Is COMP p.Glu278Lys (c.832G>A) pathogenic?

COMP p.Glu278Lys (c.832G>A) is classified Likely benign in COMP (ClinVar, Single submitter, 1 submitter; last evaluated 2025-05-12). AlphaMissense: likely benign (0.096); Very rare (popmax 0.00154%, nfe).

How common is COMP p.Glu278Lys (c.832G>A) in the general population?

COMP p.Glu278Lys (c.832G>A) is very rare (popmax 0.00154%, nfe) (gnomAD).

What do computational predictors say about COMP p.Glu278Lys (c.832G>A)?

AlphaMissense predicts likely benign (score 0.096) — an in-silico prediction, not a clinical call.

COMP p.Glu278Lys

c.832G>A · rs756649872 · VCV1052324

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.096 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00154%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.096	likely benign
REVEL	0.745	pathogenic-leaning
SaProt	LLR -6.71	tolerated
⇒ REVEL calls this damaging; AlphaMissense and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.2	GERP -4, phastCons 1
Regional constraint	o/e 0.84	unconstrained · MANE · 8,351 bp · p 2.2e-07 · regional, not allelic
Overall
CADD	24.3	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00154% European (non-Finnish) · 18/1,165,332 alleles

Filtering AF 0.000965% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000796%

Overall 0.00139% 22/1,587,608 alleles · very rare

Ancestry group	Frequency	1 in
Ashkenazi Jewishnot grpmax-eligible	0.00348%	28,772
Remaining individualsnot grpmax-eligible	0.00164%	60,890
European (non-Finnish)grpmax	0.00154%	64,741
African / African-American	0.00135%	73,836
South Asian	0.00111%	90,496

Ashkenazi Jewish shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: COMP
Protein: p.Glu278Lys
Coding: c.832G>A
MANE Select: NM_000095
dbSNP: rs756649872
Type: single nucleotide variant
Location: chr19:18788445 (GRCh38)
Gene constraint: LOEUF 1.073 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 88.60 · 1 PDB

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

Similar variants

COMP p.Glu278Gln Uncertain significance ★ ⚠ same residue
COMP p.Arg718Trp Pathogenic/Likely pathogenic ★★ same type
COMP p.Asn489Lys Pathogenic/Likely pathogenic ★★ same type
COMP p.Asn523Lys Pathogenic/Likely pathogenic ★★ ⚠ same type
COMP p.Asn555Lys Pathogenic/Likely pathogenic ★★ same type
COMP p.Asp269Gly Pathogenic/Likely pathogenic ★★ same type
COMP p.Asp273Val Likely pathogenic ★★ same type
COMP p.Asp326Asn Pathogenic/Likely pathogenic ★★ same type

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/comp-p-glu278lys (accessed [today's date]).

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