Is CD79A p.Pro128= (c.384G>A) pathogenic?

CD79A p.Pro128= (c.384G>A) is classified Likely benign in CD79A (ClinVar, Single submitter, 1 submitter; last evaluated 2023-05-16). Ultra-rare (popmax 0.0224%, eas); Associated with agammaglobulinemia 3, autosomal recessive.

What condition is associated with CD79A p.Pro128= (c.384G>A)?

CD79A p.Pro128= (c.384G>A) is associated with agammaglobulinemia 3, autosomal recessive (ClinVar).

How common is CD79A p.Pro128= (c.384G>A) in the general population?

CD79A p.Pro128= (c.384G>A) is ultra-rare (popmax 0.0224%, eas) (gnomAD).

CD79A p.Pro128=

c.384G>A · rs782014534 · VCV1950270

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0224%, eas)

Conditions

agammaglobulinemia 3, autosomal recessive

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 -7	GERP -3
Overall
CADD	0.093	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0224% East Asian · 10/44,668 alleles

Filtering AF 0.0121% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0092%

Overall 0.00144% 23/1,601,238 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0224%	4,467
Admixed American	0.00337%	29,708
South Asian	0.00333%	30,035
African / African-American	0.00134%	74,664
European (non-Finnish)	0.000597%	167,447

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: CD79A
Protein: p.Pro128=
Coding: c.384G>A
MANE Select: NM_001783
dbSNP: rs782014534
Type: single nucleotide variant
Location: chr19:41879539 (GRCh38)
Gene constraint: LOEUF 0.991 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.56 · 6 PDB
Residue 128: an α-helix

Full CD79A gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

agammaglobulinemia 3, autosomal recessive — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

CD79A p.Arg124Cys Uncertain significance ★★ ⚠ same condition
CD79A p.Arg124His Uncertain significance ★★ ⚠ same condition
CD79A p.Arg168Gln Uncertain significance ★★ ⚠ same condition
CD79A p.Arg204Gln Uncertain significance ★★ ⚠ same condition
CD79A p.Asn60Ser Uncertain significance ★★ ⚠ same condition
CD79A p.Asn63Ser Uncertain significance ★★ ⚠ same condition
CD79A p.Gly179Arg Uncertain significance ★★ ⚠ same condition
CD79A p.Ile151Thr 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/cd79a-p-pro128 (accessed [today's date]).

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