Is ITGB2 p.Ala74= (c.222G>A) pathogenic?

ITGB2 p.Ala74= (c.222G>A) is classified Likely benign in ITGB2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-12-06). Rare (popmax 0.277%, afr); Associated with leukocyte adhesion deficiency 1.

What condition is associated with ITGB2 p.Ala74= (c.222G>A)?

ITGB2 p.Ala74= (c.222G>A) is associated with leukocyte adhesion deficiency 1 (ClinVar).

How common is ITGB2 p.Ala74= (c.222G>A) in the general population?

ITGB2 p.Ala74= (c.222G>A) is rare (popmax 0.277%, afr) (gnomAD).

How is Leukocyte adhesion deficiency inherited?

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

ITGB2 p.Ala74=

c.222G>A · rs112931116 · VCV783882

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

rare (popmax 0.277%, afr)

Conditions

leukocyte adhesion deficiency 1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP -12	GERP -4.5
Overall
CADD	0.212	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.277% African / African-American · 208/75,022 alleles

Filtering AF 0.246% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.234%

Overall 0.0195% 314/1,614,068 alleles · rare exomes 214/1,461,788 · genomes 100/152,280 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.277%	361
Remaining individualsnot grpmax-eligible	0.0736%	1,359
Middle Eastern	0.0165%	6,056
Admixed American	0.0133%	7,504
South Asian	0.00769%	13,011
East Asian	0.00669%	14,958
European (non-Finnish)	0.00347%	28,780

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: ITGB2
Protein: p.Ala74=
Coding: c.222G>A
MANE Select: NM_000211
dbSNP: rs112931116
Type: single nucleotide variant
Location: chr21:44907021 (GRCh38)
Gene constraint: LOEUF 0.81 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 86.02 · 29 PDB
Residue 74: the psi domain

Full ITGB2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

leukocyte adhesion deficiency 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Leukocyte adhesion deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy

Similar variants

ITGB2 p.Ala74Val Uncertain significance ★★ ⚠ same residue
ITGB2 c.741+1G>A Pathogenic/Likely pathogenic ★★ same condition
ITGB2 c.897+1G>A Pathogenic/Likely pathogenic ★★ same condition
ITGB2 p.Ala239Thr Pathogenic/Likely pathogenic ★★ same condition
ITGB2 p.Ala270Val Likely pathogenic ★★ same condition
ITGB2 p.Arg108Ter Pathogenic/Likely pathogenic ★★ same condition
ITGB2 p.Arg188Ter Pathogenic ★★ same condition
ITGB2 p.Arg593Cys Pathogenic ★★ 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/itgb2-p-ala74 (accessed [today's date]).

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