Is NACA p.Val196Ala (c.587T>C) pathogenic?

NACA p.Val196Ala (c.587T>C) is classified Uncertain significance in NACA (ClinVar, Single submitter, 1 submitter; last evaluated 2024-08-12). AlphaMissense: likely benign (0.2466); Ultra-rare (popmax 0.0773%, afr).

How common is NACA p.Val196Ala (c.587T>C) in the general population?

NACA p.Val196Ala (c.587T>C) is ultra-rare (popmax 0.0773%, afr) (gnomAD).

What do computational predictors say about NACA p.Val196Ala (c.587T>C)?

AlphaMissense predicts likely benign (score 0.2466) — an in-silico prediction, not a clinical call.

NACA p.Val196Ala

c.587T>C · VCV3402443

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2466 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0773%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2466	likely benign
REVEL	0.026	moderately benign-leaning
SaProt	LLR -6.09	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 0.35	GERP -3
Regional constraint	o/e 1.03	unconstrained · MANE · 5,320 bp · p 0.34 · regional, not allelic
Overall
CADD	2.198	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 0.0773% African / African-American · 58/74,994 alleles

Filtering AF 0.0613% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0556%

Overall 0.00384% 62/1,613,924 alleles · ultra-rare exomes 29/1,461,708 · genomes 33/152,216 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0773%	1,293
Admixed American	0.00333%	30,008
Remaining individualsnot grpmax-eligible	0.0016%	62,486
European (non-Finnish)	8.48e-05%	1,179,864

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: NACA
Protein: p.Val196Ala
Coding: c.587T>C
MANE Select: NM_001365896
Type: single nucleotide variant
Location: chr12:56720943 (GRCh38)
Gene constraint: LOEUF 0.627 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 38.15 · 26 PDB
Residue 196: the uba domain; an α-helix

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

Similar variants

NACA p.Ala242= Benign ★★ same type
NACA p.Phe405Ser Benign ★★ same type
NACA p.Pro1772Ser Benign ★★ same type
NACA p.Pro490Arg Benign ★★ same type
NACA p.Ala152Val Uncertain significance ★ ⚠ same type
NACA p.Ala1803Pro Uncertain significance ★ ⚠ same type
NACA p.Ala1833Val Uncertain significance ★ ⚠ same type
NACA p.Ala1868Val Uncertain significance ★ ⚠ 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/naca-p-val196ala (accessed [today's date]).

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