rs397509364

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3PP5

The NM_015702.3(MMADHC):​c.696+3_696+6delGAGT variant causes a splice region, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

Frequency

Genomes: not found (cov: 32)

Consequence

MMADHC
NM_015702.3 splice_region, intron

Scores

Not classified

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 8.79
Variant links:
Genes affected
MMADHC (HGNC:25221): (metabolism of cobalamin associated D) This gene encodes a mitochondrial protein that is involved in an early step of vitamin B12 metabolism. Vitamin B12 (cobalamin) is essential for normal development and survival in humans. Mutations in this gene cause methylmalonic aciduria and homocystinuria type cblD (MMADHC), a disorder of cobalamin metabolism that is characterized by decreased levels of the coenzymes adenosylcobalamin and methylcobalamin. Pseudogenes have been identified on chromosomes 11 and X.[provided by RefSeq, Nov 2008]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PP3
Multiple lines of computational evidence support a deleterious effect 2: max_spliceai, phyloP100way_vertebrate [when was below the threshold]
PP5
Variant 2-149571078-TACTC-T is Pathogenic according to our data. Variant chr2-149571078-TACTC-T is described in ClinVar as [Pathogenic]. Clinvar id is 769.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
MMADHCNM_015702.3 linkuse as main transcriptc.696+3_696+6delGAGT splice_region_variant, intron_variant ENST00000303319.10 NP_056517.1 Q9H3L0

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
MMADHCENST00000303319.10 linkuse as main transcriptc.696+3_696+6delGAGT splice_region_variant, intron_variant 1 NM_015702.3 ENSP00000301920.5 Q9H3L0
MMADHCENST00000422782.2 linkuse as main transcriptc.798+3_798+6delGAGT splice_region_variant, intron_variant 5 ENSP00000408331.2 F8WEC0
MMADHCENST00000428879.5 linkuse as main transcriptc.696+3_696+6delGAGT splice_region_variant, intron_variant 2 ENSP00000389060.1 Q9H3L0

Frequencies

GnomAD3 genomes
Cov.:
32
We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: no assertion criteria provided
LINK: link

Submissions by phenotype

Methylmalonic aciduria and homocystinuria type cblD Pathogenic:1
Pathogenic, no assertion criteria providedliterature onlyOMIMApr 03, 2008- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.85
Details are displayed if max score is > 0.2
DS_DL_spliceai
0.85
Position offset: 7

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs397509364; hg19: chr2-150427592; API