X-131274771-G-T

Variant names:

• chrX-131274771-G-T
• rs6529473
• NM_001555.5:c.3579C>A

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.3579C>A​(p.Val1193Val) 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. V1193V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 22)
• Consequence: IGSF1 NM_001555.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.731
• Publications: 10 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: Ambry Genetics, Orphanet, G2P, Labcorp Genetics (formerly Invitae)

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=-0.6).
• BP7: Synonymous conserved (PhyloP=0.731 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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGSF1	NM_001555.5	MANE Select	c.3579C>A	p.Val1193Val	synonymous	Exon 18 of 20	NP_001546.2
	IGSF1	NM_001170961.2		c.3594C>A	p.Val1198Val	synonymous	Exon 18 of 20	NP_001164432.1
	IGSF1	NM_001438811.1		c.3594C>A	p.Val1198Val	synonymous	Exon 19 of 21	NP_001425740.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGSF1	ENST00000361420.8	TSL:1 MANE Select	c.3579C>A	p.Val1193Val	synonymous	Exon 18 of 20	ENSP00000355010.3
	IGSF1	ENST00000370903.8	TSL:1	c.3594C>A	p.Val1198Val	synonymous	Exon 18 of 20	ENSP00000359940.3
	IGSF1	ENST00000370910.5	TSL:1	c.3552C>A	p.Val1184Val	synonymous	Exon 17 of 19	ENSP00000359947.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.60
CADD	Benign	7.8
DANN	Benign	0.64
PhyloP100		0.73
PromoterAI		-0.0088	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: rs6529473; hg19: chrX-130408745;