MMAA

Methylmalonic aciduria type A protein, mitochondrial also known as MMAA is a protein that in humans is encoded by the MMAA gene.[5]

For other uses, see MMAA (disambiguation).

MMAA
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2WWW
Identifiers
Aliases	MMAA, cblA, methylmalonic aciduria (cobalamin deficiency) cblA type, metabolism of cobalamin associated A
External IDs	OMIM: 607481 MGI: 1923805 HomoloGene: 14586 GeneCards: MMAA
Gene location (Human) Chr. Chromosome 4 (human)[1] Band 4q31.21 Start 145,599,042 bp[1] End 145,660,033 bp[1]
Gene location (Mouse) Chr. Chromosome 8 (mouse)[2] Band 8|8 C1 Start 79,263,598 bp[2] End 79,294,937 bp[2]
Gene ontology Molecular function • nucleotide binding • hydrolase activity • GTPase activity • GO:0001948 protein binding • GTP binding • identical protein binding • protein homodimerization activity Cellular component • mitochondrial matrix • mitochondrion • intracellular Biological process • cobalamin metabolic process • Cobalamin biosynthesis • short-chain fatty acid catabolic process • phosphorelay signal transduction system • signal transduction • signal transduction by protein phosphorylation Sources:Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	166785	109136
Ensembl	ENSG00000151611	ENSMUSG00000037022
UniProt	Q8IVH4 Q495G5	Q8C7H1
RefSeq (mRNA)	NM_172250 NM_001375644	NM_133823 NM_001363470 NM_001363471 NM_001363472
RefSeq (protein)	NP_758454	NP_598584 NP_001350399 NP_001350400 NP_001350401
Location (UCSC)	Chr 4: 145.6 – 145.66 Mb	Chr 8: 79.26 – 79.29 Mb
PubMed search	[3]	[4]
Wikidata
View/Edit Human View/Edit Mouse

Function

The protein encoded by this gene is involved in the translocation of cobalamin into the mitochondrion, where it is used in the final steps of adenosylcobalamin synthesis. Adenosylcobalamin is a coenzyme required for the activity of methylmalonyl-CoA mutase.[6]

Clinical significance

Mutations in the MMAA gene are associated with methylmalonic acidemia.[5][7]

References

1. GRCh38: Ensembl release 89: ENSG00000151611 - Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000037022 - Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. Dobson CM, Wai T, Leclerc D, Wilson A, Wu X, Doré C, Hudson T, Rosenblatt DS, Gravel RA (November 2002). "Identification of the gene responsible for the cblA complementation group of vitamin B12-responsive methylmalonic acidemia based on analysis of prokaryotic gene arrangements". Proc. Natl. Acad. Sci. U.S.A. 99 (24): 15554–9. doi:10.1073/pnas.242614799. PMC 137755. PMID 12438653.
6. "Entrez Gene: MMAA methylmalonic aciduria (cobalamin deficiency) cblA type".
7. Lerner-Ellis JP, Dobson CM, Wai T, Watkins D, Tirone JC, Leclerc D, Doré C, Lepage P, Gravel RA, Rosenblatt DS (December 2004). "Mutations in the MMAA gene in patients with the cblA disorder of vitamin B12 metabolism". Hum. Mutat. 24 (6): 509–16. doi:10.1002/humu.20104. PMID 15523652.

External links

• GeneReviews/NCBI/NIH/UW entry on Methylmalonic Acidemia

Further reading

• Padovani D, Labunska T, Banerjee R (2006). "Energetics of interaction between the G-protein chaperone, MeaB, and B12-dependent methylmalonyl-CoA mutase". J. Biol. Chem. 281 (26): 17838–44. doi:10.1074/jbc.M600047200. PMID 16641088.
• 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.
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
• Yang X, Sakamoto O, Matsubara Y, et al. (2004). "Mutation analysis of the MMAA and MMAB genes in Japanese patients with vitamin B(12)-responsive methylmalonic acidemia: identification of a prevalent MMAA mutation". Mol. Genet. Metab. 82 (4): 329–33. doi:10.1016/j.ymgme.2004.05.002. PMID 15308131.
• Merinero B, Pérez B, Pérez-Cerdá C, et al. (2008). "Methylmalonic acidaemia: examination of genotype and biochemical data in 32 patients belonging to mut, cblA or cblB complementation group". J. Inherit. Metab. Dis. 31 (1): 55–66. doi:10.1007/s10545-007-0667-y. PMID 17957493.
• 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. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Hörster F, Baumgartner MR, Viardot C, et al. (2007). "Long-term outcome in methylmalonic acidurias is influenced by the underlying defect (mut0, mut-, cblA, cblB)". Pediatr. Res. 62 (2): 225–30. doi:10.1203/PDR.0b013e3180a0325f. PMID 17597648.
• Honjo RS, Casella EB, Vieira MA, et al. (2009). "Spondylocostal dysostosis associated with methylmalonic aciduria". Genet Test Mol Biomarkers. 13 (2): 181–3. doi:10.1089/gtmb.2008.0069. PMID 19371216.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.