Is CDKN1C p.Pro187Arg (c.560C>G) pathogenic?

CDKN1C p.Pro187Arg (c.560C>G) is classified Uncertain significance in CDKN1C (ClinVar, Single submitter, 1 submitter; last evaluated 2023-09-29). AlphaMissense: likely benign (0.2933); Ultra-rare (popmax 0.0201%, eas); Associated with Beckwith-Wiedemann syndrome.

What condition is associated with CDKN1C p.Pro187Arg (c.560C>G)?

CDKN1C p.Pro187Arg (c.560C>G) is associated with Beckwith-Wiedemann syndrome (ClinVar).

How common is CDKN1C p.Pro187Arg (c.560C>G) in the general population?

CDKN1C p.Pro187Arg (c.560C>G) is ultra-rare (popmax 0.0201%, eas) (gnomAD).

What do computational predictors say about CDKN1C p.Pro187Arg (c.560C>G)?

AlphaMissense predicts likely benign (score 0.2933) — an in-silico prediction, not a clinical call.

CDKN1C p.Pro187Arg

c.560C>G · rs2583439 · VCV645140

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2933 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0201%, eas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Beckwith-Wiedemann syndrome

Computational evidence

Protein change
AlphaMissense	0.2933	likely benign
REVEL	0.014	strongly benign-leaning
SaProt	LLR -12.14	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 0.46	GERP -0.69
Overall
CADD	12.01	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 P198R vs ClinVar P187R) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0201% East Asian · 2/9,968 alleles

Filtering AF 0.0035% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00143%

Overall 0.000227% 2/880,598 alleles · ultra-rare exomes 0/735,250 · genomes 2/145,348 · joint denominator

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.Pro187Arg
Coding: c.560C>G
MANE Select: NM_001122630
dbSNP: rs2583439
Type: single nucleotide variant
Location: chr11:2884897 (GRCh38)
Gene constraint: LOEUF 1.943 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 63.93
Residue 198 UniProt numbering: 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

Disease context

Beckwith-Wiedemann syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CDKN1C p.Pro187Leu Uncertain significance ★★ ⚠ same residue
CDKN1C p.Pro187Ser Uncertain significance ★ ⚠ same residue
CDKN1C p.Pro187= Likely benign ★ same residue
CDKN1C p.Asp263Asn Pathogenic ★★ ⚠ same condition
CDKN1C p.Cys19Ter Pathogenic/Likely pathogenic ★★ same condition
CDKN1C p.Gln219Ter Pathogenic ★★ same condition
CDKN1C p.Gln221Ter Pathogenic ★★ same condition
CDKN1C p.Gln230Ter Pathogenic ★★ same condition

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-pro187arg (accessed [today's date]).

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