chr15-74411901-G-A

Position:

• chr15-74411901-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003612.5(SEMA7A):​c.1406C>T​(p.Ser469Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000143 in 1,613,800 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: SEMA7A NM_003612.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.392

Genes affected

SEMA7A (HGNC:10741): (semaphorin 7A (JohnMiltonHagen blood group)) This gene encodes a member of the semaphorin family of proteins. The encoded preproprotein is proteolytically processed to generate the mature glycosylphosphatidylinositol (GPI)-anchored membrane glycoprotein. The encoded protein is found on activated lymphocytes and erythrocytes and may be involved in immunomodulatory and neuronal processes. The encoded protein carries the John Milton Hagen (JMH) blood group antigens. Mutations in this gene may be associated with reduced bone mineral density (BMD). Alternative splicing results in multiple transcript variants, at least one of which encodes an isoform that is proteolytically processed. [provided by RefSeq, Feb 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1053825).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SEMA7A	NM_003612.5	c.1406C>T	p.Ser469Leu	missense_variant	11/14	ENST00000261918.9
SEMA7A	NM_001146029.3	c.1364C>T	p.Ser455Leu	missense_variant	10/13
SEMA7A	NM_001146030.3	c.911C>T	p.Ser304Leu	missense_variant	11/14
SEMA7A	XM_047433177.1	c.1283C>T	p.Ser428Leu	missense_variant	11/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEMA7A	ENST00000261918.9	c.1406C>T	p.Ser469Leu	missense_variant	11/14	1	NM_003612.5	P1
SEMA7A	ENST00000543145.6	c.1364C>T	p.Ser455Leu	missense_variant	10/13	2
SEMA7A	ENST00000542748.6	c.911C>T	p.Ser304Leu	missense_variant	11/14	5

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152214 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000279 AC: 7 AN: 250984 Hom.: 0 AF XY: 0.0000368 AC XY: 5 AN XY: 135778

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000882

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000137 AC: 20 AN: 1461586 Hom.: 0 Cov.: 33 AF XY: 0.0000179 AC XY: 13 AN XY: 727094

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000162

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152214 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74366

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000264

ExAC AF: 0.0000247 AC: 3

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 25, 2022

The c.1406C>T (p.S469L) alteration is located in exon 11 (coding exon 11) of the SEMA7A gene. This alteration results from a C to T substitution at nucleotide position 1406, causing the serine (S) at amino acid position 469 to be replaced by a leucine (L). 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	0.094
BayesDel_addAF	Benign	-0.47	T
BayesDel_noAF	Benign	-0.65
CADD	Benign	20
DANN	Uncertain	0.98
DEOGEN2	Benign	0.053	T;T;.
Eigen	Benign	-0.71
Eigen_PC	Benign	-0.58
FATHMM_MKL	Benign	0.24	N
LIST_S2	Benign	0.76	T;T;T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.11	T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	-1.6	N;.;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.40	T
PROVEAN	Benign	1.6	N;N;N
REVEL	Benign	0.056
Sift	Benign	0.43	T;T;T
Sift4G	Benign	0.73	T;T;T
Polyphen		0.27	B;.;.
Vest4		0.27
MutPred		0.62		Loss of sheet (P = 0.0181);.;.;
MVP		0.24
MPC		0.45
ClinPred		0.055	T
GERP RS		2.5
Varity_R		0.11
gMVP		0.54

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: rs775757047; hg19: chr15-74704242;