NM_033159.4:c.802G>A

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_033159.4(HYAL1):c.802G>A(p.Glu268Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000446 in 1,614,166 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000048 ( 0 hom. )

Consequence

HYAL1
NM_033159.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:2

Conservation

PhyloP100: 7.37

Variant links:

Genes affected

HYAL1 (HGNC:5320): (hyaluronidase 1) This gene encodes a lysosomal hyaluronidase. Hyaluronidases intracellularly degrade hyaluronan, one of the major glycosaminoglycans of the extracellular matrix. Hyaluronan is thought to be involved in cell proliferation, migration and differentiation. This enzyme is active at an acidic pH and is the major hyaluronidase in plasma. Mutations in this gene are associated with mucopolysaccharidosis type IX, or hyaluronidase deficiency. The gene is one of several related genes in a region of chromosome 3p21.3 associated with tumor suppression. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

HYAL1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.983

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HYAL1	NM_033159.4 link	c.802G>A	p.Glu268Lys	missense_variant	Exon 2 of 4	ENST00000395144.7	NP_149349.2	Q12794-1A0A024R2X3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HYAL1	ENST00000395144.7 link	c.802G>A	p.Glu268Lys	missense_variant	Exon 2 of 4	1	NM_033159.4	ENSP00000378576.2		Q12794-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152174

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:

0.00316

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000756

AC:

AN:

251402

Hom.:

AF XY:

0.0000883

AC XY:

AN XY:

135902

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:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000150

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000479

AC:

AN:

1461874

Hom.:

Cov.:

AF XY:

0.0000399

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000540

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74470

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.000148

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Deficiency of hyaluronoglucosaminidase

Pathogenic:1Uncertain:2

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 268 of the HYAL1 protein (p.Glu268Lys). This variant is present in population databases (rs104893743, gnomAD 0.02%). This missense change has been observed in individual(s) with mucopolysaccharidosis type IX (PMID: 10339581). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 3530). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

May 25, 1999

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Oct 15, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The HYAL1 c.802G>A (p.Glu268Lys) variant is a missense variant that has been reported in one study in which it is found in a compound heterozygous state with a stop-gained variant in one individual with mucopolysaccharidosis IX (Triggs-Raine et al., 1999; Natowicz et al., 1996). The patient's unaffected father and paternal grandmother both carried the variant in a heterozygous state. The variant was not found in 100 control alleles and is reported at a frequency of 0.000256 in the European (non-Finnish) population of the Exome Aggregation Consortium. The patient had deficient serum hyaluronidase activity and 38- to 90-fold elevated concentration of serum hyaluronic acid (Natowicz et al., 1996). Triggs-Raine et al. (1999) predict the variant to disrupt HYAL1 activity because of the difference in charges between the glutamine and lysine residues. The Glu268 residue is highly conserved and is likely critical for the function of an active site in the HYAL1 protein. In silico analysis of native and mutant HYAL demonstrated differences in folding pattern, secondary structure elements, dihedral angles, and binding strength (Paul & Rajasekaran 2017). The evidence for this variant is limited. The p.Glu268Lys variant is therefore classified as a variant of unknown significance but suspicious for pathogenicity for mucopolysaccharidosis, type IX. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.81

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Pathogenic

0.26

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.73

D;D;D;D;.;.;.

Eigen

Pathogenic

0.92

Eigen_PC

Pathogenic

0.82

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

.;.;D;.;D;D;D

M_CAP

Benign

0.057

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D;D

MetaSVM

Uncertain

0.18

MutationAssessor

Pathogenic

4.0

H;H;H;H;H;.;.

PrimateAI

Uncertain

0.52

PROVEAN

Uncertain

-3.8

D;D;.;D;D;D;D

REVEL

Uncertain

0.53

Sift

Uncertain

0.0020

D;D;.;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D;D

Polyphen

1.0

D;D;D;D;D;.;.

Vest4

0.94

MutPred

0.94

Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);.;.;

MVP

0.88

MPC

0.84

ClinPred

0.97

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.98

gMVP

0.98

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