rs1553137710

chr1-55058624-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_174936.4(PCSK9):c.1480A>G(p.Lys494Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. K494K) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PCSK9 NM_174936.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.526

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 9 uncertain in NM_174936.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09929174).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PCSK9	NM_174936.4	c.1480A>G	p.Lys494Glu	missense_variant	9/12	ENST00000302118.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PCSK9	ENST00000302118.5	c.1480A>G	p.Lys494Glu	missense_variant	9/12	1	NM_174936.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 109

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hypercholesterolemia, familial, 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Iberoamerican FH Network

Mar 01, 2016

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.079	T
BayesDel_noAF	Benign	-0.35
Cadd	Benign	15
Dann	Uncertain	0.99
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.15
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.62	T
M_CAP	Benign	0.034	D
MetaRNN	Benign	0.099	T
MetaSVM	Benign	-0.79	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	D;N
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.68	N
REVEL	Benign	0.066
Sift	Benign	0.37	T
Sift4G	Benign	0.15	T
Polyphen		0.10	B
Vest4		0.20
MutPred		0.30		Loss of MoRF binding (P = 0.0034);
MVP		0.81
MPC		0.34
ClinPred		0.19	T
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.31
gMVP		0.73

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

Other links and lift over

dbSNP: rs1553137710; hg19: chr1-55524297;