Is BUB1 p.His222= (c.666C>T) pathogenic?

BUB1 p.His222= (c.666C>T) is classified Likely benign in BUB1 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-12). Very rare (popmax 0.00223%, eas).

How common is BUB1 p.His222= (c.666C>T) in the general population?

BUB1 p.His222= (c.666C>T) is very rare (popmax 0.00223%, eas) (gnomAD).

BUB1 p.His222=

c.666C>T · rs1198597795 · VCV1754780

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

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 -0.6
Overall
CADD	2.549	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00223% East Asian · 1/44,862 alleles

Overall 0.000137% 2/1,461,560 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00223%	44,862
European (non-Finnish)	8.48e-05%	1,179,912

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: BUB1
Protein: p.His222=
Coding: c.666C>T
MANE Select: NM_004336
dbSNP: rs1198597795
Type: single nucleotide variant
Location: chr2:110667660 (GRCh38)
Gene constraint: LOEUF 0.727 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 63.91 · 11 PDB

Full BUB1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BUB1 p.His222Pro Uncertain significance ★★ ⚠ same residue
BUB1 p.His222Gln Uncertain significance ★ ⚠ same residue
BUB1 p.His222Tyr Uncertain significance ★ ⚠ same residue
BUB1 c.1698+1G>T Uncertain significance ★★ same type
BUB1 p.Ala281Thr Uncertain significance ★★ ⚠ same type
BUB1 p.Ala283Thr Uncertain significance ★★ ⚠ same type
BUB1 p.Ala499Val Uncertain significance ★★ ⚠ same type
BUB1 p.Ala502Ser Uncertain significance ★★ ⚠ same type

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/bub1-p-his222 (accessed [today's date]).

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