Is NACA p.Ser75Leu (c.224C>T) pathogenic?

NACA p.Ser75Leu (c.224C>T) is classified Uncertain significance in NACA (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-28). AlphaMissense: likely benign (0.2343); Ultra-rare (popmax 0.0989%, afr).

How common is NACA p.Ser75Leu (c.224C>T) in the general population?

NACA p.Ser75Leu (c.224C>T) is ultra-rare (popmax 0.0989%, afr) (gnomAD).

What do computational predictors say about NACA p.Ser75Leu (c.224C>T)?

AlphaMissense predicts likely benign (score 0.2343) — an in-silico prediction, not a clinical call.

NACA p.Ser75Leu

c.224C>T · VCV3402438

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2343 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0989%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2343	likely benign
REVEL	0.157	moderately benign-leaning
SaProt	LLR -7.34	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 6.5	GERP 1.4, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 5,320 bp · p 0.34 · regional, not allelic
Overall
CADD	22.0	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 0.0989% African / African-American · 74/74,814 alleles

Filtering AF 0.0807% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0741%

Overall 0.0067% 108/1,612,400 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0989%	1,011
Admixed American	0.0217%	4,602
South Asian	0.0154%	6,497
Remaining individualsnot grpmax-eligible	0.00801%	12,484
European (non-Finnish)	0.00017%	589,633

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.Ser75Leu
Coding: c.224C>T
MANE Select: NM_001365896
Type: single nucleotide variant
Location: chr12:56721306 (GRCh38)
Gene constraint: LOEUF 0.627 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 38.15 · 26 PDB
Residue 75: the 'disordered' region; the nac-a/b domain; the 'required for dna-binding' region

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-ser75leu (accessed [today's date]).

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