Is CERK p.Ser278Arg (c.834C>A) pathogenic?

CERK p.Ser278Arg (c.834C>A) is classified Uncertain significance in CERK (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-11). AlphaMissense: likely benign (0.1707); Very rare (popmax 0.004%, afr).

How common is CERK p.Ser278Arg (c.834C>A) in the general population?

CERK p.Ser278Arg (c.834C>A) is very rare (popmax 0.004%, afr) (gnomAD).

What do computational predictors say about CERK p.Ser278Arg (c.834C>A)?

AlphaMissense predicts likely benign (score 0.1707) — an in-silico prediction, not a clinical call.

CERK p.Ser278Arg

c.834C>A · VCV4652644

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1707 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.004%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1707	likely benign
REVEL	0.054	moderately benign-leaning
SaProt	LLR -6.29	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.4	GERP 1.4, phastCons 0.002
Regional constraint	o/e 0.94	unconstrained · MANE · 51 kb · p 0.099 · regional, not allelic
Overall
CADD	17.74	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.004% African / African-American · 3/74,950 alleles

Filtering AF 0.00106% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00065%

Overall 0.0013% 21/1,614,034 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.004%	24,983
Admixed American	0.00167%	60,006
Remaining individualsnot grpmax-eligible	0.0016%	62,482
European (non-Finnish)	0.00136%	73,748

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: CERK
Protein: p.Ser278Arg
Coding: c.834C>A
MANE Select: NM_022766
Type: single nucleotide variant
Location: chr22:46699422 (GRCh38)
Gene constraint: LOEUF 0.829 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 88.86
Residue 278: the dagkc domain

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

Similar variants

CERK p.His113= Benign ★★ same type
CERK p.Pro509= Benign ★★ same type
CERK p.Thr461Met Benign ★★ same type
CERK p.Ala215Thr Uncertain significance ★ ⚠ same type
CERK p.Ala215Val Uncertain significance ★ ⚠ same type
CERK p.Ala238Ser Uncertain significance ★ ⚠ same type
CERK p.Ala238Thr Uncertain significance ★ ⚠ same type
CERK p.Ala254Thr Uncertain significance ★ ⚠ 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/cerk-p-ser278arg (accessed [today's date]).

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