rs281865084

Positions:

chr10-98425686-TG-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000195.5(HPS1):c.1189delC(p.Gln397fs) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000911 in 1,613,148 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000088 ( 0 hom. )

Consequence

HPS1
NM_000195.5 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:16O:1

Conservation

PhyloP100: 2.01

Variant links:

Genes affected

HPS1 (HGNC:5163): (HPS1 biogenesis of lysosomal organelles complex 3 subunit 1) This gene encodes a protein that may play a role in organelle biogenesis associated with melanosomes, platelet dense granules, and lysosomes. The encoded protein is a component of three different protein complexes termed biogenesis of lysosome-related organelles complex (BLOC)-3, BLOC4, and BLOC5. Mutations in this gene are associated with Hermansky-Pudlak syndrome type 1. Alternative splicing results in multiple transcript variants. A pseudogene related to this gene is located on chromosome 22. [provided by RefSeq, Aug 2015]

HPS1 links:

ENSG00000289758 (HGNC:):

ENSG00000289758 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 10-98425686-TG-T is Pathogenic according to our data. Variant chr10-98425686-TG-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 21091.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr10-98425686-TG-T is described in Lovd as [Pathogenic]. Variant chr10-98425686-TG-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HPS1	NM_000195.5 linkuse as main transcript	c.1189delC	p.Gln397fs	frameshift_variant	13/20	ENST00000361490.9	NP_000186.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
HPS1	ENST00000361490.9 linkuse as main transcript	c.1189delC	p.Gln397fs	frameshift_variant	13/20	1	NM_000195.5	ENSP00000355310.4	Q92902-1
ENSG00000289758	ENST00000699159.1 linkuse as main transcript	n.*548delC		non_coding_transcript_exon_variant	12/24			ENSP00000514167.1	A0A8V8TP71
ENSG00000289758	ENST00000699159.1 linkuse as main transcript	n.*548delC		3_prime_UTR_variant	12/24			ENSP00000514167.1	A0A8V8TP71

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000250

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000720

AC:

AN:

249956

Hom.:

AF XY:

0.0000813

AC XY:

AN XY:

135294

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:

0.000159

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000883

AC:

129

AN:

1460960

Hom.:

Cov.:

AF XY:

0.0000771

AC XY:

AN XY:

726706

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000114

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000118

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.000250

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000182

Hom.:

Bravo

AF:

0.000110

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:16Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hermansky-Pudlak syndrome 1

Pathogenic:9Other:1

Pathogenic, criteria provided, single submitter	clinical testing	Centre for Mendelian Genomics, University Medical Centre Ljubljana	Sep 16, 2019	This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PVS1,PS1,PM2,PM3,PP4. This variant was detected in homozygous state. -
not provided, no classification provided	literature only	GeneReviews	-	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	The HPS1 c.1189delC (p.Gln397SerfsTer2) variant results in a frameshift and is predicted to cause a premature termination of the protein. The variant is reported in six studies in which it is found in a total of nine out of 43 individuals with Hermansky-Pudlak syndrome (HPS), including two homozygotes, one hemizygote, and six compound heterozygotes, and in four unaffected heterozygous family members (Oh et al. 1998; Shotelersuk et al. 1998; Griffin et al. 2005; Huizing et al. 2007; Sandrock et al. 2010; Westmoreland et al. 2016). Control data are unavailable for this variant, which is reported at a frequency of 0.00012 in the European (non-Finnish) population of the Exome Aggregation Consortium. Northern blot analysis of fibroblasts from the hemizygous individual showed significantly reduced HPS RNA (Shotelersuk et al. 1998). Based on the collective evidence, the p.Gln397SerfsTer2 variant is classified as pathogenic for Hermansky-Pudlak syndrome. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -
Pathogenic, no assertion criteria provided	research	ISTH-SSC Genomics in Thrombosis and Hemostasis, KU Leuven, Center for Molecular and Vascular Biology	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Apr 19, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 26, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Laboratory of Medical Genetics, National & Kapodistrian University of Athens	Feb 15, 2024	PVS1, PM2, PP5 - The variant has been reported in ClinVar as Pathogenic by other laboratories (Variation ID 21091). This variant has been previously reported as causative (PMID:31619213). -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 01, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Pittsburgh Clinical Genomics Laboratory, University of Pittsburgh Medical Center	Aug 16, 2023	This sequence variant is a single nucleotide deletion (delC) at coding position 1189 of the HPS1 gene that results in an early termition sigl 2 codons downstream of the frameshift at Gln397. As it occurs in exon 13 of 20, this variant is predicted to generate a non-functiol allele through either the expression of a truncated protein or a loss of HPS1 expression due to nonsense-mediated decay. This is a previously reported variant (ClinVar 21091) that has been observed in homozygous or compound heterozygous state in many individuals and families affected by Hermansky-Pudlak syndrome (PMID: 9497254, 9705234, 12442288, 15952982, 20514622, 26806224). This variant is present in 19 of 281342 alleles (0.0068%) in the gnomAD population dataset. Haploinsufficiency in HPS1 is a known mechanism of disease. Based upon the evidence, we consider this variant to be pathogenic. ACMG Criteria: PM3, PS4, PVS1 -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen	Feb 20, 2024	- -

