5-88722635-C-G

Position:

• chr5-88722635-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_002397.5(MEF2C):​c.1391G>C​(p.Arg464Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. R464R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MEF2C NM_002397.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.55

Genes affected

MEF2C (HGNC:6996): (myocyte enhancer factor 2C) This locus encodes a member of the MADS box transcription enhancer factor 2 (MEF2) family of proteins, which play a role in myogenesis. The encoded protein, MEF2 polypeptide C, has both trans-activating and DNA binding activities. This protein may play a role in maintaining the differentiated state of muscle cells. Mutations and deletions at this locus have been associated with severe cognitive disability, stereotypic movements, epilepsy, and cerebral malformation. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jul 2010]

MEF2C-AS2 (HGNC:53115): (MEF2C antisense RNA 2)

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MEF2C. . Gene score misZ 3.9523 (greater than the threshold 3.09). Trascript score misZ 4.8218 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability, autosomal dominant 20, complex neurodevelopmental disorder.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.841

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MEF2C	NM_002397.5	c.1391G>C	p.Arg464Pro	missense_variant	11/11	ENST00000504921.7
MEF2C-AS2	NR_146284.1	n.267C>G		non_coding_transcript_exon_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MEF2C	ENST00000504921.7	c.1391G>C	p.Arg464Pro	missense_variant	11/11	1	NM_002397.5
MEF2C-AS2	ENST00000657578.1	n.232-39362C>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 15, 2023

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	34
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	D;.;.;T;.;.;D;T;.;T;.;.;.;D;T;.;.;.;.
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	.;D;.;D;.;D;.;D;.;D;.;D;.;D;D;D;D;D;D
M_CAP	Pathogenic	0.34	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Uncertain	2.7	M;.;.;.;.;.;M;.;.;.;.;.;.;M;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.6	D;D;D;.;.;.;D;.;.;.;.;D;.;.;.;.;.;.;.
REVEL	Uncertain	0.64
Sift	Uncertain	0.0020	D;D;D;.;.;.;D;.;.;.;.;D;.;.;.;.;.;.;.
Sift4G	Uncertain	0.0020	D;D;D;.;.;D;D;D;D;D;.;D;D;.;D;D;.;D;D
Polyphen		1.0	D;.;.;.;.;.;D;.;.;.;.;.;D;D;.;D;.;.;.
Vest4		0.64
MutPred		0.36		Loss of MoRF binding (P = 0.0053);.;.;.;.;.;Loss of MoRF binding (P = 0.0053);.;.;.;.;.;.;Loss of MoRF binding (P = 0.0053);.;.;.;.;.;
MVP		0.96
MPC		3.1
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.92
gMVP		0.71

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-88018452;