Is ATRN p.Ala87Val (c.260C>T) pathogenic?

ATRN p.Ala87Val (c.260C>T) is classified Uncertain significance in ATRN (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-07-16). AlphaMissense: likely benign (0.1328); Very rare (popmax 0.0056%, nfe).

How common is ATRN p.Ala87Val (c.260C>T) in the general population?

ATRN p.Ala87Val (c.260C>T) is very rare (popmax 0.0056%, nfe) (gnomAD).

What do computational predictors say about ATRN p.Ala87Val (c.260C>T)?

AlphaMissense predicts likely benign (score 0.1328) — an in-silico prediction, not a clinical call.

ATRN p.Ala87Val

c.260C>T · rs542464289 · VCV2076029

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1328 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0056%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1328	likely benign
REVEL	0.089	moderately benign-leaning
SaProt	LLR -8.99	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 3	GERP 0.41, phastCons 1
Regional constraint	o/e 0.89	unconstrained · MANE · 106 kb · p 0.00041 · regional, not allelic
Overall
CADD	20.7	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 0.0056% European (non-Finnish) · 63/1,125,968 alleles

Filtering AF 0.00447% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00406%

Overall 0.00479% 71/1,482,096 alleles · very rare

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0105%	9,564
European (non-Finnish)grpmax	0.0056%	17,872
Admixed American	0.00487%	20,533

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: ATRN
Protein: p.Ala87Val
Coding: c.260C>T
MANE Select: NM_139321
dbSNP: rs542464289
Type: single nucleotide variant
Location: chr20:3471367 (GRCh38)
Gene constraint: LOEUF 0.395 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 79.27

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

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ATRN p.Asn300Thr Uncertain significance ★★ ⚠ same type
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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/atrn-p-ala87val (accessed [today's date]).

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