Hermansky-Pudlak syndrome

Pathogenic:3

Pathogenic, criteria provided, single submitter	curation	Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard	Nov 29, 2021	The p.Gln397fs variant in HPS1 has been reported in at least 9 individuals with Hermansky-Pudlak syndrome (PMID: 31619213, 26806224, 28081892, 20514622, 9497254, 15952982), segregated with disease in 2 affected relatives from 2 families (PMID: 20514622) and has been identified in 0.01% (19/128472) of European (non-Finnish) chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP ID: rs281865084). Although this variant has been seen in the general population in a heterozygous state, its frequency is not high enough to rule out a pathogenic role. This variant has also been reported in ClinVar (Variation ID#: 21091) and has been interpreted as Likely Pathogenic or Pathogenic by Illumina Clinical Services Laboratory (Illumina), Centre for Mendelian Genomics (University Medical Centre Ljubljana), NIHR Bioresource Rare Diseases (University of Cambridge), Invitae, and GeneReviews. Of the at least 9 affected individuals, 2 of those were homozygotes, and 1 were compound heterozygote that carried a reported likely pathogenic variants in trans, which increases the likelihood that the p.Gln397fs variant is pathogenic (PMID: 17365864, 9497254, 20514622). This variant is predicted to cause a frameshift, which alters the protein’s amino acid sequence beginning at position 397 and leads to a premature termination codon 2 amino acids downstream. This alteration is then predicted to lead to a truncated or absent protein. Loss of function of the HPS1 gene is an established disease mechanism in autosomal recessive Hermansky-Pudlak syndrome. In summary, this variant meets criteria to be classified as pathogenic for autosomal recessive Hermansky-Pudlak syndrome. ACMG/AMP Criteria applied: PM3_strong, PVS1, PP1_moderate (Richards 2015). -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Jul 24, 2020	- -
Pathogenic, criteria provided, single submitter	research	NIHR Bioresource Rare Diseases, University of Cambridge	Feb 01, 2019	- -

not provided

Pathogenic:3

Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	This sequence change creates a premature translational stop signal (p.Gln397Serfs*2) in the HPS1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in HPS1 are known to be pathogenic (PMID: 12442288, 16185271). This variant is present in population databases (rs281865084, gnomAD 0.02%). This premature translational stop signal has been observed in individuals with HPS1-related conditions (PMID: 9497254, 20514622, 28081892). This variant is also known as E397delC. ClinVar contains an entry for this variant (Variation ID: 21091). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

HPS1-related disorder

Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 30, 2024

The HPS1 c.1189delC variant is predicted to result in a frameshift and premature protein termination (p.Gln397Serfs*2). This variant has been reported in individuals with Hermansky-Pudlak syndrome in the compound heterozygous states (Marti et al. 2017. PubMed ID: 28976636; supplemental Table 3, Downes et al. 2019. PubMed ID: 31064749) This variant is reported in 0.015% of alleles in individuals of European (Non-Finnish) descent in gnomAD. Frameshift variants in HPS1 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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