1HMP

THE CRYSTAL STRUCTURE OF HUMAN HYPOXANTHINE-GUANINE PHOSPHORIBOSYLTRANSFERASE WITH BOUND GMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of human hypoxanthine-guanine phosphoribosyltransferase with bound GMP.

Eads, J.C.Scapin, G.Xu, Y.Grubmeyer, C.Sacchettini, J.C.

(1994) Cell 78: 325-334


  • PubMed Abstract: 
  • The crystal structure of HGPRTase with bound GMP has been determined and refined to 2.5 A resolution. The enzyme has a core alpha/beta structure resembling the nucleotide-binding fold of dehydrogenases, and a second lobe composed of residues from the ...

    The crystal structure of HGPRTase with bound GMP has been determined and refined to 2.5 A resolution. The enzyme has a core alpha/beta structure resembling the nucleotide-binding fold of dehydrogenases, and a second lobe composed of residues from the amino and carboxy termini. The GMP molecule binds in an anti conformation in a solvent-exposed cleft of the enzyme. Lys-165, which forms a hydrogen bond to O6 of GMP, appears to be critical for determining the specificity for guanine and hypoxanthine over adenine. The location of active site residues also provides evidence for a possible mechanism for general base-assisted HGPRTase catalysis. A rationalization of the effects on stability and activity of naturally occurring single amino acid mutations of HGPRTase is presented, including a discussion of several mutations at the active site that lead to Lesch-Nyhan syndrome.


    Related Citations: 
    • Crystal Structure of Orotate Phosphoribosyltransferase
      Scapin, G.,Grubmeyer, C.,Sacchettini, J.C.
      (1994) Biochemistry 33: 1287


    Organizational Affiliation

    Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYPOXANTHINE GUANINE PHOSPHORIBOSYL-TRANSFERASE
A, B
217Homo sapiensGene Names: HPRT1 (HPRT)
EC: 2.4.2.8
Find proteins for P00492 (Homo sapiens)
Go to Gene View: HPRT1
Go to UniProtKB:  P00492
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5GP
Query on 5GP

Download SDF File 
Download CCD File 
A, B
GUANOSINE-5'-MONOPHOSPHATE
C10 H14 N5 O8 P
RQFCJASXJCIDSX-UUOKFMHZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
5GPKi: 5800 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Work: 0.186 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 129.500α = 90.00
b = 66.450β = 90.00
c = 52.900γ = 90.00
Software Package:
Software NamePurpose
TNTrefinement
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-06-03
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance