7TOE

Structure of G6PD-WT tetramer with no symmetry imposed


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Allosteric role of a structural NADP + molecule in glucose-6-phosphate dehydrogenase activity.

Wei, X.Kixmoeller, K.Baltrusaitis, E.Yang, X.Marmorstein, R.

(2022) Proc Natl Acad Sci U S A 119: e2119695119-e2119695119

  • DOI: https://doi.org/10.1073/pnas.2119695119
  • Primary Citation of Related Structures:  
    7SNF, 7SNG, 7SNH, 7SNI, 7TOE, 7TOF, 7UAL, 7UC2

  • PubMed Abstract: 

    Human glucose-6-phosphate dehydrogenase (G6PD) is the main cellular source of NADPH, and thus plays a key role in maintaining reduced glutathione to protect cells from oxidative stress disorders such as hemolytic anemia. G6PD is a multimeric enzyme that uses the cofactors β-D-glucose 6-phosphate (G6P) and "catalytic" NADP + (NADP + c), as well as a "structural" NADP + (NADP + s) located ∼25 Å from the active site, to generate NADPH. While X-ray crystallographic and biochemical studies have revealed a role for NADP + s in maintaining the catalytic activity by stabilizing the multimeric G6PD conformation, other potential roles for NADP + s have not been evaluated. Here, we determined the high resolution cryo-electron microscopy structures of human wild-type G6PD in the absence of bound ligands and a catalytic G6PD-D200N mutant bound to NADP + c and NADP + s in the absence or presence of G6P. A comparison of these structures, together with previously reported structures, reveals that the unliganded human G6PD forms a mixture of dimers and tetramers with similar overall folds, and binding of NADP + s induces a structural ordering of a C-terminal extension region and allosterically regulates G6P binding and catalysis. These studies have implications for understanding G6PD deficiencies and for therapy of G6PD-mediated disorders.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, PA, 19104.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glucose-6-phosphate 1-dehydrogenase
A, B, C, D
523Homo sapiensMutation(s): 0 
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
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-14
    Type: Initial release
  • Version 1.1: 2024-06-05
    Changes: Data collection