2A7R

Crystal structure of human Guanosine Monophosphate reductase 2 (GMPR2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.228 

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This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of Human Guanosine Monophosphate Reductase 2 (GMPR2) in Complex with GMP

Li, J.Wei, Z.Zheng, M.Gu, X.Deng, Y.Qiu, R.Chen, F.Ji, C.Gong, W.Xie, Y.Mao, Y.

(2006) J Mol Biol 355: 980-988

  • DOI: 10.1016/j.jmb.2005.11.047
  • Primary Citation of Related Structures:  
    2A7R

  • PubMed Abstract: 
  • Guanosine monophosphate reductase (GMPR) catalyzes the irreversible and NADPH-dependent reductive deamination of GMP to IMP, and plays a critical role in re-utilization of free intracellular bases and purine nucleosides. Here, we report the first crystal structure of human GMP reductase 2 (hGMPR2) in complex with GMP at 3 ...

    Guanosine monophosphate reductase (GMPR) catalyzes the irreversible and NADPH-dependent reductive deamination of GMP to IMP, and plays a critical role in re-utilization of free intracellular bases and purine nucleosides. Here, we report the first crystal structure of human GMP reductase 2 (hGMPR2) in complex with GMP at 3.0 A resolution. The protein forms a tetramer composed of subunits adopting the ubiquitous (alpha/beta)8 barrel fold. Interestingly, the substrate GMP is bound to hGMPR2 through interactions with Met269, Ser270, Arg286, Ser288, and Gly290; this makes the conformation of the adjacent flexible binding region (residues 268-289) fixed, much like a door on a hinge. Structure comparison and sequence alignment analyses show that the conformation of the active site loop (residues 179-187) is similar to those of hGMPR1 and inosine monophosphate dehydrogenases (IMPDHs). We propose that Cys186 is the potential active site, and that the conformation of the loop (residues 129-133) suggests a preference for the coenzyme NADPH over NADH. This structure provides important information towards understanding the functions of members of the GMPR family.


    Organizational Affiliation

    State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GMP reductase 2A, B, C, D366Homo sapiensMutation(s): 0 
Gene Names: GMPR2
EC: 1.7.1.7
UniProt & NIH Common Fund Data Resources
Find proteins for Q9P2T1 (Homo sapiens)
Explore Q9P2T1 
Go to UniProtKB:  Q9P2T1
PHAROS:  Q9P2T1
GTEx:  ENSG00000100938 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9P2T1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.228 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.56α = 90
b = 110.56β = 90
c = 209.75γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
ADDREFdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-01-31
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance