvage. Second, MRDI promotes and is necessary for melanoma cell invasion, independent of its catalytic activity. This paper demonstrates that MtnA, a bacterial MTR-1-P isomerase, rescues the methionine salvage function of MRDI, but is unable to rescue its role in invasion. The crystal structure of MRDI was solved to a resolution of 2.5 Å to identify structural elements important for its invasion activity. This structure and its comparison with other MTR-1-P isomerases are presented, and mutations within a region separate from the MTR-1-P binding site, which interfere with invasion, are identified. Thus, structural elements in MRDI distal from the MTR-1-P catalytic site are responsible for the invasion phenotype.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, CO 80309-0596, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Methylthioribose-1-phosphate isomerase
A, B
369Homo sapiensMutation(s): 1 
Gene Names: MRI1 (MRDI)
EC: 5.3.1.23
Find proteins for Q9BV20 (Homo sapiens)
Go to Gene View: MRI1
Go to UniProtKB:  Q9BV20
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.292 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.518α = 90.00
b = 115.970β = 90.00
c = 135.500γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2013-09-04
    Type: Database references
  • Version 1.2: 2018-04-18
    Type: Data collection