Variant rs778796405 details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP7BS2

The ENST00000710286.1(PCSK9):c.27C>A(p.Arg9=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000248 in 443,046 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00025 ( 0 hom. )

Consequence

PCSK9
ENST00000710286.1 synonymous

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: -1.65

Variant links:

Genes affected

PCSK9 (HGNC:20001): (proprotein convertase subtilisin/kexin type 9) This gene encodes a member of the subtilisin-like proprotein convertase family, which includes proteases that process protein and peptide precursors trafficking through regulated or constitutive branches of the secretory pathway. The encoded protein undergoes an autocatalytic processing event with its prosegment in the ER and is constitutively secreted as an inactive protease into the extracellular matrix and trans-Golgi network. It is expressed in liver, intestine and kidney tissues and escorts specific receptors for lysosomal degradation. It plays a role in cholesterol and fatty acid metabolism. Mutations in this gene have been associated with autosomal dominant familial hypercholesterolemia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2014]

PCSK9 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.64).

BP7

Synonymous conserved (PhyloP=-1.65 with no splicing effect.

BS2

High AC in GnomAd4 at 37 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PCSK9	NM_174936.4 linkuse as main transcript			upstream_gene_variant		ENST00000302118.5	NP_777596.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PCSK9	ENST00000710286.1 linkuse as main transcript	c.27C>A	p.Arg9=	synonymous_variant	1/12			ENSP00000518176	A2
PCSK9	ENST00000673726.1 linkuse as main transcript	c.-331C>A		5_prime_UTR_variant, NMD_transcript_variant	1/6			ENSP00000501004
PCSK9	ENST00000673913.2 linkuse as main transcript	c.-331C>A		5_prime_UTR_variant, NMD_transcript_variant	1/12			ENSP00000501161
PCSK9	ENST00000302118.5 linkuse as main transcript			upstream_gene_variant		1	NM_174936.4	ENSP00000303208	P2	Q8NBP7-1

Frequencies

GnomAD3 genomes

AF:

0.000243

AC:

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000441

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000251

AC:

AN:

290704

Hom.:

Cov.:

AF XY:

0.000192

AC XY:

AN XY:

150678

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000135

Gnomad4 FIN exome

AF:

0.0000534

Gnomad4 NFE exome

AF:

0.000378

Gnomad4 OTH exome

AF:

0.0000569

GnomAD4 genome

AF:

0.000243

AC:

AN:

152342

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74492

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000569

Hom.:

Bravo

AF:

0.000268

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hypercholesterolemia, autosomal dominant, 3

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 12, 2021	This variant occurs in a non-coding region of the PCSK9 gene. It does not change the encoded amino acid sequence of the PCSK9 protein. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This variant has been observed in individual(s) with hypercholesterolemia (PMID: 18559913, 28965616). ClinVar contains an entry for this variant (Variation ID: 438331). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental studies have shown that this variant affects PCSK9 protein function (PMID: 18559913). 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Cardiovascular Genetics Laboratory, PathWest Laboratory Medicine WA - Fiona Stanley Hospital	Jan 05, 2022	The PCSK9 promoter variant c.-331C>A is present at a very low frequency in the gnomAD v3.1.2 population database (global: 37/152,224 alleles; European: 30/68,038 alleles) and is of uncertain significance for familial hypercholesterolaemia (FH). This variant is located close to the core sterol regulatory element (SRE) in the promoter region of PCSK9 inside a specificity protein-1 transcription factor (SP1) site (PMID:17921436). The PCSK9 c.-331C>A variant has been previously reported (as PCSK9 c.-332C>A) in a Spanish FH patient. In vitro studies indicated that this variant caused a 2.5-fold increase in PCSK9 promoter activity compared to wild-type, and could be a possible cause of hypercholesterolaemia (PMID:18559913). -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	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. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Mar 08, 2024

Variant summary: PCSK9 c.-331C>A is located in the untranscribed region upstream of the PCSK9 gene region. The variant allele was found at a frequency of 0.00025 in 443046 control chromosomes. The observed variant frequency is approximately 6.62 fold of the estimated maximal expected allele frequency for a pathogenic variant in PCSK9 causing Familial Hypercholesterolemia phenotype (3.8e-05), suggesting that the variant is benign. c.-331C>A has been reported in the literature in individuals affected with autosomal dominant hypercholesterolemia and definite or probable FH (Blesa_2008, Pirillo_2017). These reports do not provide unequivocal conclusions about association of the variant with Familial Hypercholesterolemia. Experimental studies have shown the variant caused a 2.5-fold increase in PCSK9 promoter activity relative to wild-type construction activity when transfected in HepG2 and 3T3 cells. Additionally, treatment of cells with statins (lovastatin) caused an even stronger activation in c.-332C>A mutant, maintaining the 2.5-fold of overexpression in relation to the normal sequence. However, due to technical limitations, expression studies in patients could not be considered not conclusive (Blesa_2008). The following publications have been ascertained in the context of this evaluation (PMID: 18559913, 28965616). ClinVar contains an entry for this variant (Variation ID: 438331). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Hypercholesterolemia, familial, 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

curation;literature only

Cardiovascular Research Group, Instituto Nacional de Saude Doutor Ricardo Jorge

Mar 01, 2016

- -

Hypobetalipoproteinemia

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

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). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Feb 01, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.64

CADD

Benign

5.1

DANN

Benign

0.90

Splicing

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