Is SRCAP p.Leu266Pro (c.797T>C) pathogenic?

SRCAP p.Leu266Pro (c.797T>C) is classified Uncertain significance in SRCAP (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-04-24). AlphaMissense: likely benign (0.0722); Absent from gnomAD v4.1; Associated with Floating-Harbor syndrome.

What condition is associated with SRCAP p.Leu266Pro (c.797T>C)?

SRCAP p.Leu266Pro (c.797T>C) is associated with Floating-Harbor syndrome, developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities (ClinVar).

How common is SRCAP p.Leu266Pro (c.797T>C) in the general population?

SRCAP p.Leu266Pro (c.797T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SRCAP p.Leu266Pro (c.797T>C)?

AlphaMissense predicts likely benign (score 0.0722) — an in-silico prediction, not a clinical call.

SRCAP p.Leu266Pro

c.797T>C · rs2052866713 · VCV3169849

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0722 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Floating-Harbor syndrome

Computational evidence

Protein change
AlphaMissense	0.0722	likely benign
REVEL	0.424	indeterminate
SaProt	—	not scored · why
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.9	GERP 2.7, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 217 bp · p 0.87 · regional, not allelic
Overall
CADD	21.5	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

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: SRCAP
Protein: p.Leu266Pro
Coding: c.797T>C
MANE Select: NM_006662
dbSNP: rs2052866713
Type: single nucleotide variant
Location: chr16:30709676 (GRCh38)
Gene constraint: LOEUF 0.223 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Residue 266: the 'disordered' region

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

Disease context

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

Also linked: developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities

Similar variants

SRCAP p.Leu266= Likely benign ★ same residue
SRCAP p.Arg2329Ter Pathogenic/Likely pathogenic ★★ same condition
SRCAP p.Arg2435Ter Pathogenic/Likely pathogenic ★★ same condition
SRCAP p.Arg2444Ter Pathogenic ★★ same condition
SRCAP p.Arg2718Ter Pathogenic/Likely pathogenic ★★ same condition
SRCAP p.Arg2748Ter Pathogenic ★★ same condition
SRCAP p.Gln2407Ter Pathogenic ★★ same condition
SRCAP p.Gln2419Ter 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/srcap-p-leu266pro (accessed [today's date]).

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