chr20-17409305-C-G

Position:

• chr20-17409305-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_002594.5(PCSK2):​c.586C>G​(p.Pro196Ala) variant causes a missense 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PCSK2 NM_002594.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.85

Genes affected

PCSK2 (HGNC:8744): (proprotein convertase subtilisin/kexin type 2) 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 protein undergoes an initial autocatalytic processing event and interacts with a neuroendocrine secretory protein in the ER, exits the ER and sorts to secretory granules, where it is cleaved and catalytically activated during intracellular transport. The encoded protease is packaged into and activated in dense core secretory granules and expressed in the neuroendocrine system and brain. This gene encodes one of the seven basic amino acid-specific members which cleave their substrates at single or paired basic residues. It functions in the proteolytic activation of polypeptide hormones and neuropeptides precursors. Single nucleotide polymorphisms in this gene may increase susceptibility to myocardial infarction and type 2 diabetes. This gene may also play a role in tumor development and progression. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jan 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.915

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PCSK2	NM_002594.5	c.586C>G	p.Pro196Ala	missense_variant	6/12	ENST00000262545.7
PCSK2	NM_001201528.2	c.529C>G	p.Pro177Ala	missense_variant	7/13
PCSK2	NM_001201529.3	c.481C>G	p.Pro161Ala	missense_variant	5/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PCSK2	ENST00000262545.7	c.586C>G	p.Pro196Ala	missense_variant	6/12	1	NM_002594.5	P1
PCSK2	ENST00000377899.5	c.529C>G	p.Pro177Ala	missense_variant	7/13	1
PCSK2	ENST00000536609.1	c.481C>G	p.Pro161Ala	missense_variant	5/11	2
PCSK2	ENST00000470007.1	n.581C>G		non_coding_transcript_exon_variant	6/6	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2022

The c.586C>G (p.P196A) alteration is located in exon 6 (coding exon 6) of the PCSK2 gene. This alteration results from a C to G substitution at nucleotide position 586, causing the proline (P) at amino acid position 196 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.50	.;D;.
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D;D;D
M_CAP	Benign	0.040	D
MetaRNN	Pathogenic	0.92	D;D;D
MetaSVM	Benign	-0.80	T
MutationAssessor	Pathogenic	3.0	.;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.75	T
PROVEAN	Pathogenic	-7.9	D;D;D
REVEL	Uncertain	0.44
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		0.74	.;P;.
Vest4		0.86
MutPred		0.78		.;Loss of disorder (P = 0.0686);.;
MVP		0.69
MPC		0.99
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.83
gMVP		0.94

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-17389950;