Is CDKN1C p.Pro193Ser (c.577C>T) pathogenic?

CDKN1C p.Pro193Ser (c.577C>T) is classified Uncertain significance in CDKN1C (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-11). AlphaMissense: likely benign (0.1349); Very rare (popmax 0.000261%, nfe).

How common is CDKN1C p.Pro193Ser (c.577C>T) in the general population?

CDKN1C p.Pro193Ser (c.577C>T) is very rare (popmax 0.000261%, nfe) (gnomAD).

What do computational predictors say about CDKN1C p.Pro193Ser (c.577C>T)?

AlphaMissense predicts likely benign (score 0.1349) — an in-silico prediction, not a clinical call.

CDKN1C p.Pro193Ser

c.577C>T · VCV4882612

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1349 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000261%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1349	likely benign
REVEL	0.132	moderately benign-leaning
SaProt	LLR -11.57	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -1.9	GERP -0.71
Overall
CADD	3.534	PHRED · no single calibrated threshold — expert panels disagree

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

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P204S vs ClinVar P193S) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000261% European (non-Finnish) · 2/766,144 alleles

Filtering AF 4.3e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.6e-05%

Overall 0.000256% 2/780,230 alleles · very rare

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: CDKN1C
Protein: p.Pro193Ser
Coding: c.577C>T
MANE Select: NM_001122630
Type: single nucleotide variant
Location: chr11:2884880 (GRCh38)
Gene constraint: LOEUF 1.943 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 63.93
Residue 193: the '9 x 4 aa repeats of p-a-p-a' region; the 'disordered' region

Full CDKN1C gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CDKN1C p.Pro193Leu Uncertain significance ★★ ⚠ same residue
CDKN1C p.Pro193Ala Conflicting classifications of pathogenicity ★ ⚠ same residue
CDKN1C p.Pro193Arg Uncertain significance ★ ⚠ same residue
CDKN1C p.Pro193Gln Uncertain significance ★ ⚠ same residue
CDKN1C p.Pro193= Likely benign ★ same residue
CDKN1C p.Pro193fs Pathogenic ★ same residue
CDKN1C p.Pro193_Ala194insValAla Uncertain significance ★ same residue
CDKN1C p.Arg268Ser 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/cdkn1c-p-pro193ser (accessed [today's date]).

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