Is CDYL p.Lys260Arg (c.779A>G) pathogenic?

CDYL p.Lys260Arg (c.779A>G) is classified Uncertain significance in CDYL (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-25). AlphaMissense: likely benign (0.0782); Very rare (popmax 0.00333%, amr).

How common is CDYL p.Lys260Arg (c.779A>G) in the general population?

CDYL p.Lys260Arg (c.779A>G) is very rare (popmax 0.00333%, amr) (gnomAD).

What do computational predictors say about CDYL p.Lys260Arg (c.779A>G)?

AlphaMissense predicts likely benign (score 0.0782) — an in-silico prediction, not a clinical call.

CDYL p.Lys260Arg

c.779A>G · VCV3265637

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0782 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00333%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0782	likely benign
REVEL	0.052	moderately benign-leaning
SaProt	LLR -6.37	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 7.8	GERP 2.1, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 159 kb · p 0.037 · regional, not allelic
Overall
CADD	20.6	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM K314R vs ClinVar K260R) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00333% Admixed American · 2/60,004 alleles

Filtering AF 0.000553% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000207%

Overall 0.000248% 4/1,614,072 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00333%	30,002
European (non-Finnish)	0.000169%	590,023

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: CDYL
Protein: p.Lys260Arg
Coding: c.779A>G
MANE Select: NM_004824
Type: single nucleotide variant
Location: chr6:4935602 (GRCh38)
Gene constraint: LOEUF 0.293 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 68.33 · 3 PDB
Residue 260: the 'interaction with ezh2' region

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

Similar variants

CDYL p.Ala136Val Uncertain significance ★ ⚠ same type
CDYL p.Ala154Thr Uncertain significance ★ ⚠ same type
CDYL p.Ala182Ser Uncertain significance ★ ⚠ same type
CDYL p.Ala183Val Uncertain significance ★ ⚠ same type
CDYL p.Ala195Thr Uncertain significance ★ ⚠ same type
CDYL p.Ala329Thr Uncertain significance ★ ⚠ same type
CDYL p.Ala527Ser Uncertain significance ★ ⚠ same type
CDYL p.Arg11Lys 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/cdyl-p-lys260arg (accessed [today's date]).

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