Is ITGB2 p.Arg108= (c.322C>A) pathogenic?

ITGB2 p.Arg108= (c.322C>A) is classified Likely benign in ITGB2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-10-13). Very rare (popmax 0.00305%, nfe); Associated with leukocyte adhesion deficiency 1.

What condition is associated with ITGB2 p.Arg108= (c.322C>A)?

ITGB2 p.Arg108= (c.322C>A) is associated with leukocyte adhesion deficiency 1 (ClinVar).

How common is ITGB2 p.Arg108= (c.322C>A) in the general population?

ITGB2 p.Arg108= (c.322C>A) is very rare (popmax 0.00305%, nfe) (gnomAD).

How is Leukocyte adhesion deficiency inherited?

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

ITGB2 p.Arg108=

c.322C>A · rs772471533 · VCV1100334

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00305%, nfe)

Conditions

leukocyte adhesion deficiency 1

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 1.1	GERP -3.5, phastCons 0.99
Overall
CADD	6.607	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00305% European (non-Finnish) · 36/1,179,972 alleles

Filtering AF 0.00223% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00198%

Overall 0.00235% 38/1,613,964 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00305%	32,777
Remaining individualsnot grpmax-eligible	0.0016%	62,480
South Asian	0.0011%	91,078

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.Arg108=
Coding: c.322C>A
MANE Select: NM_000211
dbSNP: rs772471533
Type: single nucleotide variant
Location: chr21:44906921 (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 108: a disulfide bond

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.Arg108Ter Pathogenic/Likely pathogenic ★★ same residue
ITGB2 p.Arg108Gln Uncertain significance ★★ ⚠ same residue
ITGB2 p.Arg108Pro 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.Arg188Ter 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-arg108 (accessed [today's date]).

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