6VA9

Crystal structure of glucose-6-phosphate dehydrogenase R393H mutant in complex with catalytic NADP+


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.95 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Long-range structural defects by pathogenic mutations in most severe glucose-6-phosphate dehydrogenase deficiency.

Horikoshi, N.Hwang, S.Gati, C.Matsui, T.Castillo-Orellana, C.Raub, A.G.Garcia, A.A.Jabbarpour, F.Batyuk, A.Broweleit, J.Xiang, X.Chiang, A.Broweleit, R.Vohringer-Martinez, E.Mochly-Rosen, D.Wakatsuki, S.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: https://doi.org/10.1073/pnas.2022790118
  • Primary Citation of Related Structures:  
    6VA0, 6VA7, 6VA8, 6VA9, 6VAQ

  • PubMed Abstract: 

    Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most common blood disorder, presenting multiple symptoms, including hemolytic anemia. It affects 400 million people worldwide, with more than 160 single mutations reported in G6PD. The most severe mutations (about 70) are classified as class I, leading to more than 90% loss of activity of the wild-type G6PD. The crystal structure of G6PD reveals these mutations are located away from the active site, concentrating around the noncatalytic NADP + -binding site and the dimer interface. However, the molecular mechanisms of class I mutant dysfunction have remained elusive, hindering the development of efficient therapies. To resolve this, we performed integral structural characterization of five G6PD mutants, including four class I mutants, associated with the noncatalytic NADP + and dimerization, using crystallography, small-angle X-ray scattering (SAXS), cryogenic electron microscopy (cryo-EM), and biophysical analyses. Comparisons with the structure and properties of the wild-type enzyme, together with molecular dynamics simulations, bring forward a universal mechanism for this severe G6PD deficiency due to the class I mutations. We highlight the role of the noncatalytic NADP + -binding site that is crucial for stabilization and ordering two β-strands in the dimer interface, which together communicate these distant structural aberrations to the active site through a network of additional interactions. This understanding elucidates potential paths for drug development targeting G6PD deficiency.


  • Organizational Affiliation

    Life Science Center for Survival Dynamics, University of Tsukuba, Ibaraki 305-8577, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glucose-6-phosphate 1-dehydrogenase515Homo sapiensMutation(s): 1 
Gene Names: G6PD
EC: 1.1.1.49
UniProt & NIH Common Fund Data Resources
Find proteins for P11413 (Homo sapiens)
Explore P11413 
Go to UniProtKB:  P11413
PHAROS:  P11413
GTEx:  ENSG00000160211 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11413
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAP (Subject of Investigation/LOI)
Query on NAP

Download Ideal Coordinates CCD File 
B [auth A]NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.95 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 157.435α = 90
b = 157.435β = 90
c = 113.022γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/Eunice Kennedy Shriver National Institute of Child Health & Human Development (NIH/NICHD)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2021-01-27
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Data collection, Database references, Refinement description