Is CASP10 p.Ser266Phe (c.797C>T) pathogenic?

CASP10 p.Ser266Phe (c.797C>T) is classified Uncertain significance in CASP10 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-08-04). AlphaMissense: likely benign (0.1333); Ultra-rare (popmax 0.0307%, afr); Associated with autoimmune lymphoproliferative syndrome type 2A.

What condition is associated with CASP10 p.Ser266Phe (c.797C>T)?

CASP10 p.Ser266Phe (c.797C>T) is associated with autoimmune lymphoproliferative syndrome type 2A (ClinVar).

How common is CASP10 p.Ser266Phe (c.797C>T) in the general population?

CASP10 p.Ser266Phe (c.797C>T) is ultra-rare (popmax 0.0307%, afr) (gnomAD).

How is Autoimmune lymphoproliferative syndrome inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about CASP10 p.Ser266Phe (c.797C>T)?

AlphaMissense predicts likely benign (score 0.1333) — an in-silico prediction, not a clinical call.

CASP10 p.Ser266Phe

c.797C>T · rs148554420 · VCV849666

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1333 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0307%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

autoimmune lymphoproliferative syndrome type 2A

Computational evidence

Protein change
AlphaMissense	0.1333	likely benign
REVEL	0.072	moderately benign-leaning
SaProt	LLR -8.44	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 0.32	GERP -1, phastCons 0.003
Regional constraint	o/e 1.00	unconstrained · MANE · 32 kb · p 0.98 · regional, not allelic
Overall
CADD	1.835	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.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0307% African / African-American · 23/74,980 alleles

Filtering AF 0.021% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0178%

Overall 0.00149% 24/1,611,216 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0307%	3,260
Admixed American	0.00167%	60,008

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: CASP10
Protein: p.Ser266Phe
Coding: c.797C>T
MANE Select: NM_032977
dbSNP: rs148554420
Type: single nucleotide variant
Location: chr2:201205957 (GRCh38)
Gene constraint: LOEUF 1.046 · pLI <0.01 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 69.54
Residue 266: the 'disordered' region

Full CASP10 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autoimmune lymphoproliferative syndrome type 2A — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autoimmune lymphoproliferative syndrome (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive
Onset: All ages

Similar variants

CASP10 c.1415+2T>C Uncertain significance ★★ same condition
CASP10 c.1416-3C>A Uncertain significance ★★ same condition
CASP10 c.347+2T>G Uncertain significance ★★ same condition
CASP10 c.684+1G>A Uncertain significance ★★ same condition
CASP10 c.922+5G>A Uncertain significance ★★ same condition
CASP10 p.Ala237Glu Uncertain significance ★★ ⚠ same condition
CASP10 p.Ala248Val Uncertain significance ★★ ⚠ same condition
CASP10 p.Ala259Thr Uncertain significance ★★ ⚠ 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/casp10-p-ser266phe (accessed [today's date]).

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