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The deficiency of glucose‑6‑phosphate dehydrogenase (G6PD) is one of the most common inborn errors of metabolism worldwide. This congenital disorder generally results from mutations that are spread throughout the entire gene of G6PD. Three single-point mutations for G6PD have been reported in the Mexican population and named Veracruz (Arg365His), G6PD Seattle (Asp282His), and G6PD Mexico DF (Thr65Ala), whose biochemical characterization have not yet been studied. For this reason, in this work we analyzed the putative role of the three mutations to uncover the functional consequences on G6PD activity. To this end, was developed a method to clone, overexpress, and purify recombinant human G6PD. The results obtained from all variants showed a loss of catalysis by 80 to 97% and had a decrease in affinity for both physiological substrates with respect to the wild type (WT) G6PD. Our results also showed that the three mutations affected three-dimensional structure and protein stability, suggesting an unstable structure with low conformational stability that affected its G6PD functionality. Finally, based on the biochemical characterization of the unclassified G6PD Mexico DF, we suggest that this variant could be grouped as a Class I variant, because biochemical data are similar with other Class I G6PDs.
This article was published in the following journal.
Name: International journal of biological macromolecules
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A glucose dehydrogenase that catalyzes the oxidation of beta-D-glucose to form D-glucono-1,5-lactone, using NAD as well as NADP as a coenzyme.
An NAD-dependent glyceraldehyde-3-phosphate dehydrogenase found in the cytosol of eucaryotes. It catalyses the dehydrogenation and phosphorylation of GLYCERALDEHYDE 3-PHOSPHATE to 3-phospho-D-glyceroyl phosphate, which is an important step in the GLYCOLYSIS pathway.
An ester of glucose with phosphoric acid, made in the course of glucose metabolism by mammalian and other cells. It is a normal constituent of resting muscle and probably is in constant equilibrium with fructose-6-phosphate. (Stedman, 26th ed)
An enzyme of the oxidoreductase class that catalyzes the reaction 6-phospho-D-gluconate and NADP+ to yield D-ribulose 5-phosphate, carbon dioxide, and NADPH. The reaction is a step in the pentose phosphate pathway of glucose metabolism. (From Dorland, 27th ed) EC 18.104.22.168.
An ATP-dependent enzyme that catalyzes the addition of ADP to alpha-D-glucose 1-phosphate to form ADP-glucose and diphosphate. The reaction is the rate-limiting reaction in prokaryotic GLYCOGEN and plant STARCH biosynthesis.
Cloning in biology is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually. Cloning in biotechnology refers to processes used to cre...
Congenital conditions are those which are present from birth. They include structural deformities or loss of function in organs such as the <!--LGfEGNT2Lhm-->heart, gut or skeletal system. They can be corrected by <!--LGfEGNT2Lhm-->surgery, m...
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...