Is CCSER2 p.Pro781Ser (c.2341C>T) pathogenic?

CCSER2 p.Pro781Ser (c.2341C>T) is classified Uncertain significance in CCSER2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-01-23). AlphaMissense: likely benign (0.1369); Ultra-rare (popmax 0.0241%, afr).

How common is CCSER2 p.Pro781Ser (c.2341C>T) in the general population?

CCSER2 p.Pro781Ser (c.2341C>T) is ultra-rare (popmax 0.0241%, afr) (gnomAD).

What do computational predictors say about CCSER2 p.Pro781Ser (c.2341C>T)?

AlphaMissense predicts likely benign (score 0.1369) — an in-silico prediction, not a clinical call.

CCSER2 p.Pro781Ser

c.2341C>T · rs866188943 · VCV2477749

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1369 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0241%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1369	likely benign
REVEL	0.128	moderately benign-leaning
SaProt	LLR -6.34	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 4.9	GERP 2.2, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 143 kb · p 0.88 · regional, not allelic
Overall
CADD	24.1	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 A809V vs ClinVar P781S) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0241% African / African-American · 18/74,612 alleles

Filtering AF 0.0155% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0129%

Overall 0.00124% 20/1,608,322 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0241%	4,145
Admixed American	0.00169%	59,242
European (non-Finnish)	8.5e-05%	1,176,990

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: CCSER2
Protein: p.Pro781Ser
Coding: c.2341C>T
MANE Select: NM_001284240
dbSNP: rs866188943
Type: single nucleotide variant
Location: chr10:84513464 (GRCh38)
Gene constraint: LOEUF 0.589 · pLI 0.07 (gnomAD)
Structure: AlphaFold pLDDT 48.62
Residue 781: the 'disordered' region

Full CCSER2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CCSER2 c.2326-13498G>A Uncertain significance ★ ⚠ same type
CCSER2 c.2326-13517C>T Uncertain significance ★ ⚠ same type
CCSER2 c.2326-13535T>G Uncertain significance ★ ⚠ same type
CCSER2 c.2326-13543G>T Uncertain significance ★ ⚠ same type
CCSER2 c.2326-13552T>C Uncertain significance ★ ⚠ same type
CCSER2 c.2326-13556T>C Uncertain significance ★ ⚠ same type
CCSER2 c.2326-13558C>T Uncertain significance ★ same type
CCSER2 p.Ala125Gly Uncertain significance ★ ⚠ same type

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/ccser2-p-pro781ser (accessed [today's date]).

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