chr17-42543568-C-T

Position:

chr17-42543568-C-T

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_000263.4(NAGLU):c.1562C>T(p.Pro521Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000657 in 1,612,256 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

NAGLU
NM_000263.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:10U:1O:1

Conservation

PhyloP100: 7.60

Variant links:

Genes affected

NAGLU (HGNC:7632): (N-acetyl-alpha-glucosaminidase) This gene encodes an enzyme that degrades heparan sulfate by hydrolysis of terminal N-acetyl-D-glucosamine residues in N-acetyl-alpha-D-glucosaminides. Defects in this gene are the cause of mucopolysaccharidosis type IIIB (MPS-IIIB), also known as Sanfilippo syndrome B. This disease is characterized by the lysosomal accumulation and urinary excretion of heparan sulfate. [provided by RefSeq, Jul 2008]

NAGLU links:

ENSG00000266929 (HGNC:):

ENSG00000266929 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.994

PP5

Variant 17-42543568-C-T is Pathogenic according to our data. Variant chr17-42543568-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1566.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-42543568-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NAGLU	NM_000263.4 linkuse as main transcript	c.1562C>T	p.Pro521Leu	missense_variant	6/6	ENST00000225927.7	NP_000254.2	P54802A0A140VJE4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
NAGLU	ENST00000225927.7 linkuse as main transcript	c.1562C>T	p.Pro521Leu	missense_variant	6/6	1	NM_000263.4	ENSP00000225927.1	P54802
NAGLU	ENST00000591587.1 linkuse as main transcript	c.*531C>T		3_prime_UTR_variant	4/4	5		ENSP00000467836.1	K7EQH9
ENSG00000266929	ENST00000585572.1 linkuse as main transcript	n.379+4813C>T		intron_variant		4
NAGLU	ENST00000592454.1 linkuse as main transcript	c.*405C>T		downstream_gene_variant		2		ENSP00000468665.1	K7ESD7

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000203

AC:

AN:

245890

Hom.:

AF XY:

0.0000299

AC XY:

AN XY:

133934

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.0000452

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000699

AC:

102

AN:

1460016

Hom.:

Cov.:

AF XY:

0.0000633

AC XY:

AN XY:

726304

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000101

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000836

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152240

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74370

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000591

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:10Uncertain:1Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Mucopolysaccharidosis, MPS-III-B

Pathogenic:5Uncertain:1

Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Aug 25, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Feb 13, 2019	Variant summary: NAGLU c.1562C>T (p.Pro521Leu) results in a non-conservative amino acid change located in the C-terminal domain 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 2.6e-05 in 271726 control chromosomes (gnomAD). c.1562C>T has been reported in the literature in compound heterozygous and homozygous individuals affected with Mucopolysaccharidosis Type IIIB (Sanfilippo Syndrome B) (e.g. Zhao 1998, Beesley 2005, Valstar 2010). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. A ClinVar submission from a clinical diagnostic laboratory (evaluation after 2014) cites the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as pathogenic. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Clinical Genomics Laboratory, Washington University in St. Louis	Feb 08, 2024	The NAGLU c.1562C>T (p.Pro521Leu) variant has been reported in 13 individuals affected with Mucopolysaccharidosis Type IIIB (Sanfilippo Syndrome B) and is reported to segregate with disease in nine individuals in two families (Beesley CE et al., PMID: 9832037; Valstar MJ et al., PMID: 20852935; Weber B et al., PMID: 10094189; Zhao HG et al., PMID: 9443875; Zheng Q et al., PMID: 28306536). Of those individuals, nine were compound heterozygous for the variant and a pathogenic/likely pathogenic variant was confirmed to be in trans (Valstar MJ et al., PMID: 20852935; Zhao HG et al., PMID: 9443875) and two individuals were homozygous for the variant (Beesley CE et al., PMID: 9832037; Weber B et al., PMID: 10094189). This variant is only observed on 7 out of 277,290 alleles in the general population (gnomAD v.2.1.1), indicating it is not a common variant. Computational predictors indicate that the variant is damaging, evidence that correlates with impact to NAGLU function. This variant has been reported in the ClinVar database as a pathogenic or likely pathogenic germline variant by seven submitters. Based on available information and the ACMG/AMP guidelines for variant interpretation (Richards S et al., PMID: 25741868), this variant is classified as likely pathogenic. -
Uncertain significance, no assertion criteria provided	curation	SingHealth Duke-NUS Institute of Precision Medicine	Jun 07, 2017	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 01, 1999	- -
Pathogenic, criteria provided, single submitter	clinical testing	Juno Genomics, Hangzhou Juno Genomics, Inc	-	PM2_Supporting+PM3_VeryStrong+PP4+PP3_Moderate -

not provided

Pathogenic:3

Likely pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Mar 02, 2022	- -
Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Mucopolysaccharidosis, MPS-III-B;C5569050:Charcot-Marie-Tooth disease axonal type 2V

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 23, 2024	This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 521 of the NAGLU protein (p.Pro521Leu). This variant is present in population databases (rs104894595, gnomAD 0.006%). This missense change has been observed in individual(s) with mucopolysaccharidosis type III (PMID: 9443875, 20852935, 28306536). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 1566). 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) performed at Invitae indicates that this missense variant is expected to disrupt NAGLU protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Mar 09, 2022	- -

Mucopolysaccharidosis

Other:1

not provided, no classification provided

literature only

GeneReviews

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.82

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.52

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.99

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.95

M_CAP

Pathogenic

0.81

MetaRNN

Pathogenic

0.99

MetaSVM

Pathogenic

0.88

MutationAssessor

Pathogenic

3.7

PrimateAI

Uncertain

0.63

PROVEAN

Pathogenic

-7.9

REVEL

Pathogenic

0.93

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0020

Polyphen

1.0

Vest4

0.95

MutPred

0.87

Gain of helix (P = 0.0093);

MVP

0.98

MPC

1.2

ClinPred

1.0

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.97

gMVP

0.92

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

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