chr15-99674405-C-T

Variant names:

• chr15-99674405-C-T
• rs748952164
• NM_001319206.4:c.403C>T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_Moderate BS2_Supporting

The NM_001319206.4(MEF2A):​c.403C>T​(p.Pro135Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000186 in 1,609,356 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00011 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: MEF2A NM_001319206.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.00

Genes affected

MEF2A (HGNC:6993): (myocyte enhancer factor 2A) The protein encoded by this gene is a DNA-binding transcription factor that activates many muscle-specific, growth factor-induced, and stress-induced genes. The encoded protein can act as a homodimer or as a heterodimer and is involved in several cellular processes, including muscle development, neuronal differentiation, cell growth control, and apoptosis. Defects in this gene could be a cause of autosomal dominant coronary artery disease 1 with myocardial infarction (ADCAD1). Several transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jan 2010]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.19527656).
• BS2: High AC in GnomAd4 at 17 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MEF2A	NM_001319206.4	c.403C>T	p.Pro135Ser	missense_variant	Exon 6 of 12	ENST00000557942.6	NP_001306135.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MEF2A	ENST00000557942.6	c.403C>T	p.Pro135Ser	missense_variant	Exon 6 of 12	5	NM_001319206.4	ENSP00000453095.1

Frequencies

GnomAD3 genomes AF: 0.000112 AC: 17 AN: 152194 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000386

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000202 AC: 5 AN: 247772 Hom.: 0 AF XY: 0.0000223 AC XY: 3 AN XY: 134338

Gnomad AFR exome AF: 0.000129

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000167

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000892 AC: 13 AN: 1457162 Hom.: 0 Cov.: 31 AF XY: 0.00000967 AC XY: 7 AN XY: 723968

Gnomad4 AFR exome AF: 0.000150

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000758

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.02e-7

Gnomad4 OTH exome AF: 0.0000664

GnomAD4 genome AF: 0.000112 AC: 17 AN: 152194 Hom.: 0 Cov.: 32 AF XY: 0.0000672 AC XY: 5 AN XY: 74358

Gnomad4 AFR AF: 0.000386

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000192

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000793

ExAC AF: 0.0000248 AC: 3

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jun 21, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.409C>T (p.P137S) alteration is located in exon 6 (coding exon 4) of the MEF2A gene. This alteration results from a C to T substitution at nucleotide position 409, causing the proline (P) at amino acid position 137 to be replaced by a serine (S). 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	-0.068	T
BayesDel_noAF	Uncertain	-0.070
CADD	Uncertain	23
DANN	Uncertain	1.0
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.34
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D;D;D;.;D;D
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.20	T;T;T;T;T;T
MetaSVM	Benign	-0.47	T
MutationAssessor	Benign	1.2	L;.;.;.;.;.
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-2.2	N;N;N;N;N;N
REVEL	Uncertain	0.31
Sift	Benign	0.11	T;T;T;T;T;T
Sift4G	Benign	0.44	T;T;T;T;T;T
Polyphen		0.063	B;.;B;B;.;B
Vest4		0.32
MutPred		0.31		Loss of catalytic residue at P136 (P = 0.0117);.;.;.;.;.;
MVP		0.44
MPC		0.89
ClinPred		0.67	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.23

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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

Other links and lift over

dbSNP: rs748952164; hg19: chr15-100214610;