Is CCNQ p.Pro208Ser (c.622C>T) pathogenic?

CCNQ p.Pro208Ser (c.622C>T) is classified Uncertain significance in CCNQ (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-12). AlphaMissense: likely pathogenic (0.6681); Absent from gnomAD v4.1.

How common is CCNQ p.Pro208Ser (c.622C>T) in the general population?

CCNQ p.Pro208Ser (c.622C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CCNQ p.Pro208Ser (c.622C>T)?

AlphaMissense predicts likely pathogenic (score 0.6681) — an in-silico prediction, not a clinical call.

CCNQ p.Pro208Ser

c.622C>T · VCV3264600

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.6681 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.6681	likely pathogenic
REVEL	0.29	benign-leaning
SaProt	LLR -10.77	damaging
⇒ AlphaMissense and SaProt call this damaging; REVEL does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.8	GERP 1.7, phastCons 1
Regional constraint	o/e 0.66	unconstrained · MANE · 11 kb · p 2.8e-07 · regional, not allelic
Overall
CADD	23.3	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CCNQ
Protein: p.Pro208Ser
Coding: c.622C>T
MANE Select: NM_152274
Type: single nucleotide variant
Location: chrX:153592541 (GRCh38)
Structure: AlphaFold pLDDT 88.81

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

Similar variants

CCNQ c.113-85T>C Benign ★★ same type
CCNQ c.296+72C>T Benign ★★ same type
CCNQ c.297-320A>G Benign ★★ same type
CCNQ c.429+171C>T Benign ★★ same type
CCNQ c.429+8C>T Benign ★★ same type
CCNQ c.430-12G>A Benign/Likely benign ★★ same type
CCNQ c.657+144C>T Benign ★★ same type
CCNQ p.Ala209= Benign/Likely benign ★★ 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/ccnq-p-pro208ser (accessed [today's date]).

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