Is ALK p.Leu347= (c.1041G>A) pathogenic?

ALK p.Leu347= (c.1041G>A) is classified Likely benign in ALK (ClinVar, Single submitter, 1 submitter; last evaluated 2019-11-24). Very rare (popmax 0.00892%, eas); Associated with hereditary neoplastic syndrome.

What condition is associated with ALK p.Leu347= (c.1041G>A)?

ALK p.Leu347= (c.1041G>A) is associated with hereditary neoplastic syndrome (ClinVar).

How common is ALK p.Leu347= (c.1041G>A) in the general population?

ALK p.Leu347= (c.1041G>A) is very rare (popmax 0.00892%, eas) (gnomAD).

ALK p.Leu347=

c.1041G>A · rs1673133948 · VCV1774298

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00892%, eas)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 3.3	GERP 0.98, phastCons 1
Overall
CADD	7.713	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00892% East Asian · 4/44,862 alleles

Filtering AF 0.00298% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0018%

Overall 0.000248% 4/1,614,104 alleles · very rare exomes 4/1,461,852 · genomes 0/152,252 · joint denominator

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: ALK
Protein: p.Leu347=
Coding: c.1041G>A
MANE Select: NM_004304
dbSNP: rs1673133948
Type: single nucleotide variant
Location: chr2:29532028 (GRCh38)
Gene constraint: LOEUF 0.562 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 68.26 · 79 PDB
Residue 347: the mam 1 domain

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ALK p.Leu347Met 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
ALK c.1415-3T>C 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-leu347 (accessed [today's date]).

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