Is RAC2 p.Asp121= (c.363C>T) pathogenic?

RAC2 p.Asp121= (c.363C>T) is classified Likely benign in RAC2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2026-01-26). Very rare (popmax 0.01%, amr); Associated with neutrophil immunodeficiency syndrome.

What condition is associated with RAC2 p.Asp121= (c.363C>T)?

RAC2 p.Asp121= (c.363C>T) is associated with neutrophil immunodeficiency syndrome (ClinVar).

How common is RAC2 p.Asp121= (c.363C>T) in the general population?

RAC2 p.Asp121= (c.363C>T) is very rare (popmax 0.01%, amr) (gnomAD).

How is Infantile LAD-like disease due to RAC2 deficiency inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

RAC2 p.Asp121=

c.363C>T · rs771516943 · VCV731337

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.01%, amr)

Conditions

neutrophil immunodeficiency syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -9.2	GERP -3.8
Overall
CADD	0.654	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.01% Admixed American · 6/60,014 alleles

Filtering AF 0.00428% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00295%

Overall 0.00359% 58/1,614,114 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.01%	10,002
South Asian	0.00549%	18,215
East Asian	0.00446%	22,435
European (non-Finnish)	0.00356%	28,096
African / African-American	0.00267%	37,511
Remaining individualsnot grpmax-eligible	0.0016%	62,508

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: RAC2
Protein: p.Asp121=
Coding: c.363C>T
MANE Select: NM_002872
dbSNP: rs771516943
Type: single nucleotide variant
Location: chr22:37231316 (GRCh38)
Gene constraint: LOEUF 0.197 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 93.56 · 4 PDB
Residue 121: a UniProt-annotated variant site (in imd73c; strong decrease in protein expression)

Full RAC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

neutrophil immunodeficiency syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Infantile LAD-like disease due to RAC2 deficiency (Orphanet):

Inheritance: Autosomal dominant
Onset: Infancy, Neonatal

Similar variants

RAC2 p.Asp121Glu Uncertain significance ★ ⚠ same residue
RAC2 p.Glu62Lys Pathogenic/Likely pathogenic ★★ same condition
RAC2 p.Ala95Thr Uncertain significance ★★ ⚠ same condition
RAC2 p.Arg174Trp Uncertain significance ★★ ⚠ same condition
RAC2 p.Arg183Trp Uncertain significance ★★ ⚠ same condition
RAC2 p.Arg66His Uncertain significance ★★ ⚠ same condition
RAC2 p.Arg68Trp Uncertain significance ★★ ⚠ same condition
RAC2 p.Asp63Asn Uncertain significance ★★ ⚠ same condition

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/rac2-p-asp121 (accessed [today's date]).

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