Genetic Variant SEMA3C:p.Tyr729Cys (chr7-80744964-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_006379.5(SEMA3C):c.2186A>G(p.Tyr729Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000186 in 1,614,008 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 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SEMA3C
NM_006379.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.89

Variant links:

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]

SEMA3C links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.32587782).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SEMA3C	NM_006379.5 link	c.2186A>G	p.Tyr729Cys	missense_variant	Exon 18 of 18	ENST00000265361.8	NP_006370.1	Q99985-1
SEMA3C	NM_001350120.2 link	c.2240A>G	p.Tyr747Cys	missense_variant	Exon 18 of 18		NP_001337049.1
SEMA3C	NM_001350121.2 link	c.2012A>G	p.Tyr671Cys	missense_variant	Exon 19 of 19		NP_001337050.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SEMA3C	ENST00000265361.8 link	c.2186A>G	p.Tyr729Cys	missense_variant	Exon 18 of 18	1	NM_006379.5	ENSP00000265361.3		Q99985-1
SEMA3C	ENST00000419255.6 link	c.2186A>G	p.Tyr729Cys	missense_variant	Exon 18 of 18	2		ENSP00000411193.2		Q99985-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461794

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727198

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152214

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74366

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 26, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2186A>G (p.Y729C) alteration is located in exon 18 (coding exon 17) of the SEMA3C gene. This alteration results from a A to G substitution at nucleotide position 2186, causing the tyrosine (Y) at amino acid position 729 to be replaced by a cysteine (C). 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

AlphaMissense

Benign

0.29

BayesDel_addAF

Benign

-0.070

BayesDel_noAF

Benign

-0.34

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.089

T;T

Eigen

Uncertain

0.33

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.93

.;D

M_CAP

Benign

0.012

MetaRNN

Benign

0.33

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.4

L;L

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.45

N;N

REVEL

Benign

0.11

Sift

Benign

0.18

T;T

Sift4G

Benign

0.10

T;T

Polyphen

0.90

P;P

Vest4

0.40

MVP

0.41

MPC

0.50

ClinPred

0.82

GERP RS

5.4

Varity_R

0.18

gMVP

0.43

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

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