rs187833337

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_000203.5(IDUA):c.1757C>T(p.Ser586Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000496 in 1,612,286 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

IDUA
NM_000203.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5O:1

Conservation

PhyloP100: 0.781

Variant links:

Genes affected

IDUA (HGNC:5391): (alpha-L-iduronidase) This gene encodes an enzyme that hydrolyzes the terminal alpha-L-iduronic acid residues of two glycosaminoglycans, dermatan sulfate and heparan sulfate. This hydrolysis is required for the lysosomal degradation of these glycosaminoglycans. Mutations in this gene that result in enzymatic deficiency lead to the autosomal recessive disease mucopolysaccharidosis type I (MPS I). [provided by RefSeq, Jul 2008]

IDUA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.29683197).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IDUA	NM_000203.5 link	c.1757C>T	p.Ser586Phe	missense_variant	Exon 13 of 14	ENST00000514224.2	NP_000194.2	P35475-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IDUA	ENST00000514224.2 link	c.1757C>T	p.Ser586Phe	missense_variant	Exon 13 of 14	2	NM_000203.5	ENSP00000425081.2	P35475-1
IDUA	ENST00000247933.9 link	c.1757C>T	p.Ser586Phe	missense_variant	Exon 13 of 14	1		ENSP00000247933.4	P35475-1
IDUA	ENST00000514698.5 link	n.1868C>T		non_coding_transcript_exon_variant	Exon 10 of 11	5
IDUA	ENST00000652070.1 link	n.1813C>T		non_coding_transcript_exon_variant	Exon 12 of 13

Frequencies

GnomAD3 genomes

AF:

0.000186

AC:

AN:

150802

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000513

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000199

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000443

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000716

AC:

AN:

251224

Hom.:

AF XY:

0.0000957

AC XY:

AN XY:

135846

show subpopulations

Gnomad AFR exome

AF:

0.000678

Gnomad AMR exome

AF:

0.0000867

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000356

AC:

AN:

1461366

Hom.:

Cov.:

AF XY:

0.0000371

AC XY:

AN XY:

726978

show subpopulations

Gnomad4 AFR exome

AF:

0.000687

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.000186

AC:

AN:

150920

Hom.:

Cov.:

AF XY:

0.000149

AC XY:

AN XY:

73632

show subpopulations

Gnomad4 AFR

AF:

0.000512

Gnomad4 AMR

AF:

0.000199

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000443

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000683

Hom.:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000906

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Mucopolysaccharidosis type 1

Uncertain:2Other:1

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Pseudodeficiency variants -

Oct 19, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 586 of the IDUA protein (p.Ser586Phe). This variant is present in population databases (rs187833337, gnomAD 0.06%). This missense change has been observed in individual(s) with a positive newborn screening result for IDUA-related disease (PMID: 29143201, 30442156, 32432561). ClinVar contains an entry for this variant (Variation ID: 571910). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on IDUA protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Apr 21, 2020

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided

Uncertain:2

Breakthrough Genomics, Breakthrough Genomics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Mar 13, 2023

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Uncertain:1

Dec 07, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: IDUA c.1757C>T (p.Ser586Phe) results in a non-conservative amino acid change located in the Alpha-L-iduronidase, C-terminal domain (IPR049167) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 7.9e-05 in 254582 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in IDUA causing Mucopolysaccharidosis Type 1 (7.9e-05 vs 0.0027), allowing no conclusion about variant significance. c.1757C>T has been reported in the literature in individuals affected with the Pseudo Mucopolysaccharidosis Type 1 (e.g. Burlina_2017, Polo_2020). These reports do not provide unequivocal conclusions about association of the variant with Mucopolysaccharidosis Type 1. At least one publication reports experimental evidence evaluating an impact on protein function: the variant was identified as a pseudodeficiency variant with 18% specific enzyme activity when transfected into HAP1 IDUA-deficient cells, placing it within the range of previously documented pseudodeficiency variants. The following publications have been ascertained in the context of this evaluation (PMID: 29143201, 29140481, 32432561, 29947050, 33198351). Three submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.17

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.80

D;.

Eigen

Uncertain

0.29

Eigen_PC

Benign

0.20

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.85

D;.

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.30

T;T

MetaSVM

Uncertain

0.13

MutationAssessor

Uncertain

2.6

M;.

PrimateAI

Benign

0.45

PROVEAN

Uncertain

-3.9

D;D

REVEL

Uncertain

0.47

Sift

Uncertain

0.0060

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

0.98

D;.

Vest4

0.57

MVP

0.92

MPC

0.66

ClinPred

0.62

GERP RS

3.9

Varity_R

0.79

gMVP

0.93

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over