Is BUB3 p.Arg186Gln (c.557G>A) pathogenic?

BUB3 p.Arg186Gln (c.557G>A) is classified Uncertain significance in BUB3 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-02-12). AlphaMissense: likely benign (0.3); Very rare (popmax 0.00017%, nfe).

How common is BUB3 p.Arg186Gln (c.557G>A) in the general population?

BUB3 p.Arg186Gln (c.557G>A) is very rare (popmax 0.00017%, nfe) (gnomAD).

What do computational predictors say about BUB3 p.Arg186Gln (c.557G>A)?

AlphaMissense predicts likely benign (score 0.3) — an in-silico prediction, not a clinical call.

BUB3 p.Arg186Gln

c.557G>A · rs1453580755 · VCV1748412

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.3 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00017%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.3	likely benign
REVEL	0.276	benign-leaning
SaProt	LLR -9.93	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 10	GERP 2.6, phastCons 1
Regional constraint	o/e 0.62	unconstrained · MANE · 6,079 bp · p 8.5e-11 · regional, not allelic
Overall
CADD	27.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00017% European (non-Finnish) · 2/1,176,484 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000207% 3/1,449,880 alleles · very rare

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.00161%	61,966
European (non-Finnish)grpmax	0.00017%	588,242

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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.Arg186Gln
Coding: c.557G>A
MANE Select: NM_004725
dbSNP: rs1453580755
Type: single nucleotide variant
Location: chr10:123160546 (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.Arg186= Likely benign ★ same residue
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

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-arg186gln (accessed [today's date]).

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