chrX-149503473-G-A

Variant names:

• chrX-149503473-G-A
• rs1557340280
• NM_000202.8:c.257C>T

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PM1 PM2 PM5 PP3 PP5_Very_Strong

The NM_000202.8(IDS):​c.257C>T​(p.Pro86Leu) variant causes a missense 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. 13/23 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P86R) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 22)
• Consequence: IDS NM_000202.8 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 9.42
• Publications: 11 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 Classification: DEFINITIVE, STRONG Submitted by: ClinGen, G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, 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 15 ACMG points.

• PM1: In a hotspot region, there are 29 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_000202.8
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-149503473-G-C is described in ClinVar as Pathogenic. ClinVar VariationId is 996919.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant X-149503473-G-A is Pathogenic according to our data. Variant chrX-149503473-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 527322.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IDS	NM_000202.8	MANE Select	c.257C>T	p.Pro86Leu	missense	Exon 3 of 9	NP_000193.1	P22304-1
	IDS	NM_006123.5		c.257C>T	p.Pro86Leu	missense	Exon 3 of 8	NP_006114.1	P22304-2
	IDS	NM_001166550.4		c.15-28C>T		intron	N/A	NP_001160022.1	B4DGD7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IDS	ENST00000340855.11	TSL:1 MANE Select	c.257C>T	p.Pro86Leu	missense	Exon 3 of 9	ENSP00000339801.6	P22304-1
	IDS	ENST00000370441.8	TSL:1	c.257C>T	p.Pro86Leu	missense	Exon 3 of 8	ENSP00000359470.4	P22304-2
	ENSG00000241489	ENST00000651111.1		c.-215-2436C>T		intron	N/A	ENSP00000498395.1	B3KWA1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 24

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	-	-	Mucopolysaccharidosis, MPS-II (4)
1	-	-	Inborn genetic diseases (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.82
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	D
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.94	D
MetaRNN	Pathogenic	1.0	D
MetaSVM	Pathogenic	0.89	D
MutationAssessor	Pathogenic	5.0	H
PhyloP100		9.4
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-9.2	D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.89
MutPred		0.98		Loss of loop (P = 0.0804)
MVP		1.0
MPC		2.2
ClinPred		1.0	D
GERP RS		4.4
Varity_R		0.98
gMVP		1.0
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.62		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.62		Position offset: -28

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1557340280; hg19: chrX-148585003;