NM_000202.8:c.998C>A

Variant names:

• chrX-149490322-G-T
• rs104894853
• NM_000202.8:c.998C>A

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000202.8(IDS):​c.998C>A​(p.Ser333*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. S333S) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: IDS NM_000202.8 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 9.21
• Publications: 32 publications found

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]

IDS Gene-Disease associations (from GenCC):

• mucopolysaccharidosis type 2

  Inheritance: XL, AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, Genomics England PanelApp, PanelApp Australia, Myriad Women’s Health
• mucopolysaccharidosis type 2, attenuated form

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• mucopolysaccharidosis type 2, severe form

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000241489 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-149490322-G-T is Pathogenic according to our data. Variant chrX-149490322-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 988688.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000202.8. 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
	IDS	NM_000202.8	MANE Select	c.998C>A	p.Ser333*	stop_gained	Exon 7 of 9	NP_000193.1
	IDS	NM_001166550.4		c.728C>A	p.Ser243*	stop_gained	Exon 7 of 9	NP_001160022.1
	IDS	NM_006123.5		c.998C>A	p.Ser333*	stop_gained	Exon 7 of 8	NP_006114.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IDS	ENST00000340855.11	TSL:1 MANE Select	c.998C>A	p.Ser333*	stop_gained	Exon 7 of 9	ENSP00000339801.6
	IDS	ENST00000370441.8	TSL:1	c.998C>A	p.Ser333*	stop_gained	Exon 7 of 8	ENSP00000359470.4
	ENSG00000241489	ENST00000651111.1		c.365C>A	p.Ser122*	stop_gained	Exon 12 of 14	ENSP00000498395.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1096751 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 362139

African (AFR) AF: 0.00 AC: 0 AN: 26374

American (AMR) AF: 0.00 AC: 0 AN: 35206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19372

East Asian (EAS) AF: 0.00 AC: 0 AN: 30201

South Asian (SAS) AF: 0.00 AC: 0 AN: 54114

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40513

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4129

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 840801

Other (OTH) AF: 0.00 AC: 0 AN: 46041

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
2	-	-	Mucopolysaccharidosis, MPS-II (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.55
CADD	Pathogenic	36
DANN	Uncertain	0.99
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		9.2
Vest4		0.96
GERP RS		4.8
Mutation Taster		=4/196	disease causing (ClinVar)

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: rs104894853; hg19: chrX-148571853;