1-55052400-T-C

Position:

• chr1-55052400-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP3_Strong PP5

The NM_174936.4(PCSK9):​c.646T>C​(p.Phe216Leu) variant causes a missense change. 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PCSK9 NM_174936.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1 O:1
• Conservation: PhyloP100: 5.27

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 Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 uncertain in NM_174936.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.947
• PP5: Variant 1-55052400-T-C is Pathogenic according to our data. Variant chr1-55052400-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 2874.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PCSK9	NM_174936.4	c.646T>C	p.Phe216Leu	missense_variant	4/12	ENST00000302118.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PCSK9	ENST00000302118.5	c.646T>C	p.Phe216Leu	missense_variant	4/12	1	NM_174936.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1 Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Hypercholesterolemia, autosomal dominant, 3 Pathogenic:1 Other:1

not provided, no classification provided	literature only	GeneReviews	-	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Feb 12, 2008	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.70
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.10
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.15	T
Eigen	Benign	0.091
Eigen_PC	Benign	0.098
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.052	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Uncertain	-0.15	T
MutationAssessor	Benign	1.3	L
MutationTaster	Benign	0.039	A;A;A
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.60
Sift	Benign	0.075	T
Sift4G	Uncertain	0.039	D
Polyphen		0.91	P
Vest4		0.82
MutPred		0.77		Gain of relative solvent accessibility (P = 0.0249);
MVP		0.87
MPC		0.60
ClinPred		0.89	D
GERP RS		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.41
gMVP		0.55

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: rs28942112; hg19: chr1-55518073;