Is THOC2 p.Cys97Ser (c.289T>A) pathogenic?

THOC2 p.Cys97Ser (c.289T>A) is classified Uncertain significance in THOC2 (ClinVar, Single submitter, 1 submitter; last evaluated 2020-03-01). AlphaMissense: likely benign (0.2322); Absent from gnomAD v4.1.

How common is THOC2 p.Cys97Ser (c.289T>A) in the general population?

THOC2 p.Cys97Ser (c.289T>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about THOC2 p.Cys97Ser (c.289T>A)?

AlphaMissense predicts likely benign (score 0.2322) — an in-silico prediction, not a clinical call.

THOC2 p.Cys97Ser

c.289T>A · rs2050501566 · VCV916139

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2322 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2322	likely benign
REVEL	0.141	moderately benign-leaning
SaProt	LLR -4.10	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 11	GERP 2.5, phastCons 1
Regional constraint	o/e 0.72	unconstrained · MANE · 35 kb · p 0.011 · regional, not allelic
Overall
CADD	22.1	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.

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: THOC2
Protein: p.Cys97Ser
Coding: c.289T>A
MANE Select: NM_001081550
dbSNP: rs2050501566
Type: single nucleotide variant
Location: chrX:123697737 (GRCh38)
Structure: AlphaFold pLDDT 72.83 · 4 PDB
Residue 97: the 'anchor domain; interaction with thoc5 and thoc7' region; an α-helix

Full THOC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

THOC2 p.Cys615Tyr Likely pathogenic ★★ same type
THOC2 p.Thr696Ile Pathogenic/Likely pathogenic ★★ same type
THOC2 p.Ala912Pro Uncertain significance ★★ ⚠ same type
THOC2 p.Arg1307Trp Uncertain significance ★★ ⚠ same type
THOC2 p.Arg1468Lys Uncertain significance ★★ ⚠ same type
THOC2 p.Asn208Ser Uncertain significance ★★ ⚠ same type
THOC2 p.Asn414Tyr Uncertain significance ★★ ⚠ same type
THOC2 p.Asn666Ser 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/thoc2-p-cys97ser (accessed [today's date]).

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