15-74410628-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_003612.5(SEMA7A):c.1997A>C(p.His666Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000279 in 1,431,872 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: not found (cov: 32)

Exomes 𝑓: 0.0000028 ( 0 hom. )

Consequence

SEMA7A
NM_003612.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.983

Variant links:

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]

SEMA7A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.22155878).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SEMA7A	NM_003612.5 linkuse as main transcript	c.1997A>C	p.His666Pro	missense_variant	14/14	ENST00000261918.9
SEMA7A	NM_001146029.3 linkuse as main transcript	c.1955A>C	p.His652Pro	missense_variant	13/13
SEMA7A	NM_001146030.3 linkuse as main transcript	c.1502A>C	p.His501Pro	missense_variant	14/14
SEMA7A	XM_047433177.1 linkuse as main transcript	c.1874A>C	p.His625Pro	missense_variant	14/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEMA7A	ENST00000261918.9 linkuse as main transcript	c.1997A>C	p.His666Pro	missense_variant	14/14	1	NM_003612.5	P1	O75326-1
SEMA7A	ENST00000543145.6 linkuse as main transcript	c.1955A>C	p.His652Pro	missense_variant	13/13	2			O75326-2
SEMA7A	ENST00000542748.6 linkuse as main transcript	c.1502A>C	p.His501Pro	missense_variant	14/14	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000427

AC:

AN:

234376

Hom.:

AF XY:

0.00000792

AC XY:

AN XY:

126214

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000371

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000279

AC:

AN:

1431872

Hom.:

Cov.:

AF XY:

0.00000283

AC XY:

AN XY:

707850

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:

0.0000485

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 05, 2024

The c.1997A>C (p.H666P) alteration is located in exon 14 (coding exon 14) of the SEMA7A gene. This alteration results from a A to C substitution at nucleotide position 1997, causing the histidine (H) at amino acid position 666 to be replaced by a proline (P). 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

0.081

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.29

Cadd

Benign

Dann

Benign

0.97

DEOGEN2

Benign

0.081

T;T;.

Eigen

Benign

0.10

Eigen_PC

Benign

0.15

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.72

T;T;T

M_CAP

Benign

0.019

MetaRNN

Benign

0.22

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.97

L;.;.

MutationTaster

Benign

0.95

D;D;D

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-0.58

N;N;N

REVEL

Benign

0.12

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

0.85

P;.;.

Vest4

0.51

MutPred

0.33

Gain of loop (P = 0.0435);.;.;

MVP

0.67

MPC

0.72

ClinPred

0.47

GERP RS

4.3

Varity_R

0.23

gMVP

0.79

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