Variant 19-19146306-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001145785.2(MEF2B):c.848G>T(p.Gly283Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000907 in 1,344,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000095 ( 0 hom. )

Consequence

MEF2B
NM_001145785.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.321

Variant links:

Genes affected

MEF2B (HGNC:6995): (myocyte enhancer factor 2B) The product of this gene is a member of the MADS/MEF2 family of DNA binding proteins. The protein is thought to regulate gene expression, including expression of the smooth muscle myosin heavy chain gene. This region undergoes considerable alternative splicing, with transcripts supporting two non-overlapping loci (GeneID 729991 and 100271849) as well as numerous read-through transcripts that span both loci (annotated as GeneID 4207). Several isoforms of this protein are expressed from either this locus or from some of the read-through transcripts annotated on GeneID 4207. [provided by RefSeq, Jan 2014]

MEF2B links:

BORCS8-MEF2B (HGNC:):

BORCS8-MEF2B links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.067086905).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MEF2B	NM_001145785.2 linkuse as main transcript	c.848G>T	p.Gly283Val	missense_variant	8/9	ENST00000424583.7
BORCS8-MEF2B	NR_027308.2 linkuse as main transcript	n.1235+249G>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MEF2B	ENST00000424583.7 linkuse as main transcript	c.848G>T	p.Gly283Val	missense_variant	8/9	5	NM_001145785.2	P4	Q02080-2

Frequencies

GnomAD3 genomes

AF:

0.0000593

AC:

AN:

151864

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000947

AC:

113

AN:

1192976

Hom.:

Cov.:

AF XY:

0.0000956

AC XY:

AN XY:

575154

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:

0.00

Gnomad4 NFE exome

AF:

0.000114

Gnomad4 OTH exome

AF:

0.0000402

GnomAD4 genome

AF:

0.0000593

AC:

AN:

151864

Hom.:

Cov.:

AF XY:

0.0000809

AC XY:

AN XY:

74166

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000843

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 04, 2022

The c.848G>T (p.G283V) alteration is located in exon 8 (coding exon 7) of the MEF2B gene. This alteration results from a G to T substitution at nucleotide position 848, causing the glycine (G) at amino acid position 283 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.024

BayesDel_noAF

Benign

-0.27

Cadd

Benign

Dann

Benign

0.96

DEOGEN2

Benign

0.018

T;.;.

Eigen

Benign

-0.89

Eigen_PC

Benign

-0.91

FATHMM_MKL

Benign

0.00081

LIST_S2

Benign

0.68

T;T;T

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.067

T;T;T

MetaSVM

Benign

-0.70

MutationTaster

Benign

1.0

N;N;N;N;N;N

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-0.68

N;N;N

REVEL

Benign

0.18

Sift

Uncertain

0.0040

D;T;T

Sift4G

Benign

0.16

T;T;T

Polyphen

0.014

B;.;B

Vest4

0.16

MutPred

0.094

.;.;Gain of solvent accessibility (P = 0.1133);

MVP

0.31

ClinPred

0.14

GERP RS

0.99

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.090

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over