rs3752590

Variant names:

• chr22-26451846-A-T
• rs3752590
• NM_022081.6:c.*1387T>A

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_022081.6(HPS4):​c.*1387T>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00121 in 152,222 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0012 (4 hom., cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: HPS4 NM_022081.6 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.32
• Publications: 1 publications found

Genes affected

HPS4 (HGNC:15844): (HPS4 biogenesis of lysosomal organelles complex 3 subunit 2) This gene encodes a protein component of biogenesis of lysosome-related organelles complexes (BLOC). BLOC complexes are important for the formation of endosomal-lysosomal organelles such as melanosomes and platelet dense granules. Mutations in this gene result in subtype 4 of Hermansky-Pudlak syndrome, a form of albinism. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2012]

HPS4 Gene-Disease associations (from GenCC):

• Hermansky-Pudlak syndrome 4

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Hermansky-Pudlak syndrome with pulmonary fibrosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BP6: Variant 22-26451846-A-T is Benign according to our data. Variant chr22-26451846-A-T is described in ClinVar as Benign. ClinVar VariationId is 900908.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.00121 (184/152222) while in subpopulation EAS AF = 0.0326 (168/5158). AF 95% confidence interval is 0.0285. There are 4 homozygotes in GnomAd4. There are 114 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HPS4	NM_022081.6	c.*1387T>A		3_prime_UTR_variant	Exon 14 of 14	ENST00000398145.7	NP_071364.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HPS4	ENST00000398145.7	c.*1387T>A		3_prime_UTR_variant	Exon 14 of 14	1	NM_022081.6	ENSP00000381213.2

Frequencies

GnomAD3 genomes AF: 0.00122 AC: 185 AN: 152104 Hom.: 4 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.0325

Gnomad SAS AF: 0.00249

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00144

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 3014 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 1642

African (AFR) AF: 0.00 AC: 0 AN: 28

American (AMR) AF: 0.00 AC: 0 AN: 436

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 36

East Asian (EAS) AF: 0.00 AC: 0 AN: 50

South Asian (SAS) AF: 0.00 AC: 0 AN: 278

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 66

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 8

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1994

Other (OTH) AF: 0.00 AC: 0 AN: 118

GnomAD4 genome AF: 0.00121 AC: 184 AN: 152222 Hom.: 4 Cov.: 31 AF XY: 0.00153 AC XY: 114 AN XY: 74422

African (AFR) AF: 0.00 AC: 0 AN: 41544

American (AMR) AF: 0.000131 AC: 2 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.0326 AC: 168 AN: 5158

South Asian (SAS) AF: 0.00228 AC: 11 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10610

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68012

Other (OTH) AF: 0.00142 AC: 3 AN: 2112

Alfa AF: 0.000139 Hom.: 0

Bravo AF: 0.00177

Asia WGS AF: 0.00895 AC: 31 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hermansky-Pudlak syndrome 4 Benign:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	2.6
DANN	Benign	0.79
PhyloP100		-1.3
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs3752590; hg19: chr22-26847812;