Genetic Variant GUSB:p.Tyr529Cys (chr7-65967798-T-C) – ACMG Classification: Uncertain_significance (5 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2PP3_ModeratePP5

The NM_000181.4(GUSB):c.1586A>G(p.Tyr529Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,334 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

GUSB
NM_000181.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:1

Conservation

PhyloP100: 7.91

Publications

4 publications found

Variant links:

Genes affected

GUSB (HGNC:4696): (glucuronidase beta) This gene encodes a hydrolase that degrades glycosaminoglycans, including heparan sulfate, dermatan sulfate, and chondroitin-4,6-sulfate. The enzyme forms a homotetramer that is localized to the lysosome. Mutations in this gene result in mucopolysaccharidosis type VII. Alternative splicing results in multiple transcript variants. There are many pseudogenes of this locus in the human genome.[provided by RefSeq, May 2014]

GUSB Gene-Disease associations (from GenCC):

mucopolysaccharidosis type 7
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet, ClinGen, G2P

GUSB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.934

PP5

Variant 7-65967798-T-C is Pathogenic according to our data. Variant chr7-65967798-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 190464.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000181.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GUSB	NM_000181.4	MANE Select	c.1586A>G	p.Tyr529Cys	missense	Exon 10 of 12	NP_000172.2	P08236-1
GUSB	NM_001284290.2		c.1148A>G	p.Tyr383Cys	missense	Exon 8 of 10	NP_001271219.1	P08236-3
GUSB	NM_001293104.2		c.1016A>G	p.Tyr339Cys	missense	Exon 9 of 11	NP_001280033.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GUSB	ENST00000304895.9	TSL:1 MANE Select	c.1586A>G	p.Tyr529Cys	missense	Exon 10 of 12	ENSP00000302728.4	P08236-1
GUSB	ENST00000461622.1	TSL:1	n.111A>G		non_coding_transcript_exon	Exon 1 of 2
GUSB	ENST00000864783.1		c.1670A>G	p.Tyr557Cys	missense	Exon 10 of 12	ENSP00000534842.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460334

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726618

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52580

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111360

Other (OTH)

AF:

0.00

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

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

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Non-immune hydrops fetalis (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.16

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.86

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.94

M_CAP

Pathogenic

0.36

MetaRNN

Pathogenic

0.93

MetaSVM

Pathogenic

0.99

MutationAssessor

Uncertain

2.4

PhyloP100

7.9

PrimateAI

Benign

0.45

PROVEAN

Pathogenic

-5.7

REVEL

Pathogenic

0.81

Sift

Benign

0.14

Sift4G

Benign

0.14

Polyphen

1.0

Vest4

0.90

MutPred

0.67

Gain of methylation at K530 (P = 0.0239)

MVP

0.99

MPC

1.3

ClinPred

0.97

GERP RS

5.5

Varity_R

0.52

gMVP

0.92

Mutation Taster

=18/82

disease causing (ClinVar)

(source)

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over