15-74411926-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_003612.5(SEMA7A):c.1381C>T(p.Arg461Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00011 in 1,613,928 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Affects (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R461H) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000099 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00011 (0 hom.)
• Consequence: SEMA7A NM_003612.5 missense
• Clinical Significance: Affects no assertion criteria provided O:1
• Conservation: PhyloP100: 0.975

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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.032054543).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SEMA7A	NM_003612.5	c.1381C>T	p.Arg461Cys	missense_variant	11/14	ENST00000261918.9
SEMA7A	NM_001146029.3	c.1339C>T	p.Arg447Cys	missense_variant	10/13
SEMA7A	NM_001146030.3	c.886C>T	p.Arg296Cys	missense_variant	11/14
SEMA7A	XM_047433177.1	c.1258C>T	p.Arg420Cys	missense_variant	11/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEMA7A	ENST00000261918.9	c.1381C>T	p.Arg461Cys	missense_variant	11/14	1	NM_003612.5	P1
SEMA7A	ENST00000543145.6	c.1339C>T	p.Arg447Cys	missense_variant	10/13	2
SEMA7A	ENST00000542748.6	c.886C>T	p.Arg296Cys	missense_variant	11/14	5

Frequencies

GnomAD3 genomes AF: 0.0000985 AC: 15 AN: 152242 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00317

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000127 AC: 32 AN: 251186 Hom.: 0 AF XY: 0.000169 AC XY: 23 AN XY: 135870

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00218

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000705

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000111 AC: 162 AN: 1461686 Hom.: 0 Cov.: 33 AF XY: 0.000133 AC XY: 97 AN XY: 727146

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00253

Gnomad4 EAS exome AF: 0.0000756

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000376

Gnomad4 NFE exome AF: 0.0000737

Gnomad4 OTH exome AF: 0.000132

GnomAD4 genome AF: 0.0000985 AC: 15 AN: 152242 Hom.: 0 Cov.: 32 AF XY: 0.000108 AC XY: 8 AN XY: 74384

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00317

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000180 Hom.: 0

Bravo AF: 0.0000945

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.0000659 AC: 8

EpiCase AF: 0.00

EpiControl AF: 0.000178

ClinVar

Significance: Affects

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

John Milton Hagen blood group system Other:1

Affects, no assertion criteria provided

literature only

OMIM

Jan 01, 2007

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.29
Cadd	Pathogenic	28
Dann	Uncertain	1.0
DEOGEN2	Benign	0.36	T;T;.
Eigen	Benign	-0.11
Eigen_PC	Benign	-0.13
FATHMM_MKL	Benign	0.18	N
LIST_S2	Uncertain	0.86	D;D;D
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.032	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L;.;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.26	T
PROVEAN	Uncertain	-2.9	D;D;D
REVEL	Benign	0.14
Sift	Benign	0.030	D;D;D
Sift4G	Uncertain	0.0050	D;D;D
Polyphen		1.0	D;.;.
Vest4		0.74
MVP		0.43
MPC		0.72
ClinPred		0.068	T
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.29
gMVP		0.55

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: rs56001514; hg19: chr15-74704267;