Is ALK p.Leu274Pro (c.821T>C) pathogenic?

ALK p.Leu274Pro (c.821T>C) is classified Uncertain significance in ALK (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-06). AlphaMissense: likely pathogenic (0.9872); Absent from gnomAD v4.1; Associated with neuroblastoma, susceptibility to, 3.

What condition is associated with ALK p.Leu274Pro (c.821T>C)?

ALK p.Leu274Pro (c.821T>C) is associated with neuroblastoma, susceptibility to, 3 (ClinVar).

How common is ALK p.Leu274Pro (c.821T>C) in the general population?

ALK p.Leu274Pro (c.821T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ALK p.Leu274Pro (c.821T>C)?

AlphaMissense predicts likely pathogenic (score 0.9872) — an in-silico prediction, not a clinical call.

ALK p.Leu274Pro

c.821T>C · VCV3586404

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9872 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

neuroblastoma, susceptibility to, 3

Computational evidence

Protein change
AlphaMissense	0.9872	likely pathogenic · top 10% in ALK
REVEL	0.33	indeterminate
SaProt	LLR -12.94	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 2.9, phastCons 1
Regional constraint	o/e 1.05	unconstrained · MANE · 670 kb · p 0.12 · regional, not allelic
Overall
CADD	26.6	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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: ALK
Protein: p.Leu274Pro
Coding: c.821T>C
MANE Select: NM_004304
Type: single nucleotide variant
Location: chr2:29694981 (GRCh38)
Gene constraint: LOEUF 0.562 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 68.26 · 79 PDB
Residue 274: the mam 1 domain

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

Disease context

neuroblastoma, susceptibility to, 3 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ALK p.Leu274Met Uncertain significance ★★ ⚠ same residue
ALK p.Leu274= Conflicting classifications of pathogenicity ★ same residue
ALK p.Arg1275Gln Pathogenic ★★ same condition
ALK c.1154+5G>A Uncertain significance ★★ same condition
ALK c.1155-3C>T Uncertain significance ★★ same condition
ALK c.1282+3A>G Uncertain significance ★★ same condition
ALK c.1414+1G>A Uncertain significance ★★ same condition
ALK c.1414+3G>A 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/alk-p-leu274pro (accessed [today's date]).

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