MMACHC
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Methylmalonic aciduria and homocystinuria type C protein also known as MMACHC is a protein that in humans is encoded by the MMACHC gene.[1]
Function
The C-terminal region of the product of the MMACHC gene is similar to TonB, a bacterial protein involved in energy transduction for cobalamin uptake.[1] The MMACHC gene product catalyzes the decyanation of cyanocobalamin as well as the dealkylation of alkylcobalamins including methylcobalamin and adenosylcobalamin.[2] This function has also been attributed to cobalamin reductases.[3] The MMACHC gene product and cobalamin reductases enable the interconversion of cyano- and alkylcobalamins.[4][5]
Clinical significance
Mutations are associated with methylmalonic acidemia.[1][6][7][8]
References
- ↑ 1.0 1.1 1.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Luciana Hannibal, Jihoe Kim, Nicola E. Brasch, Sihe Wang, David S. Rosenblatt, Ruma Banerjee, and Donald W. Jacobsen (August 2009). "Processing of alkylcobalamins in mammalian cells: a role for the MMACHC (cblC) gene product". Mol Genet Metab. 2009 Aug; 97(4): 260–266.
- ↑ Watanabe F, Nakano Y. "Purification and characterization of aquacobalamin reductases from mammals". Methods Enzymol. 1997;281;295-305.
- ↑ Quadros EV, Jackson B, Hoffbrand AV, Linnell JC. "Interconversion of cobalamins in human lymphocytes in vitro and the influence of nitrous oxide on the synthesis of cobalamin coenzymes". Vitamin B12, Proceedings of the Third European Symposium on Vitamin B12 and Intrinsic Factor. 1979;1045-1054.
- ↑ Quadros, EV. "Advances in the Understanding of Cobalamin Assimilation and Metabolism". Br J Haematol. 2010 Jan; 148(2): 195–204.
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Further reading
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External links
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