3-methylcrotonyl-CoA carboxylase deficiency
Last updated 1 Apr 2024
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3-methylcrotonyl-CoA carboxylase deficiency (also called MCC deficiency) is an inherited disorder in which the body is unable to process certain proteins. People with this disorder have a shortage of an enzyme that helps break down proteins that contain a particular building block (amino acid) called leucine.
Description
3-methylcrotonyl-CoA carboxylase deficiency (also called MCC deficiency) is an inherited disorder in which the body is unable to process certain proteins. People with this disorder have a shortage of an enzyme that helps break down proteins that contain a particular building block (amino acid) called leucine.
The signs and symptoms of MCC deficiency can vary among individuals, even among individuals in the same family. Some people with the genetic changes that cause MCC deficiency will not develop symptoms until adulthood, while many will never develop signs or symptoms.
Some affected individuals develop signs and symptoms in infancy or early childhood after an event such as an infection, a long period without food, or the introduction of a high-protein diet. Features of MCC deficiency may include feeding difficulties, delayed development, vomiting, excessive tiredness (lethargy), and weak muscle tone (hypotonia). If untreated, MCC deficiency can lead to seizures; breathing difficulties; and comas, which can be life-threatening.
Inheritance patterns
The source lists the following possible inheritance patterns: Autosomal recessive. More than one pattern can apply in different cases.
Related genes
Other names
3-MCC deficiency
3-methylcrotonylglycinuria
BMCC deficiency
Deficiency of methylcrotonoyl-CoA carboxylase
MCC deficiency
MCCD
Methylcrotonyl-CoA carboxylase deficiency
Methylcrotonyl-coenzyme A carboxylase deficiency
Further reading and references
- 3-methylcrotonyl-CoA carboxylase deficiency; MedlinePlus, National Library of Medicine.
- Arnold GL, Koeberl DD, Matern D, Barshop B, Braverman N, Burton B, Cederbaum S, Fiegenbaum A, Garganta C, Gibson J, Goodman SI, Harding C, Kahler S, Kronn D, Longo N. A Delphi-based consensus clinical practice protocol for the diagnosis and management of 3-methylcrotonyl CoA carboxylase deficiency. Mol Genet Metab. 2008 Apr;93(4):363-70. doi: 10.1016/j.ymgme.2007.11.002. Epub 2007 Dec 21.
- Baumgartner MR, Almashanu S, Suormala T, Obie C, Cole RN, Packman S, Baumgartner ER, Valle D. The molecular basis of human 3-methylcrotonyl-CoA carboxylase deficiency. J Clin Invest. 2001 Feb;107(4):495-504. doi: 10.1172/JCI11948.
- Forsyth R, Vockley CW, Edick MJ, Cameron CA, Hiner SJ, Berry SA, Vockley J, Arnold GL; Inborn Errors of Metabolism Collaborative. Outcomes of cases with 3-methylcrotonyl-CoA carboxylase (3-MCC) deficiency - Report from the Inborn Errors of Metabolism Information System. Mol Genet Metab. 2016 May;118(1):15-20. doi: 10.1016/j.ymgme.2016.02.002. Epub 2016 Feb 15.
- Gallardo ME, Desviat LR, Rodriguez JM, Esparza-Gordillo J, Perez-Cerda C, Perez B, Rodriguez-Pombo P, Criado O, Sanz R, Morton DH, Gibson KM, Le TP, Ribes A, de Cordoba SR, Ugarte M, Penalva MA. The molecular basis of 3-methylcrotonylglycinuria, a disorder of leucine catabolism. Am J Hum Genet. 2001 Feb;68(2):334-46. doi: 10.1086/318202. Epub 2001 Jan 17.
- Grunert SC, Stucki M, Morscher RJ, Suormala T, Burer C, Burda P, Christensen E, Ficicioglu C, Herwig J, Kolker S, Moslinger D, Pasquini E, Santer R, Schwab KO, Wilcken B, Fowler B, Yue WW, Baumgartner MR. 3-methylcrotonyl-CoA carboxylase deficiency: clinical, biochemical, enzymatic and molecular studies in 88 individuals. Orphanet J Rare Dis. 2012 May 29;7:31. doi: 10.1186/1750-1172-7-31.
- Holzinger A, Roschinger W, Lagler F, Mayerhofer PU, Lichtner P, Kattenfeld T, Thuy LP, Nyhan WL, Koch HG, Muntau AC, Roscher AA. Cloning of the human MCCA and MCCB genes and mutations therein reveal the molecular cause of 3-methylcrotonyl-CoA: carboxylase deficiency. Hum Mol Genet. 2001 Jun 1;10(12):1299-306. doi: 10.1093/hmg/10.12.1299.
- Shepard PJ, Barshop BA, Baumgartner MR, Hansen JB, Jepsen K, Smith EN, Frazer KA. Consanguinity and rare mutations outside of MCCC genes underlie nonspecific phenotypes of MCCD. Genet Med. 2015 Aug;17(8):660-7. doi: 10.1038/gim.2014.157. Epub 2014 Nov 6.
- Stadler SC, Polanetz R, Maier EM, Heidenreich SC, Niederer B, Mayerhofer PU, Lagler F, Koch HG, Santer R, Fletcher JM, Ranieri E, Das AM, Spiekerkotter U, Schwab KO, Potzsch S, Marquardt I, Hennermann JB, Knerr I, Mercimek-Mahmutoglu S, Kohlschmidt N, Liebl B, Fingerhut R, Olgemoller B, Muntau AC, Roscher AA, Roschinger W. Newborn screening for 3-methylcrotonyl-CoA carboxylase deficiency: population heterogeneity of MCCA and MCCB mutations and impact on risk assessment. Hum Mutat. 2006 Aug;27(8):748-59. doi: 10.1002/humu.20349.
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