Is CREBBP p.Pro901Leu (c.2702C>T) pathogenic?

CREBBP p.Pro901Leu (c.2702C>T) is classified Benign/Likely benign in CREBBP (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-06-24). AlphaMissense: likely benign (0.1204); Very rare (popmax 0.00329%, sas); Associated with Rubinstein-Taybi syndrome.

What condition is associated with CREBBP p.Pro901Leu (c.2702C>T)?

CREBBP p.Pro901Leu (c.2702C>T) is associated with Rubinstein-Taybi syndrome, Rubinstein-Taybi syndrome due to CREBBP mutations, Menke-Hennekam syndrome 1 (ClinVar).

How common is CREBBP p.Pro901Leu (c.2702C>T) in the general population?

CREBBP p.Pro901Leu (c.2702C>T) is very rare (popmax 0.00329%, sas) (gnomAD).

What do computational predictors say about CREBBP p.Pro901Leu (c.2702C>T)?

AlphaMissense predicts likely benign (score 0.1204) — an in-silico prediction, not a clinical call.

CREBBP p.Pro901Leu

c.2702C>T · rs1485287458 · VCV2057452

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1204 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00329%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Rubinstein-Taybi syndrome

Computational evidence

Protein change
AlphaMissense	0.1204	likely benign
REVEL	0.598	indeterminate
SaProt	LLR -8.38	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.8, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 19 kb · p 0.52 · regional, not allelic
Overall
CADD	26.4	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

Grpmax group 0.00329% South Asian · 3/91,082 alleles

Filtering AF 0.00199% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00175%

Overall 0.00235% 38/1,613,980 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00329%	30,361
European (non-Finnish)	0.0028%	35,758
African / African-American	0.00267%	37,453

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: CREBBP
Protein: p.Pro901Leu
Coding: c.2702C>T
MANE Select: NM_004380
dbSNP: rs1485287458
Type: single nucleotide variant
Location: chr16:3770748 (GRCh38)
Gene constraint: LOEUF 0.101 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 54.31 · 144 PDB
Residue 901: the 'disordered' region

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

Disease context

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

Also linked: Rubinstein-Taybi syndrome due to CREBBP mutations Menke-Hennekam syndrome 1

Similar variants

CREBBP p.Pro901= Likely benign ★★ same residue
CREBBP p.Pro901Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
CREBBP c.2881-13G>A Pathogenic/Likely pathogenic ★★ same condition
CREBBP c.3369+1G>T Pathogenic/Likely pathogenic ★★ same condition
CREBBP c.3779+1G>A Pathogenic ★★ same condition
CREBBP c.3779+1G>T Pathogenic ★★ same condition
CREBBP c.3836+1G>A Pathogenic ★★ same condition
CREBBP c.3914+3G>T Likely 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/crebbp-p-pro901leu (accessed [today's date]).

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