Genetic Variant IDUA:p.Pro528Pro (chr4-1003404-C-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7

The NM_000203.5(IDUA):c.1584C>T(p.Pro528Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000218 in 1,373,038 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 Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. P528P) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000022 ( 0 hom. )

Consequence

IDUA
NM_000203.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -1.98

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

mucopolysaccharidosis type 1
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen, Myriad Women’s Health
Scheie syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae), Orphanet
Hurler syndrome
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, PanelApp Australia
Hurler-Scheie syndrome
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet

IDUA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).

BP6

Variant 4-1003404-C-T is Benign according to our data. Variant chr4-1003404-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 526837.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-1.98 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IDUA	NM_000203.5 link	c.1584C>T	p.Pro528Pro	synonymous_variant	Exon 11 of 14	ENST00000514224.2	NP_000194.2	P35475-1
IDUA	XM_047415650.1 link	c.1771C>T	p.Arg591Cys	missense_variant	Exon 10 of 12		XP_047271606.1
IDUA	NM_001363576.1 link	c.1188C>T	p.Pro396Pro	synonymous_variant	Exon 10 of 13		NP_001350505.1
IDUA	NR_110313.1 link	n.1672C>T		non_coding_transcript_exon_variant	Exon 11 of 14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IDUA	ENST00000514224.2 link	c.1584C>T	p.Pro528Pro	synonymous_variant	Exon 11 of 14	2	NM_000203.5	ENSP00000425081.2		P35475-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000218

AC:

AN:

1373038

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

677300

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30244

American (AMR)

AF:

0.00

AC:

AN:

35030

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24750

East Asian (EAS)

AF:

0.0000576

AC:

AN:

34726

South Asian (SAS)

AF:

0.0000128

AC:

AN:

78264

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4264

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1075056

Other (OTH)

AF:

0.00

AC:

AN:

57284

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Mucopolysaccharidosis type 1

Benign:1

Jan 12, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

0.11

(source)

DANN

Benign

0.82

PhyloP100

-2.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over