X-38675736-A-G

Position:

• chrX-38675736-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_004615.4(TSPAN7):​c.473A>G​(p.Asn158Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: TSPAN7 NM_004615.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.06

Genes affected

TSPAN7 (HGNC:11854): (tetraspanin 7) The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Most of these members are cell-surface proteins that are characterized by the presence of four hydrophobic domains. The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility. This encoded protein is a cell surface glycoprotein and may have a role in the control of neurite outgrowth. It is known to complex with integrins. This gene is associated with X-linked cognitive disability and neuropsychiatric diseases such as Huntington's chorea, fragile X syndrome and myotonic dystrophy. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a glycosylation_site N-linked (GlcNAc...) asparagine (size 0) in uniprot entity TSN7_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30427435).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TSPAN7	NM_004615.4	c.473A>G	p.Asn158Ser	missense_variant	5/8	ENST00000378482.7	NP_004606.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSPAN7	ENST00000378482.7	c.473A>G	p.Asn158Ser	missense_variant	5/8	1	NM_004615.4	ENSP00000367743	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 23

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

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Oct 13, 2023

Variant summary: TSPAN7 c.473A>G (p.Asn158Ser) results in a conservative amino acid change located in the Tetraspanin-6/7, EC2 domain (IPR048232) of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant was absent in 182992 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.473A>G in individuals affected with Intellectual Disability, X-Linked 58 and no experimental evidence demonstrating its impact on protein function have been reported. No submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.097
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.22	.;T;.
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Uncertain	0.95	D;D;D
M_CAP	Uncertain	0.14	D
MetaRNN	Benign	0.30	T;T;T
MetaSVM	Benign	-0.85	T
MutationAssessor	Benign	-0.36	.;N;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-0.55	N;N;N
REVEL	Benign	0.24
Sift	Benign	0.076	T;T;T
Sift4G	Benign	0.30	T;T;T
Polyphen		0.0030	.;B;B
Vest4		0.22
MVP		0.45
MPC		0.48
ClinPred		0.82	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.18
gMVP		0.65

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-38534990;