Methylmalonic Aciduria And Homocystinuria, Cblc Type; Mahcc
Description
Combined methylmalonic aciduria (MMA) and homocystinuria is a genetically heterogeneous disorder of cobalamin (cbl; vitamin B12) metabolism. The defect causes decreased levels of the coenzymes adenosylcobalamin (AdoCbl) and methylcobalamin (MeCbl), which results in decreased activity of the respective enzymes methylmalonyl-CoA mutase (MUT ) and methyltetrahydrofolate:homocysteine methyltransferase, also known as methionine synthase (MTR ). Different forms of the disorder have been classified according to complementation groups of cells in vitro: cblC, cblD (OMIM ), cblF (OMIM ), and cblJ (OMIM ).Isolated methylmalonic acidurias have also been classified by complementation groups: MMA 'mut' (OMIM ) is caused by mutation in the MUT gene on chromosome 6p21; MMA cblA (OMIM ) is caused by mutation in the MMAA gene (OMIM ) on 4q31; and MMA cblB (OMIM ) is caused by mutation in the MMAB gene (OMIM ) on 12q24.Methylmalonic aciduria and homocystinuria, cblC type, is the most common inborn error of vitamin B12 (cobalamin) metabolism, with about 250 known cases (Lerner-Ellis et al., 2006). Affected individuals may have developmental, hematologic, neurologic, metabolic, ophthalmologic, and dermatologic clinical findings. Although considered a disease of infancy or childhood, some individuals develop symptoms in adulthood (Rosenblatt et al., 1997).
Genes related to Methylmalonic Aciduria And Homocystinuria, Cblc Type; Mahcc
- PRDX1
- MMACHC
Clinical Features
Top most frequent phenotypes and symptoms related to Methylmalonic Aciduria And Homocystinuria, Cblc Type; Mahcc
- Intellectual disability
- Seizures
- Global developmental delay
- Generalized hypotonia
- Hearing impairment
- Microcephaly
- Ataxia
- Growth delay
- Nystagmus
- Failure to thrive
And another 94 symptoms. If you need more information about this disease we can help you.
Incidence and onset information
— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)— No data available about the known clinical features onset.
Alternative names
Methylmalonic Aciduria And Homocystinuria, Cblc Type; Mahcc Is also known as vitamin b12 metabolic defect with combined deficiency of methylmalonyl-coa mutase and homocysteine:methyltetrahydrofolate methyltransferase, methylmalonic aciduria and homocystinuria, vitamin b12-responsive, methylmalonic acidemia and homocystinuria, cblc t.
Researches and researchers
Currently, we don't have any information about doctors, researches or researchers related to this disease. Please contact us if you would like to appear here.Methylmalonic Aciduria And Homocystinuria, Cblc Type; Mahcc Recommended genes panels
Panel Name, Specifity and genes Tested/covered |
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PRDX1.
By Fulgent Genetics Fulgent Genetics (United States).
PRDX1
Specificity
100 %
Genes
50 % |
MitoMet®Plus aCGH Analysis.
By Baylor Miraca Genetics Laboratories (United States).
RGS9, RHO, GRK1, RLBP1, RNASEL, BCS1L, RP1, RP2, RP9, RPE65, RPGR, RPL35A, MRPL3, RPS14, RS1, SAG, SARDH, SCO2, SCP2, SDHB , (...)
View the complete list with 612 more genes
Specificity
1 %
Genes
50 % |
MMACHC Deletion/Duplication Analysis.
By Baylor Miraca Genetics Laboratories (United States).
MMACHC
Specificity
100 %
Genes
50 % |
MMACHC Comprehensive - Sequence & Deletion/Duplication Analysis.
By Baylor Miraca Genetics Laboratories (United States).
MMACHC
Specificity
100 %
Genes
50 % |
MMACHC Sequence Analysis.
By Baylor Miraca Genetics Laboratories (United States).
MMACHC
Specificity
100 %
Genes
50 % |
MMACHC Sequence Analysis (Prenatal Diagnosis).
By Baylor Miraca Genetics Laboratories (United States).
MMACHC
Specificity
100 %
Genes
50 % |
Cobalamin Metabolism Panel (MitomeNGS).
By Baylor Miraca Genetics Laboratories (United States).
TCN2, MMAA, MMAB, LMBRD1, MMACHC, MMADHC, MTR, MTRR, MMUT
Specificity
12 %
Genes
50 % |
GeneAware Complete Panel Version 2 (Female).
By Baylor Miraca Genetics Laboratories (United States).
RMRP, BCS1L, SACS, BLM, SGCA, SGCB, SGCG, SGSH, SLC12A6, SLC17A5, SLC22A5, SLC25A13, SLC25A15, SLC26A2, SLC35A3, SLC7A7, SMN1, SMPD1, BTD, BTK , (...)
View the complete list with 139 more genes
Specificity
1 %
Genes
50 % |
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Learn moreSources and references
You can check the following sources for additional information.
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