Is NIT2 p.Arg23Cys (c.67C>T) pathogenic?

NIT2 p.Arg23Cys (c.67C>T) is classified Uncertain significance in NIT2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-16). AlphaMissense: likely benign (0.2565); Ultra-rare (popmax 0.0801%, afr).

How common is NIT2 p.Arg23Cys (c.67C>T) in the general population?

NIT2 p.Arg23Cys (c.67C>T) is ultra-rare (popmax 0.0801%, afr) (gnomAD).

What do computational predictors say about NIT2 p.Arg23Cys (c.67C>T)?

AlphaMissense predicts likely benign (score 0.2565) — an in-silico prediction, not a clinical call.

NIT2 p.Arg23Cys

c.67C>T · rs373731645 · VCV3200245

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2565 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0801%, afr)

Missense predictors

2/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2565	likely benign
REVEL	0.852	moderately pathogenic-leaning
SaProt	LLR -12.64	damaging
⇒ REVEL and SaProt call this damaging; AlphaMissense does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.2	GERP -0.055, phastCons 0.99
Regional constraint	o/e 0.90	unconstrained · MANE · 20 kb · p 0.07 · regional, not allelic
Overall
CADD	25.0	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0801% African / African-American · 60/74,886 alleles

Filtering AF 0.0638% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.058%

Overall 0.0044% 71/1,613,932 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0801%	1,248
Remaining individualsnot grpmax-eligible	0.0096%	10,414
South Asian	0.0022%	45,536
European (non-Finnish)	0.000254%	393,334

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: NIT2
Protein: p.Arg23Cys
Coding: c.67C>T
MANE Select: NM_020202
dbSNP: rs373731645
Type: single nucleotide variant
Location: chr3:100339146 (GRCh38)
Gene constraint: LOEUF 1.249 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 97.62
Residue 23: the cn hydrolase domain

Full NIT2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

NIT2 p.Ala209Val Uncertain significance ★ ⚠ same type
NIT2 p.Ala51Gly Uncertain significance ★ ⚠ same type
NIT2 p.Ala51Val Uncertain significance ★ ⚠ same type
NIT2 p.Arg157Gln Uncertain significance ★ ⚠ same type
NIT2 p.Arg195Trp Uncertain significance ★ ⚠ same type
NIT2 p.Arg210Trp Uncertain significance ★ same type
NIT2 p.Arg255Cys Uncertain significance ★ ⚠ same type
NIT2 p.Arg29Trp 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/nit2-p-arg23cys (accessed [today's date]).

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