Is BLNK p.Asp59= (c.177C>T) pathogenic?

BLNK p.Asp59= (c.177C>T) is classified Likely benign in BLNK (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-22). Rare (popmax 0.172%, afr); Associated with agammaglobulinemia 4, autosomal recessive.

What condition is associated with BLNK p.Asp59= (c.177C>T)?

BLNK p.Asp59= (c.177C>T) is associated with agammaglobulinemia 4, autosomal recessive (ClinVar).

How common is BLNK p.Asp59= (c.177C>T) in the general population?

BLNK p.Asp59= (c.177C>T) is rare (popmax 0.172%, afr) (gnomAD).

BLNK p.Asp59=

c.177C>T · rs140266229 · VCV735625

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

rare (popmax 0.172%, afr)

Conditions

agammaglobulinemia 4, 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 -7.7	GERP -3.8
Overall
CADD	0.116	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.172% African / African-American · 129/74,976 alleles

Filtering AF 0.148% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.139%

Overall 0.0113% 182/1,611,422 alleles · rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.172%	581
Admixed American	0.0352%	2,844
Remaining individualsnot grpmax-eligible	0.0256%	3,903
Middle Eastern	0.0165%	6,058
South Asian	0.00555%	18,027
East Asian	0.00446%	22,421
European (non-Finnish)	0.000679%	147,377

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: BLNK
Protein: p.Asp59=
Coding: c.177C>T
MANE Select: NM_013314
dbSNP: rs140266229
Type: single nucleotide variant
Location: chr10:96230821 (GRCh38)
Gene constraint: LOEUF 0.517 · pLI 0.90 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 64.46 · 1 PDB
Residue 59: the 'disordered' region

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

Disease context

agammaglobulinemia 4, autosomal recessive — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

BLNK c.902+2T>C Likely pathogenic ★★ same condition
BLNK p.Ala176Val Uncertain significance ★★ ⚠ same condition
BLNK p.Ala218Thr Uncertain significance ★★ ⚠ same condition
BLNK p.Ala290Val Uncertain significance ★★ ⚠ same condition
BLNK p.Ala88Ser Uncertain significance ★★ ⚠ same condition
BLNK p.Ala92Asp Uncertain significance ★★ ⚠ same condition
BLNK p.Ala92Thr Uncertain significance ★★ ⚠ same condition
BLNK p.Arg282Gln 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/blnk-p-asp59 (accessed [today's date]).

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