7-83367614-C-A

Position:

• chr7-83367614-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BS2

The NM_012431.3(SEMA3E):​c.2300G>T​(p.Arg767Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: SEMA3E NM_012431.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 5.18

Genes affected

SEMA3E (HGNC:10727): (semaphorin 3E) Semaphorins are a large family of conserved secreted and membrane associated proteins which possess a semaphorin (Sema) domain and a PSI domain (found in plexins, semaphorins and integrins) in the N-terminal extracellular portion. Based on sequence and structural similarities, semaphorins are put into eight classes: invertebrates contain classes 1 and 2, viruses have class V, and vertebrates contain classes 3-7. Semaphorins serve as axon guidance ligands via multimeric receptor complexes, some (if not all) containing plexin proteins. This gene encodes a class 4 semaphorin. This gene encodes a class 3 semaphorin. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SEMA3E	NM_012431.3	c.2300G>T	p.Arg767Leu	missense_variant	17/17	ENST00000643230.2	NP_036563.1
SEMA3E	NM_001178129.2	c.2120G>T	p.Arg707Leu	missense_variant	17/17		NP_001171600.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SEMA3E	ENST00000643230.2	c.2300G>T	p.Arg767Leu	missense_variant	17/17		NM_012431.3	ENSP00000496491	P1
SEMA3E	ENST00000643441.1	n.2285G>T		non_coding_transcript_exon_variant	17/17

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461870 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727236

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: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000282 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

CHARGE syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 29, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with SEMA3E-related conditions. This variant is present in population databases (rs746701899, gnomAD 0.0009%). This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 767 of the SEMA3E protein (p.Arg767Leu). -

SEMA3E-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 16, 2024

The SEMA3E c.2300G>T variant is predicted to result in the amino acid substitution p.Arg767Leu. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.76
BayesDel_addAF	Benign	-0.012	T
BayesDel_noAF	Benign	-0.25
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.59	D;D;.
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.73
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.89	.;D;D
M_CAP	Benign	0.048	D
MetaRNN	Uncertain	0.59	D;D;D
MetaSVM	Benign	-0.53	T
MutationAssessor	Pathogenic	3.0	M;M;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Benign	0.42	T
PROVEAN	Uncertain	-3.3	D;.;D
REVEL	Uncertain	0.31
Sift	Uncertain	0.0020	D;.;D
Sift4G	Uncertain	0.0050	D;.;D
Polyphen		1.0	D;D;.
Vest4		0.45
MutPred		0.56		Loss of MoRF binding (P = 2e-04);Loss of MoRF binding (P = 2e-04);.;
MVP		0.86
MPC		0.77
ClinPred		0.97	D
GERP RS		5.6
Varity_R		0.51
gMVP		0.60

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: rs746701899; hg19: chr7-82996930;