Is SRCAP p.Pro1857Ser (c.5569C>T) pathogenic?

SRCAP p.Pro1857Ser (c.5569C>T) is classified Uncertain significance in SRCAP (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-06-18). AlphaMissense: likely benign (0.1493); Very rare (popmax 0.00329%, sas); Associated with developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities.

How common is SRCAP p.Pro1857Ser (c.5569C>T) in the general population?

SRCAP p.Pro1857Ser (c.5569C>T) is very rare (popmax 0.00329%, sas) (gnomAD).

What do computational predictors say about SRCAP p.Pro1857Ser (c.5569C>T)?

AlphaMissense predicts likely benign (score 0.1493) — an in-silico prediction, not a clinical call.

SRCAP p.Pro1857Ser

Q: What condition is associated with SRCAP p.Pro1857Ser (c.5569C>T)?

SRCAP p.Pro1857Ser (c.5569C>T) is associated with developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities, Floating-Harbor syndrome (ClinVar).

c.5569C>T · rs780703722 · VCV2059812

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1493 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00329%, sas)

Conditions

developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities

Computational evidence

Protein change
AlphaMissense	0.1493	likely benign
REVEL	0.317	indeterminate
SaProt	—	not scored · why
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 2.7, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 8,776 bp · p 0.24 · regional, not allelic
Overall
CADD	23.5	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

Grpmax group 0.00329% South Asian · 3/91,080 alleles

Filtering AF 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000443%

Overall 0.000372% 6/1,614,002 alleles · very rare exomes 6/1,461,774 · genomes 0/152,228 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00329%	30,360
European (non-Finnish)	0.000254%	393,324

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: SRCAP
Protein: p.Pro1857Ser
Coding: c.5569C>T
MANE Select: NM_006662
dbSNP: rs780703722
Type: single nucleotide variant
Location: chr16:30724993 (GRCh38)
Gene constraint: LOEUF 0.223 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Residue 1857: the 'disordered' region; a UniProt-annotated variant site (in dehmba)

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

Disease context

developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Floating-Harbor syndrome

Similar variants

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
SRCAP p.Gln2665Ter Pathogenic/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/srcap-p-pro1857ser (accessed [today's date]).

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