X-131275004-A-T

Position:

• chrX-131275004-A-T

Variant summary

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

The NM_001555.5(IGSF1):​c.3467T>A​(p.Val1156Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: IGSF1 NM_001555.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.98

Genes affected

IGSF1 (HGNC:5948): (immunoglobulin superfamily member 1) This gene encodes a member of the immunoglobulin-like domain-containing superfamily. Proteins in this superfamily contain varying numbers of immunoglobulin-like domains and are thought to participate in the regulation of interactions between cells. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jan 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IGSF1	NM_001555.5	c.3467T>A	p.Val1156Glu	missense_variant	17/20	ENST00000361420.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IGSF1	ENST00000361420.8	c.3467T>A	p.Val1156Glu	missense_variant	17/20	1	NM_001555.5	P4

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

X-linked central congenital hypothyroidism with late-onset testicular enlargement Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

3billion

May 22, 2022

The variant is not observed in the gnomAD v2.1.1 dataset. Missense variant within the extracellular domain of the IGSF1 C-terminal domain (PMID: 23143598). In silico tool predictions suggest no damaging effect of the variant on gene or gene product (REVEL: 0.34; 3Cnet: 0.17). Therefore, this variant is classified as uncertain significanceaccording to the recommendation of ACMG/AMP guideline. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.66	.;D;.;.
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.73	.;T;T;T
M_CAP	Uncertain	0.24	D
MetaRNN	Uncertain	0.68	D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Pathogenic	3.7	.;H;.;.
MutationTaster	Benign	0.93	D;D;D;D
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-3.8	D;D;D;D
REVEL	Uncertain	0.34
Sift	Uncertain	0.0040	D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D
Polyphen		0.38	B;D;.;B
Vest4		0.39
MutPred		0.77		.;Gain of disorder (P = 0.0019);.;.;
MVP		0.75
MPC		0.96
ClinPred		0.99	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.70
gMVP		0.94

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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-130408978;