X-131282984-C-A

Variant names:

• chrX-131282984-C-A
• rs5932877
• NM_001555.5:c.948G>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001555.5(IGSF1):​c.948G>T​(p.Val316Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. V316V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: IGSF1 NM_001555.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.27
• Publications: 13 publications found

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]

IGSF1 Gene-Disease associations (from GenCC):

• X-linked central congenital hypothyroidism with late-onset testicular enlargement

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet

ENSG00000287806 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.59).
• BP7: Synonymous conserved (PhyloP=-1.27 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001555.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGSF1	NM_001555.5	MANE Select	c.948G>T	p.Val316Val	synonymous	Exon 6 of 20	NP_001546.2
	IGSF1	NM_001170961.2		c.948G>T	p.Val316Val	synonymous	Exon 6 of 20	NP_001164432.1	Q8N6C5-4
	IGSF1	NM_001438811.1		c.948G>T	p.Val316Val	synonymous	Exon 7 of 21	NP_001425740.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGSF1	ENST00000361420.8	TSL:1 MANE Select	c.948G>T	p.Val316Val	synonymous	Exon 6 of 20	ENSP00000355010.3	Q8N6C5-1
	IGSF1	ENST00000370903.8	TSL:1	c.948G>T	p.Val316Val	synonymous	Exon 6 of 20	ENSP00000359940.3	Q8N6C5-4
	IGSF1	ENST00000370910.5	TSL:1	c.921G>T	p.Val307Val	synonymous	Exon 5 of 19	ENSP00000359947.1	Q8N6C5-2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.59
CADD	Benign	7.8
DANN	Benign	0.78
PhyloP100		-1.3
PromoterAI		0.020	Neutral

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

Other links and lift over

dbSNP: rs5932877; hg19: chrX-130416958;