Is BUB3 p.Thr321= (c.963A>G) pathogenic?

BUB3 p.Thr321= (c.963A>G) is classified Likely benign in BUB3 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-11-10). Very rare (popmax 0.00221%, sas).

How common is BUB3 p.Thr321= (c.963A>G) in the general population?

BUB3 p.Thr321= (c.963A>G) is very rare (popmax 0.00221%, sas) (gnomAD).

BUB3 p.Thr321=

c.963A>G · rs1293442005 · VCV2496882

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00221%, sas)

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 5.4	GERP 2.6, phastCons 1
Overall
CADD	9.347	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00221% South Asian · 2/90,674 alleles

Filtering AF 0.000366% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000137%

Overall 0.00031% 5/1,612,140 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00221%	45,337
European (non-Finnish)	0.000254%	393,054

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: BUB3
Protein: p.Thr321=
Coding: c.963A>G
MANE Select: NM_004725
dbSNP: rs1293442005
Type: single nucleotide variant
Location: chr10:123162820 (GRCh38)
Gene constraint: LOEUF 0.77 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 96.10

Full BUB3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BUB3 p.Arg314= Likely benign ★★ same type
BUB3 p.Ser197= Likely benign ★★ same type
BUB3 p.Ser198= Likely benign ★★ same type
BUB3 p.Ala131Val Uncertain significance ★ ⚠ same type
BUB3 p.Ala155Val Uncertain significance ★ ⚠ same type
BUB3 p.Ala187Gly Uncertain significance ★ ⚠ same type
BUB3 p.Ala239Gly Uncertain significance ★ ⚠ same type
BUB3 p.Ala292Val 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/bub3-p-thr321 (accessed [today's date]).

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