Is CYBA p.Thr191= (c.573C>T) pathogenic?

CYBA p.Thr191= (c.573C>T) is classified Likely benign in CYBA (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-11). Ultra-rare (popmax 0.0182%, mid); Associated with granulomatous disease, chronic, autosomal recessive, cytochrome b-negative.

What condition is associated with CYBA p.Thr191= (c.573C>T)?

CYBA p.Thr191= (c.573C>T) is associated with granulomatous disease, chronic, autosomal recessive, cytochrome b-negative (ClinVar).

How common is CYBA p.Thr191= (c.573C>T) in the general population?

CYBA p.Thr191= (c.573C>T) is ultra-rare (popmax 0.0182%, mid) (gnomAD).

How is Chronic granulomatous disease inherited?

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

CYBA p.Thr191=

c.573C>T · rs1159034472 · VCV1552989

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0182%, mid)

Conditions

granulomatous disease, chronic, autosomal recessive, cytochrome b-negative

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 -4.3	GERP -3.2
Overall
CADD	2.155	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0182% Middle Eastern · 1/5,500 alleles

Filtering AF 0.00114% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000931%

Overall 0.00144% 22/1,528,484 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0182%	5,500
European (non-Finnish)	0.00175%	57,008
African / African-American	0.00142%	70,374

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: CYBA
Protein: p.Thr191=
Coding: c.573C>T
MANE Select: NM_000101
dbSNP: rs1159034472
Type: single nucleotide variant
Location: chr16:88643368 (GRCh38)
Gene constraint: LOEUF 1.726 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.28 · 7 PDB
Residue 191: the 'disordered' region

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

Disease context

granulomatous disease, chronic, autosomal recessive, cytochrome b-negative — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Chronic granulomatous disease (Orphanet):

Inheritance: Autosomal recessive, X-linked recessive
Onset: Adolescent, Adult, Childhood, Infancy
Prevalence: 1-9 / 1 000 000 (Worldwide)

Similar variants

CYBA c.128+2T>C Likely pathogenic ★★ same condition
CYBA c.204-2A>G Pathogenic/Likely pathogenic ★★ same condition
CYBA c.287+1G>T Pathogenic/Likely pathogenic ★★ same condition
CYBA c.287+2T>C Pathogenic/Likely pathogenic ★★ same condition
CYBA c.288-1G>T Pathogenic/Likely pathogenic ★★ same condition
CYBA c.369+1G>A Likely pathogenic ★★ same condition
CYBA c.58+2T>C Pathogenic/Likely pathogenic ★★ same condition
CYBA p.Ala124Val Pathogenic/Likely 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/cyba-p-thr191 (accessed [today's date]).

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