Is CDKN1C p.Pro183Leu (c.548C>T) pathogenic?

CDKN1C p.Pro183Leu (c.548C>T) is classified Uncertain significance in CDKN1C (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-03). AlphaMissense: likely benign (0.1937); Very rare (popmax 0.000413%, nfe); Associated with Beckwith-Wiedemann syndrome.

What condition is associated with CDKN1C p.Pro183Leu (c.548C>T)?

CDKN1C p.Pro183Leu (c.548C>T) is associated with Beckwith-Wiedemann syndrome (ClinVar).

How common is CDKN1C p.Pro183Leu (c.548C>T) in the general population?

CDKN1C p.Pro183Leu (c.548C>T) is very rare (popmax 0.000413%, nfe) (gnomAD).

What do computational predictors say about CDKN1C p.Pro183Leu (c.548C>T)?

AlphaMissense predicts likely benign (score 0.1937) — an in-silico prediction, not a clinical call.

CDKN1C p.Pro183Leu

c.548C>T · rs1458423964 · VCV1396930

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1937 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000413%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Beckwith-Wiedemann syndrome

Computational evidence

Protein change
AlphaMissense	0.1937	likely benign
REVEL	0.108	moderately benign-leaning
SaProt	LLR -9.81	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 0.34	GERP -0.79, phastCons 0.003
Overall
CADD	11.1	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 P194L vs ClinVar P183L) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000413% European (non-Finnish) · 3/726,118 alleles

Filtering AF 0.00011% ClinGen BA1/BS1 input FAF95, joint · FAF99 3.1e-05%

Overall 0.000339% 3/883,778 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.Pro183Leu
Coding: c.548C>T
MANE Select: NM_001122630
dbSNP: rs1458423964
Type: single nucleotide variant
Location: chr11:2884909 (GRCh38)
Gene constraint: LOEUF 1.943 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 63.93
Residue 183: the '9 x 4 aa repeats of p-a-p-a' region; the 'disordered' region; a UniProt-annotated variant site (in hepatocellular carcinomas)

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.Pro183= Likely benign ★ same residue
CDKN1C p.Pro183fs Pathogenic ★ same residue
CDKN1C p.Pro183_Val184insAlaProAlaProAlaProAlaProAlaPro Uncertain significance ★ same residue
CDKN1C p.Pro183_Val184insAlaProAlaProAlaProAlaProAlaProAlaPro Uncertain significance ★ same residue
CDKN1C p.Pro183_Val184insAlaPro Likely benign ★ same residue
CDKN1C p.Pro183_Val184insAlaProAlaPro Likely benign ★ same residue
CDKN1C p.Pro183_Val184insAlaProAlaProAlaPro Likely benign ★ same residue
CDKN1C p.Asp263Asn 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-pro183leu (accessed [today's date]).

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