chr5-88804676-G-C

Variant names:

• chr5-88804676-G-C
• rs773278207
• NM_002397.5:c.180C>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_002397.5(MEF2C):​c.180C>G​(p.Thr60Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T60T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MEF2C NM_002397.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.206
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• neurodevelopmental disorder with hypotonia, stereotypic hand movements, and impaired language

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.68).
• BP7: Synonymous conserved (PhyloP=-0.206 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002397.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEF2C	NM_002397.5	MANE Select	c.180C>G	p.Thr60Thr	synonymous	Exon 3 of 11	NP_002388.2
	MEF2C	NM_001193347.1		c.180C>G	p.Thr60Thr	synonymous	Exon 4 of 12	NP_001180276.1
	MEF2C	NM_001193350.2		c.180C>G	p.Thr60Thr	synonymous	Exon 3 of 11	NP_001180279.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEF2C	ENST00000504921.7	TSL:1 MANE Select	c.180C>G	p.Thr60Thr	synonymous	Exon 3 of 11	ENSP00000421925.5
	MEF2C	ENST00000340208.9	TSL:1	c.180C>G	p.Thr60Thr	synonymous	Exon 4 of 12	ENSP00000340874.5
	MEF2C	ENST00000437473.6	TSL:1	c.180C>G	p.Thr60Thr	synonymous	Exon 3 of 11	ENSP00000396219.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.68
CADD	Benign	7.4
DANN	Benign	0.71
PhyloP100		-0.21
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7

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

Other links and lift over

dbSNP: rs773278207; hg19: chr5-88100493; COSMIC: COSV60928509; COSMIC: COSV60928509;