Variant 12-109573425-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The ENST00000545712.7(MMAB):c.56G>T(p.Arg19Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,456,116 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R19H) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

MMAB
ENST00000545712.7 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.26

Variant links:

Genes affected

MMAB (HGNC:19331): (metabolism of cobalamin associated B) This gene encodes a protein that catalyzes the final step in the conversion of vitamin B(12) into adenosylcobalamin (AdoCbl), a vitamin B12-containing coenzyme for methylmalonyl-CoA mutase. Mutations in the gene are the cause of vitamin B12-dependent methylmalonic aciduria linked to the cblB complementation group. Alternatively spliced transcript variants have been found. [provided by RefSeq, Apr 2011]

MMAB links:

MVK (HGNC:7530): (mevalonate kinase) This gene encodes the peroxisomal enzyme mevalonate kinase. Mevalonate is a key intermediate, and mevalonate kinase a key early enzyme, in isoprenoid and sterol synthesis. Mevalonate kinase deficiency caused by mutation of this gene results in mevalonic aciduria, a disease characterized psychomotor retardation, failure to thrive, hepatosplenomegaly, anemia and recurrent febrile crises. Defects in this gene also cause hyperimmunoglobulinaemia D and periodic fever syndrome, a disorder characterized by recurrent episodes of fever associated with lymphadenopathy, arthralgia, gastrointestinal dismay and skin rash. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

MVK links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.31525356).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
MMAB	NM_052845.4 linkuse as main transcript	c.56G>T	p.Arg19Leu	missense_variant	1/9	ENST00000545712.7	NP_443077.1
MVK	XM_047428873.1 linkuse as main transcript	c.140C>A	p.Ala47Glu	missense_variant	1/11		XP_047284829.1
MVK	XM_017019313.3 linkuse as main transcript	c.-161C>A		5_prime_UTR_variant	1/10		XP_016874802.1
MMAB	NR_038118.2 linkuse as main transcript	n.80G>T		non_coding_transcript_exon_variant	1/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MMAB	ENST00000545712.7 linkuse as main transcript	c.56G>T	p.Arg19Leu	missense_variant	1/9	1	NM_052845.4	ENSP00000445920	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000427

AC:

AN:

234330

Hom.:

AF XY:

0.00000777

AC XY:

AN XY:

128630

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000503

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1456116

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

724268

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000196

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Uncertain

0.0

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.14

T;.;T

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.21

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.77

T;T;T

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.32

T;T;T

MetaSVM

Benign

-0.55

MutationAssessor

Benign

1.8

L;.;.

MutationTaster

Benign

1.0

D;N

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-0.62

N;.;.

REVEL

Uncertain

0.47

Sift

Uncertain

0.0060

D;.;.

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

0.65

P;.;.

Vest4

0.33

MutPred

0.26

Loss of MoRF binding (P = 5e-04);Loss of MoRF binding (P = 5e-04);Loss of MoRF binding (P = 5e-04);

MVP

0.90

MPC

0.40

ClinPred

0.63

GERP RS

3.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over