rs1557339887

Positions:

• chrX-149500977-GGAT-G

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM2 PM4_Supporting PP5_Very_Strong

The NM_000202.8(IDS):​c.476_478del​(p.His159del) variant causes a inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: IDS NM_000202.8 inframe_deletion
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 8.97

Genes affected

IDS (HGNC:5389): (iduronate 2-sulfatase) This gene encodes a member of the sulfatase family of proteins. The encoded preproprotein is proteolytically processed to generate two polypeptide chains. This enzyme is involved in the lysosomal degradation of heparan sulfate and dermatan sulfate. Mutations in this gene are associated with the X-linked lysosomal storage disease mucopolysaccharidosis type II, also known as Hunter syndrome. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_000202.8. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant X-149500977-GGAT-G is Pathogenic according to our data. Variant chrX-149500977-GGAT-G is described in ClinVar as [Pathogenic]. Clinvar id is 437443.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IDS	NM_000202.8	c.476_478del	p.His159del	inframe_deletion	4/9	ENST00000340855.11	NP_000193.1
IDS	NM_001166550.4	c.206_208del	p.His69del	inframe_deletion	4/9		NP_001160022.1
IDS	NM_006123.5	c.476_478del	p.His159del	inframe_deletion	4/8		NP_006114.1
IDS	NR_104128.2	n.645_647del		non_coding_transcript_exon_variant	4/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IDS	ENST00000340855.11	c.476_478del	p.His159del	inframe_deletion	4/9	1	NM_000202.8	ENSP00000339801	P1

Frequencies

GnomAD3 genomes Cov.: 23

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Mucopolysaccharidosis, MPS-II Pathogenic:3

Pathogenic, criteria provided, single submitter	literature only	Laboratory of Diagnosis and Therapy of Lysosomal Disorders, University of Padova	Jun 07, 2024	Prevalence of the variant significantly increased in affected individuals compared with controls (PS4_Supporting), Absent from controls (or at low frequency) in gnomAD database (PM2_Moderate), Protein length changes in a nonrepeat region or stop–loss variants (PM4_Strong), Multiple lines of computational evidence support a deleterious effect (PP3_Supporting), Patient’s phenotype or family history highly specific for the disease (PP4_Moderate) -
Pathogenic, criteria provided, single submitter	clinical testing	Department of Medical Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Genomic Research Center, Shahid Beheshti University of Medical Sciences	Jun 07, 2017	- -

Computational scores

Source: dbNSFP v4.3

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

Other links and lift over

dbSNP: rs1557339887; hg19: chrX-148582508;