Variant chrX-134473357-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PVS1PM2PP3_StrongPP5

The NM_000194.3(HPRT1):c.28-2A>G variant causes a splice acceptor change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (no stars).

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.0 ( 0 hom. 0 hem. )

Failed GnomAD Quality Control

Consequence

HPRT1
NM_000194.3 splice_acceptor

Scores

Splicing: ADA: 1.000

Clinical Significance

Likely pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 9.32

Variant links:

Genes affected

HPRT1 (HGNC:5157): (hypoxanthine phosphoribosyltransferase 1) The protein encoded by this gene is a transferase, which catalyzes conversion of hypoxanthine to inosine monophosphate and guanine to guanosine monophosphate via transfer of the 5-phosphoribosyl group from 5-phosphoribosyl 1-pyrophosphate. This enzyme plays a central role in the generation of purine nucleotides through the purine salvage pathway. Mutations in this gene result in Lesch-Nyhan syndrome or gout.[provided by RefSeq, Jun 2009]

HPRT1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 15 ACMG points.

PVS1

Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 5.3, offset of 5, new splice context is: atatttctttttcggattAGtga. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

PP5

Variant X-134473357-A-G is Pathogenic according to our data. Variant chrX-134473357-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2664053.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HPRT1	NM_000194.3 linkuse as main transcript	c.28-2A>G		splice_acceptor_variant		ENST00000298556.8

Ensembl

Gene	Transcript	HGVSc	Effect	TSL	MANE	Appris
HPRT1	ENST00000298556.8 linkuse as main transcript	c.28-2A>G	splice_acceptor_variant	1	NM_000194.3	P1
HPRT1	ENST00000462974.5 linkuse as main transcript	n.186-2A>G	splice_acceptor_variant, non_coding_transcript_variant	3
HPRT1	ENST00000475720.1 linkuse as main transcript		upstream_gene_variant	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

969824

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

287544

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Lesch-Nyhan syndrome

Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Zotz-Klimas Genetics Lab, MVZ Zotz Klimas

Nov 24, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.74

BayesDel_noAF

Pathogenic

0.29

CADD

Pathogenic

DANN

Uncertain

0.99

FATHMM_MKL

Pathogenic

1.0

MutationTaster

Benign

1.0

GERP RS

4.7

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.93

SpliceAI score (max)

1.0

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.79

Position offset: 7

DS_AL_spliceai

1.0

Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over