7-80798179-C-T

Position:

• chr7-80798179-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The ENST00000265361.8(SEMA3C):​c.1044G>A​(p.Val348=) 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. V348V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SEMA3C ENST00000265361.8 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.128

Genes affected

SEMA3C (HGNC:10725): (semaphorin 3C) This gene encodes a secreted glycoprotein that belongs to the semaphorin class 3 family of neuronal guidance cues. The encoded protein contains an N-terminal sema domain, integrin and immunoglobulin-like domains, and a C-terminal basic domain. Homodimerization and proteolytic cleavage of the C-terminal propeptide are necessary for the function of the encoded protein. It binds a neuropilin co-receptor before forming a heterotrimeric complex with an associated plexin. An increase in the expression of this gene correlates with an increase in cancer cell invasion and adhesion. Naturally occurring mutations in this gene are associated with Hirschsprung disease. [provided by RefSeq, May 2017]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.24).
• BP7: Synonymous conserved (PhyloP=0.128 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SEMA3C	NM_006379.5	c.1044G>A	p.Val348=	synonymous_variant	11/18	ENST00000265361.8	NP_006370.1
SEMA3C	NM_001350120.2	c.1098G>A	p.Val366=	synonymous_variant	11/18		NP_001337049.1
SEMA3C	NM_001350121.2	c.870G>A	p.Val290=	synonymous_variant	12/19		NP_001337050.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SEMA3C	ENST00000265361.8	c.1044G>A	p.Val348=	synonymous_variant	11/18	1	NM_006379.5	ENSP00000265361	P1
SEMA3C	ENST00000419255.6	c.1044G>A	p.Val348=	synonymous_variant	11/18	2		ENSP00000411193	P1
SEMA3C	ENST00000475955.1	n.60G>A		non_coding_transcript_exon_variant	1/2	4
SEMA3C	ENST00000458729.5	c.*577G>A		3_prime_UTR_variant, NMD_transcript_variant	8/9	2		ENSP00000393825

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.24
CADD	Benign	7.3
DANN	Benign	0.78

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

LitVar

Other links and lift over

dbSNP: rs1880959; hg19: chr7-80427495;