Is ALS2 p.His271Tyr (c.811C>T) pathogenic?

ALS2 p.His271Tyr (c.811C>T) is classified Uncertain significance in ALS2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-01-04). AlphaMissense: likely benign (0.0731); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with ALS2 p.His271Tyr (c.811C>T)?

ALS2 p.His271Tyr (c.811C>T) is associated with Inborn genetic diseases (ClinVar).

How common is ALS2 p.His271Tyr (c.811C>T) in the general population?

ALS2 p.His271Tyr (c.811C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ALS2 p.His271Tyr (c.811C>T)?

AlphaMissense predicts likely benign (score 0.0731) — an in-silico prediction, not a clinical call.

ALS2 p.His271Tyr

c.811C>T · rs1166536685 · VCV2269447

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0731 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0731	likely benign
REVEL	0.05	moderately benign-leaning
SaProt	LLR -7.52	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 9.5	GERP 0.97, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 11 kb · p 0.0064 · regional, not allelic
Overall
CADD	21.8	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: ALS2
Protein: p.His271Tyr
Coding: c.811C>T
MANE Select: NM_020919
dbSNP: rs1166536685
Type: single nucleotide variant
Location: chr2:201761183 (GRCh38)
Gene constraint: LOEUF 0.649 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 74.69

Full ALS2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ALS2 p.His271Arg Uncertain significance ★★ ⚠ same residue
ALS2 p.Arg1139Ter Pathogenic/Likely pathogenic ★★ same condition
ALS2 p.Ala333Ser Uncertain significance ★★ ⚠ same condition
ALS2 p.Ala377Thr Uncertain significance ★★ ⚠ same condition
ALS2 p.Ala402Thr Uncertain significance ★★ ⚠ same condition
ALS2 p.Arg1329Trp Uncertain significance ★★ ⚠ same condition
ALS2 p.Arg1330His Uncertain significance ★★ ⚠ same condition
ALS2 p.Arg1405Cys 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/als2-p-his271tyr (accessed [today's date]).

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