Methylmalonic aciduria and homocystinuria type C protein (MMACHC) is a protein that in humans is encoded by the MMACHC gene.[5]
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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.[5] The MMACHC gene product catalyzes the decyanation of cyanocobalamin as well as the dealkylation
of alkylcobalamins including methylcobalamin and adenosylcobalamin.[6] This function has also been attributed to cobalamin reductases.[7] The MMACHC gene product and cobalamin reductases enable the interconversion of cyano- and alkylcobalamins.[8][9]
Mutations are associated with combined homocystinuria and methylmalonic acidemia.[5][10][11][12][13]
Lerner-Ellis JP, Tirone JC, Pawelek PD, Doré C, Atkinson JL, Watkins D, Morel CF, Fujiwara TM, Moras E, Hosack AR, Dunbar GV, Antonicka H, Forgetta V, Dobson CM, Leclerc D, Gravel RA, Shoubridge EA, Coulton JW, Lepage P, Rommens JM, Morgan K, Rosenblatt DS (January 2006). "Identification of the gene responsible for methylmalonic aciduria and homocystinuria, cblC type". Nat. Genet. 38 (1): 93–100. doi:10.1038/ng1683. PMID 16311595. S2CID 7688576. 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.
Morel CF, Lerner-Ellis JP, Rosenblatt DS (August 2006). "Combined methylmalonic aciduria and homocystinuria (cblC): phenotype-genotype correlations and ethnic-specific observations". Mol. Genet. Metab. 88 (4): 315–21. doi:10.1016/j.ymgme.2006.04.001. PMID 16714133. Tsai AC, Morel CF, Scharer G, Yang M, Lerner-Ellis JP, Rosenblatt DS, Thomas JA (October 2007). "Late-onset combined homocystinuria and methylmalonic aciduria (cblC) and neuropsychiatric disturbance". Am. J. Med. Genet. A. 143A (20): 2430–4. doi:10.1002/ajmg.a.31932. PMID 17853453. S2CID 19372503. Sloan, Jennifer L.; Carrillo, Nuria; Adams, David; Venditti, Charles P. (1993), Adam, Margaret P.; Feldman, Jerry; Mirzaa, Ghayda M.; Pagon, Roberta A. (eds.), "Disorders of Intracellular Cobalamin Metabolism", GeneReviews®, Seattle (WA): University of Washington, Seattle, PMID 20301503, retrieved 2024-02-24
- Froese DS, Zhang J, Healy S, Gravel RA (2009). "Mechanism of vitamin B12-responsiveness in cblC methylmalonic aciduria with homocystinuria". Mol. Genet. Metab. 98 (4): 338–43. doi:10.1016/j.ymgme.2009.07.014. PMID 19700356.
- Tang H, Hao H, Tang SH, et al. (2009). "[Mutation analysis of the MMACHC gene in a pedigree with methylmalonic aciduria]". Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 26 (1): 62–5. doi:10.3760/cma.j.issn.1003-9406.2009.01.014 (inactive 2024-04-26). PMID 19199254.
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- Profitlich LE, Kirmse B, Wasserstein MP, et al. (2009). "High prevalence of structural heart disease in children with cblC-type methylmalonic aciduria and homocystinuria". Mol. Genet. Metab. 98 (4): 344–8. doi:10.1016/j.ymgme.2009.07.017. PMID 19767224.
- Nogueira C, Aiello C, Cerone R, et al. (2008). "Spectrum of MMACHC mutations in Italian and Portuguese patients with combined methylmalonic aciduria and homocystinuria, cblC type". Mol. Genet. Metab. 93 (4): 475–80. doi:10.1016/j.ymgme.2007.11.005. PMID 18164228.
- Gregory SG, Barlow KF, McLay KE, et al. (2006). "The DNA sequence and biological annotation of human chromosome 1". Nature. 441 (7091): 315–21. Bibcode:2006Natur.441..315G. doi:10.1038/nature04727. PMID 16710414. S2CID 4431933.
- Lerner-Ellis JP, Anastasio N, Liu J, et al. (2009). "Spectrum of mutations in MMACHC, allelic expression, and evidence for genotype-phenotype correlations". Hum. Mutat. 30 (7): 1072–81. doi:10.1002/humu.21001. PMID 19370762. S2CID 2767341.
- Hannibal L, Kim J, Brasch NE, et al. (2009). "Processing of alkylcobalamins in mammalian cells: A role for the MMACHC (cblC) gene product". Mol. Genet. Metab. 97 (4): 260–6. doi:10.1016/j.ymgme.2009.04.005. PMC 2709701. PMID 19447654.
- Thauvin-Robinet C, Roze E, Couvreur G, et al. (2008). "The adolescent and adult form of cobalamin C disease: clinical and molecular spectrum". J. Neurol. Neurosurg. Psychiatry. 79 (6): 725–8. doi:10.1136/jnnp.2007.133025. PMID 18245139. S2CID 23493993.
- Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
- Kim J, Hannibal L, Gherasim C, et al. (2009). "A human vitamin B12 trafficking protein uses glutathione transferase activity for processing alkylcobalamins". J. Biol. Chem. 284 (48): 33418–24. doi:10.1074/jbc.M109.057877. PMC 2785186. PMID 19801555.
- Richard E, Jorge-Finnigan A, Garcia-Villoria J, et al. (2009). "Genetic and cellular studies of oxidative stress in methylmalonic aciduria (MMA) cobalamin deficiency type C (cblC) with homocystinuria (MMACHC)". Hum. Mutat. 30 (11): 1558–66. doi:10.1002/humu.21107. PMID 19760748. S2CID 42657972.
- Strausberg RL, Feingold EA, Grouse LH, et al. (2002). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
- Loewy AD, Niles KM, Anastasio N, et al. (2009). "Epigenetic modification of the gene for the vitamin B(12) chaperone MMACHC can result in increased tumorigenicity and methionine dependence". Mol. Genet. Metab. 96 (4): 261–7. doi:10.1016/j.ymgme.2008.12.011. PMID 19200761.
- Kim J, Gherasim C, Banerjee R (2008). "Decyanation of vitamin B12 by a trafficking chaperone". Proc. Natl. Acad. Sci. U.S.A. 105 (38): 14551–4. Bibcode:2008PNAS..10514551K. doi:10.1073/pnas.0805989105. PMC 2567227. PMID 18779575.