Is AHNAK2 p.Arg319Lys (c.956G>A) pathogenic?

AHNAK2 p.Arg319Lys (c.956G>A) is classified Uncertain significance in AHNAK2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-12-21). AlphaMissense: likely benign (0.1514); Ultra-rare (popmax 0.0164%, mid).

How common is AHNAK2 p.Arg319Lys (c.956G>A) in the general population?

AHNAK2 p.Arg319Lys (c.956G>A) is ultra-rare (popmax 0.0164%, mid) (gnomAD).

What do computational predictors say about AHNAK2 p.Arg319Lys (c.956G>A)?

AlphaMissense predicts likely benign (score 0.1514) — an in-silico prediction, not a clinical call.

AHNAK2 p.Arg319Lys

c.956G>A · rs750410805 · VCV2338953

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1514 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0164%, mid)

Missense predictors

0/2 damaging

AlphaMissense, REVEL · SaProt no call

Computational evidence

Protein change
AlphaMissense	0.1514	likely benign
REVEL	0.045	moderately benign-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this tolerated; SaProt makes no call.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -0.42	GERP 0.78
Regional constraint	o/e 1.23	unconstrained · MANE · 32 kb · p 4.7e-50 · regional, not allelic
Overall
CADD	9.901	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 is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0164% Middle Eastern · 1/6,082 alleles

Filtering AF 0.000554% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000211%

Overall 0.00093% 15/1,612,512 alleles · ultra-rare exomes 13/1,460,310 · genomes 2/152,202 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0164%	6,082
Admixed American	0.00334%	29,959
Remaining individualsnot grpmax-eligible	0.0032%	31,215
South Asian	0.0022%	45,463
European (non-Finnish)	0.000678%	147,448

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: AHNAK2
Protein: p.Arg319Lys
Coding: c.956G>A
MANE Select: NM_138420
dbSNP: rs750410805
Type: single nucleotide variant
Location: chr14:104954495 (GRCh38)
Gene constraint: LOEUF 0.917 · pLI <0.01 (gnomAD)
Residue 319: the 'disordered' region

Full AHNAK2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

AHNAK2 p.Glu3598Lys Uncertain significance ★★ ⚠ same type
AHNAK2 p.Gly4376Ser Uncertain significance ★★ ⚠ same type
AHNAK2 p.Lys2479Arg Uncertain significance ★★ ⚠ same type
AHNAK2 p.Lys3309Asn Uncertain significance ★★ ⚠ same type
AHNAK2 p.Val1351Met Uncertain significance ★★ ⚠ same type
AHNAK2 p.Ala1115Val Benign/Likely benign ★★ same type
AHNAK2 p.Ala1323Thr Likely benign ★★ same type
AHNAK2 p.Ala1818Thr Benign/Likely benign ★★ 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/ahnak2-p-arg319lys (accessed [today's date]).

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