Genetic Variant NM_138401.4:c.503G>A (chr19-17423587-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_138401.4(MVB12A):c.503G>A(p.Gly168Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,762 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/17 in silico tools predict 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. G168V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MVB12A
NM_138401.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.63

Publications

0 publications found

Variant links:

Genes affected

MVB12A (HGNC:25153): (multivesicular body subunit 12A) Enables lipid binding activity and ubiquitin binding activity. Involved in regulation of epidermal growth factor receptor signaling pathway; viral budding; and virus maturation. Located in several cellular components, including Golgi apparatus; centrosome; and nucleoplasm. Part of ESCRT I complex. [provided by Alliance of Genome Resources, Apr 2022]

MVB12A links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.14956295).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_138401.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MVB12A	NM_138401.4	MANE Select	c.503G>A	p.Gly168Asp	missense	Exon 5 of 9	NP_612410.1	Q96EY5-1
	MVB12A	NM_001304547.2		c.227G>A	p.Gly76Asp	missense	Exon 6 of 10	NP_001291476.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MVB12A	ENST00000317040.12	TSL:1 MANE Select	c.503G>A	p.Gly168Asp	missense	Exon 5 of 9	ENSP00000324810.6	Q96EY5-1
MVB12A	ENST00000529939.5	TSL:3	c.503G>A	p.Gly168Asp	missense	Exon 5 of 8	ENSP00000432526.1	E9PQA6
MVB12A	ENST00000875213.1		c.440G>A	p.Gly147Asp	missense	Exon 4 of 8	ENSP00000545272.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461762

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727178

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53322

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111998

Other (OTH)

AF:

0.0000166

AC:

AN:

60394

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.099

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.42

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.023

Eigen

Benign

-0.53

Eigen_PC

Benign

-0.47

FATHMM_MKL

Benign

0.25

LIST_S2

Benign

0.46

M_CAP

Benign

0.0090

MetaRNN

Benign

0.15

MetaSVM

Benign

-1.0

PhyloP100

1.6

PROVEAN

Benign

-0.35

REVEL

Benign

0.023

Sift

Benign

0.15

Vest4

0.25

MutPred

0.34

Loss of MoRF binding (P = 0.1023)

MVP

0.35

ClinPred

0.10

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.069

Mutation Taster

=90/10

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over