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Open data
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Basic information
Entry | Database: PDB / ID: 7sni | ||||||
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Title | Structure of G6PD-D200N tetramer bound to NADP+ and G6P | ||||||
![]() | Glucose-6-phosphate 1-dehydrogenase | ||||||
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Function / homology | ![]() negative regulation of protein glutathionylation / pentose biosynthetic process / ribose phosphate biosynthetic process / glucose-6-phosphate dehydrogenase (NADP+) / positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Wei, X. / Marmorstein, R. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Allosteric role of a structural NADP molecule in glucose-6-phosphate dehydrogenase activity. Authors: Xuepeng Wei / Kathryn Kixmoeller / Elana Baltrusaitis / Xiaolu Yang / Ronen Marmorstein / ![]() 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 ...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 (NADPc), as well as a "structural" NADP (NADPs) located ∼25 Å from the active site, to generate NADPH. While X-ray crystallographic and biochemical studies have revealed a role for NADPs in maintaining the catalytic activity by stabilizing the multimeric G6PD conformation, other potential roles for NADPs 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 NADPc and NADPs 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 NADPs 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. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 360.1 KB | Display | ![]() |
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PDB format | ![]() | 298.5 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 25227MC ![]() 7snfC ![]() 7sngC ![]() 7snhC ![]() 7toeC ![]() 7tofC ![]() 7ualC ![]() 7uc2C M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 60402.762 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() References: UniProt: P11413, glucose-6-phosphate dehydrogenase (NADP+) #2: Chemical | ChemComp-NAP / ![]() #3: Sugar | ChemComp-BG6 / #4: Water | ChemComp-HOH / | ![]() Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: G6PD protein![]() |
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Molecular weight | Value: 0.11 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() |
Vitrification![]() | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() |
Image recording | Electron dose: 40 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.19.2_4158: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 67823 / Symmetry type: POINT | ||||||||||||||||||||||||
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