X-149501018-G-T

Variant names:

• chrX-149501018-G-T
• rs1141608
• NM_000202.8:c.438C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP6_Moderate

The NM_000202.8(IDS):​c.438C>A​(p.Thr146Thr) 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. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T146T) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: IDS NM_000202.8 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.771
• Publications: 0 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: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant X-149501018-G-T is Benign according to our data. Variant chrX-149501018-G-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1051081.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IDS	NM_000202.8	c.438C>A	p.Thr146Thr	synonymous_variant	Exon 4 of 9	ENST00000340855.11	NP_000193.1
IDS	NM_001166550.4	c.168C>A	p.Thr56Thr	synonymous_variant	Exon 4 of 9		NP_001160022.1
IDS	NM_006123.5	c.438C>A	p.Thr146Thr	synonymous_variant	Exon 4 of 8		NP_006114.1
IDS	NR_104128.2	n.607C>A		non_coding_transcript_exon_variant	Exon 4 of 9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IDS	ENST00000340855.11	c.438C>A	p.Thr146Thr	synonymous_variant	Exon 4 of 9	1	NM_000202.8	ENSP00000339801.6
ENSG00000241489	ENST00000651111.1	c.-196C>A		5_prime_UTR_variant	Exon 9 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: 1060144 Hom.: 0 Cov.: 25 AF XY: 0.00 AC XY: 0 AN XY: 335500

African (AFR) AF: 0.00 AC: 0 AN: 25624

American (AMR) AF: 0.00 AC: 0 AN: 35165

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19134

East Asian (EAS) AF: 0.00 AC: 0 AN: 30099

South Asian (SAS) AF: 0.00 AC: 0 AN: 53569

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40291

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4055

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 807277

Other (OTH) AF: 0.00 AC: 0 AN: 44930

GnomAD4 genome Cov.: 22

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Mucopolysaccharidosis, MPS-II Benign:1

Nov 27, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.60
CADD	Benign	11
DANN	Benign	0.70
PhyloP100		0.77

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.34		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.34		Position offset: -2

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

Other links and lift over

dbSNP: rs1141608; hg19: chrX-148582549;