Is CMPK2 p.Leu176Phe (c.526C>T) pathogenic?

CMPK2 p.Leu176Phe (c.526C>T) is classified Uncertain significance in CMPK2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-08). AlphaMissense: likely benign (0.1701); Ultra-rare (popmax 0.0171%, mid).

How common is CMPK2 p.Leu176Phe (c.526C>T) in the general population?

CMPK2 p.Leu176Phe (c.526C>T) is ultra-rare (popmax 0.0171%, mid) (gnomAD).

What do computational predictors say about CMPK2 p.Leu176Phe (c.526C>T)?

AlphaMissense predicts likely benign (score 0.1701) — an in-silico prediction, not a clinical call.

CMPK2 p.Leu176Phe

c.526C>T · VCV4654720

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1701 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0171%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1701	likely benign
REVEL	0.119	moderately benign-leaning
SaProt	LLR -9.54	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.052	GERP -3.3
Regional constraint	o/e 1.09	unconstrained · MANE · 16 kb · p 0.024 · regional, not allelic
Overall
CADD	15.26	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 0.0171% Middle Eastern · 1/5,864 alleles

Overall 0.00013% 2/1,535,930 alleles · ultra-rare exomes 2/1,383,554 · genomes 0/152,376 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0171%	5,864
European (non-Finnish)	8.74e-05%	1,143,524

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: CMPK2
Protein: p.Leu176Phe
Coding: c.526C>T
MANE Select: NM_207315
Type: single nucleotide variant
Location: chr2:6865171 (GRCh38)
Gene constraint: LOEUF 1.708 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 87.26

Full CMPK2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CMPK2 p.Ala156Thr Uncertain significance ★ ⚠ same type
CMPK2 p.Ala24Gly Uncertain significance ★ ⚠ same type
CMPK2 p.Ala2Val Uncertain significance ★ ⚠ same type
CMPK2 p.Ala49Ser Uncertain significance ★ ⚠ same type
CMPK2 p.Ala49Thr Uncertain significance ★ ⚠ same type
CMPK2 p.Ala4Ser Uncertain significance ★ ⚠ same type
CMPK2 p.Ala4Val Uncertain significance ★ ⚠ same type
CMPK2 p.Ala51Thr 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/cmpk2-p-leu176phe (accessed [today's date]).

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