Sandbox Reserved 1094
From Proteopedia
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It also has a role in protecting cells from destruction because it produces a cofactor NADPH which plays a role in protecting cells from reactive oxygen species. | It also has a role in protecting cells from destruction because it produces a cofactor NADPH which plays a role in protecting cells from reactive oxygen species. | ||
- | == | + | == Genomic context == |
+ | It is coded by the G6PD gene (1461 nucleotides). | ||
- | == | + | == Catalytic activity == |
+ | D-glucose 6-phosphate + NAD+ → 6-phospho-D-glucono-1,5-lactone + H+ + NADH | ||
+ | KM=114 µM for G6PD (with NADP), KM=69 µM for G6PD (with NAD), | ||
+ | KM=8.0 µM for NADP, KM=160 µM for NAD | ||
+ | Its regulation depends on the concentration of substrate and coenzyme, rate limiting step in pentose phosphate pathway. | ||
+ | |||
+ | == Optimal activity conditions == | ||
+ | Optimum pH is 5.4 - 8.9. | ||
+ | |||
+ | == Evolutionary conservation == | ||
+ | We will keep the interactivity that exist on the page: a box can be checked to observe the different structures conserved evolutionary. | ||
+ | |||
+ | == Mutations == | ||
+ | Mutagenesis inducing catalytic activity loss: +200 mutations have been identified. A change of amino acids leads to disruption of the normal | ||
+ | structure/function/reduce the expression of enzymes. | ||
== Structural highlights == | == Structural highlights == | ||
+ | It is formed of a homodimer (dimer of two identical monomers). | ||
+ | Depending on several conditions, it can dimerize to form tetramers. Each monomer in the complex has a substrate binding site that binds to G6P, and a catalytic coenzyme binding site that binds to NADP+/NADPH using the Rossman fold. | ||
+ | |||
This is a sample scene created with SAT to <scene name="/12/3456/Sample/1">color</scene> by Group, and another to make <scene name="/12/3456/Sample/2">a transparent representation</scene> of the protein. You can make your own scenes on SAT starting from scratch or loading and editing one of these sample scenes. | This is a sample scene created with SAT to <scene name="/12/3456/Sample/1">color</scene> by Group, and another to make <scene name="/12/3456/Sample/2">a transparent representation</scene> of the protein. You can make your own scenes on SAT starting from scratch or loading and editing one of these sample scenes. |
Revision as of 15:03, 8 January 2020
This Sandbox is Reserved from 25/11/2019, through 30/9/2020 for use in the course "Structural Biology" taught by Bruno Kieffer at the University of Strasbourg, ESBS. This reservation includes Sandbox Reserved 1091 through Sandbox Reserved 1115. |
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Glucose-6-Phosphate Dehydrogenase from Leuconostoc mesenteroides
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References
- ↑ Hanson, R. M., Prilusky, J., Renjian, Z., Nakane, T. and Sussman, J. L. (2013), JSmol and the Next-Generation Web-Based Representation of 3D Molecular Structure as Applied to Proteopedia. Isr. J. Chem., 53:207-216. doi:http://dx.doi.org/10.1002/ijch.201300024
- ↑ Herraez A. Biomolecules in the computer: Jmol to the rescue. Biochem Mol Biol Educ. 2006 Jul;34(4):255-61. doi: 10.1002/bmb.2006.494034042644. PMID:21638687 doi:10.1002/bmb.2006.494034042644