Gene Gene information from NCBI Gene database.
Entrez ID 166785
Gene name Metabolism of cobalamin associated A
Gene symbol MMAA
Synonyms (NCBI Gene)
cblA
Chromosome 4
Chromosome location 4q31.21
Summary 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 mutas
SNPs SNP information provided by dbSNP.
58
SNP ID Visualize variation Clinical significance Consequence
rs104893846 C>T Pathogenic 5 prime UTR variant, stop gained, coding sequence variant
rs104893849 A>G Pathogenic Missense variant, coding sequence variant
rs104893851 C>T Pathogenic 5 prime UTR variant, stop gained, coding sequence variant
rs140356252 T>A,C Likely-pathogenic Missense variant, stop gained, coding sequence variant
rs150376474 G>A Pathogenic Coding sequence variant, missense variant
miRNA miRNA information provided by mirtarbase database.
217
miRTarBase ID miRNA Experiments Reference
MIRT1152712 hsa-miR-125a-3p CLIP-seq
MIRT1152713 hsa-miR-1276 CLIP-seq
MIRT1152714 hsa-miR-1297 CLIP-seq
MIRT1152715 hsa-miR-1302 CLIP-seq
MIRT1152716 hsa-miR-1305 CLIP-seq
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
23
GO ID Ontology Definition Evidence Reference
GO:0000166 Function Nucleotide binding IEA
GO:0003924 Function GTPase activity IBA
GO:0003924 Function GTPase activity IDA 20876572, 21138732, 28943303
GO:0003924 Function GTPase activity IEA
GO:0003924 Function GTPase activity IMP 28497574
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
607481 18871 ENSG00000151611
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
Q8IVH4
Protein name Methylmalonic aciduria type A protein, mitochondrial (EC 3.6.-.-)
Protein function GTPase, binds and hydrolyzes GTP (PubMed:20876572, PubMed:21138732, PubMed:28497574, PubMed:28943303). Involved in intracellular vitamin B12 metabolism, mediates the transport of cobalamin (Cbl) into mitochondria for the final steps of adenosylc
PDB 2WWW , 8GJU
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF03308 MeaB 101 384 Domain
Tissue specificity TISSUE SPECIFICITY: Widely expressed. Highest expression is observed in liver and skeletal muscle.
Sequence
Sequence length 418
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  Cobalamin transport and metabolism   Cobalamin (Cbl, vitamin B12) transport and metabolism
Defective MMAA causes methylmalonic aciduria type cblA
Defective MUT causes methylmalonic aciduria mut type
Propionyl-CoA catabolism
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
16
Evidence Score: ★☆☆☆☆  Gene-disease association found in Text Mining only ★★☆☆☆  Found in Text Mining and Unknown/Other Associations ★★★☆☆  Reported in Unknown/Other Associations across ≥2 Sources ★★★★☆  ClinVar: Pathogenic/Likely Pathogenic (<5 Variants) ★★★★★  ClinVar: Pathogenic/Likely Pathogenic (≥5 Variants)
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession Evidence Score
Methylmalonic acidemia Likely pathogenic; Pathogenic rs200577967, rs104893846, rs104893851, rs796051992, rs796051993, rs571038432, rs765799472, rs140356252, rs864309730, rs1728076436, rs1029096863, rs757548934, rs754973022, rs1553957931 RCV003388009
RCV003155012
RCV000587855
RCV001420837
RCV000780425
View all (9 more)
★★★★★
ClinVar: Pathogenic / Likely Pathogenic (≥5 Variants)
Methylmalonic aciduria of the cblA complementation type Likely pathogenic; Pathogenic rs1553957883 RCV001250250
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Methylmalonic aciduria, cblA type Pathogenic; Likely pathogenic rs398124552, rs200577967, rs1489525542, rs941689476, rs2126619930, rs760875006, rs2126617138, rs2126627182, rs1340736923, rs2126622813, rs2546339507, rs2546342963, rs2546337480, rs2546339598, rs2546339447
View all (103 more)
RCV000509023
RCV001386117
RCV001928572
RCV001974286
RCV002014753
View all (116 more)
★★★★★
ClinVar: Pathogenic / Likely Pathogenic (≥5 Variants)
MMAA-related disorder Likely pathogenic; Pathogenic rs2126622813, rs104893851, rs796051992, rs796051993 RCV003401788
RCV003421899
RCV003401020
RCV004752785
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Unknown / Other Associations ClinVar entries with uncertain/conflicting evidence, and associations from other databases (OMIM, Orphanet, GWAS, etc.) where the gene is not established as causal.
Phenotype Name Clinical Significance Source Evidence Score
Cataract Conflicting classifications of pathogenicity ClinVar
Disgenet
★★★☆☆
Reported in Unknown/Other Associations (≥2 sources)
Clear cell carcinoma of kidney Uncertain significance ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
DEFICIENCY ANEMIA GWAS catalog
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Lung cancer Uncertain significance ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Associations from Text Mining Disease associations identified through text mining
Disease Name Disease (Merged) Source PMID Relationship Type Evidence Score
Anemia Anemia HPO_DG
★☆☆☆☆
Found in Text Mining only
Colonic Neoplasms Colonic neoplasm Pubtator 33028275 Associate
★☆☆☆☆
Found in Text Mining only
Cystic Fibrosis Cystic Fibrosis BEFREE 11257549, 7532166
★☆☆☆☆
Found in Text Mining only
Dimauro disease Dimauro disease Pubtator 32754920 Associate
★☆☆☆☆
Found in Text Mining only
Global developmental delay Developmental Delay HPO_DG
★☆☆☆☆
Found in Text Mining only
Inborn Errors of Metabolism Inborn Errors Of Metabolism BEFREE 17728257
★☆☆☆☆
Found in Text Mining only
Intellectual Disability Intellectual developmental disorder Pubtator 33453710 Associate
★☆☆☆☆
Found in Text Mining only
Ketonuria Ketonuria HPO_DG
★☆☆☆☆
Found in Text Mining only
Ketosis Ketosis HPO_DG
★☆☆☆☆
Found in Text Mining only
Kidney Failure Chronic Kidney failure Pubtator 32754920 Inhibit
★☆☆☆☆
Found in Text Mining only