Is PCSK9 p.Ser262= (c.786C>T) pathogenic?

PCSK9 p.Ser262= (c.786C>T) is classified Likely benign in PCSK9 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-09-10). Ultra-rare (popmax 0.0201%, eas); Associated with Cardiovascular phenotype.

What condition is associated with PCSK9 p.Ser262= (c.786C>T)?

PCSK9 p.Ser262= (c.786C>T) is associated with Cardiovascular phenotype, familial hypercholesterolemia, hypercholesterolemia, autosomal dominant, 3 (ClinVar).

How common is PCSK9 p.Ser262= (c.786C>T) in the general population?

PCSK9 p.Ser262= (c.786C>T) is ultra-rare (popmax 0.0201%, eas) (gnomAD).

PCSK9 p.Ser262=

c.786C>T · rs763759839 · VCV926530

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0201%, eas)

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.075	GERP 0.73, phastCons 0.022
Overall
CADD	13.29	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0201% East Asian · 9/44,886 alleles

Filtering AF 0.0104% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00785%

Overall 0.00223% 36/1,612,978 alleles · ultra-rare exomes 26/1,460,760 · genomes 10/152,218 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0201%	4,987
Admixed American	0.0183%	5,455
South Asian	0.00549%	18,216
African / African-American	0.00267%	37,465
Finnishnot grpmax-eligible	0.00159%	63,046
European (non-Finnish)	0.000678%	147,497

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PCSK9
Protein: p.Ser262=
Coding: c.786C>T
MANE Select: NM_174936
dbSNP: rs763759839
Type: single nucleotide variant
Location: chr1:55052778 (GRCh38)
Gene constraint: LOEUF 1.25 · pLI <0.01 · ClinGen HI dosage-sensitivity unlikely (gnomAD)
Structure: AlphaFold pLDDT 85.03 · 66 PDB
Residue 262: an α-helix; the peptidase s8 domain

Full PCSK9 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: familial hypercholesterolemia hypercholesterolemia, autosomal dominant, 3

Similar variants

PCSK9 p.Arg215His Pathogenic/Likely pathogenic ★★ ⚠ same condition
PCSK9 p.Asp374His Pathogenic/Likely pathogenic ★★ ⚠ same condition
PCSK9 p.Asp374Tyr Pathogenic/Likely pathogenic ★★ ⚠ same condition
PCSK9 c.1863+1G>A Uncertain significance ★★ same condition
PCSK9 c.1864-12G>A Uncertain significance ★★ same condition
PCSK9 c.207+5G>A Uncertain significance ★★ same condition
PCSK9 c.207+6G>C Uncertain significance ★★ same condition
PCSK9 c.208-6G>A Uncertain significance ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/pcsk9-p-ser262 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown