Is BUB1B p.Arg381Ser (c.1143G>T) pathogenic?

BUB1B p.Arg381Ser (c.1143G>T) is classified Uncertain significance in BUB1B (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-31). AlphaMissense: likely pathogenic (0.6316); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with BUB1B p.Arg381Ser (c.1143G>T)?

BUB1B p.Arg381Ser (c.1143G>T) is associated with Inborn genetic diseases (ClinVar).

How common is BUB1B p.Arg381Ser (c.1143G>T) in the general population?

BUB1B p.Arg381Ser (c.1143G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BUB1B p.Arg381Ser (c.1143G>T)?

AlphaMissense predicts likely pathogenic (score 0.6316) — an in-silico prediction, not a clinical call.

BUB1B p.Arg381Ser

c.1143G>T · rs2037501052 · VCV3221331

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.6316 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.6316	likely pathogenic
REVEL	0.221	benign-leaning
SaProt	LLR -5.07	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.47	GERP -4.4, phastCons 0.94
Regional constraint	o/e 0.91	unconstrained · MANE · 60 kb · p 0.0024 · regional, not allelic
Overall
CADD	19.32	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: BUB1B
Protein: p.Arg381Ser
Coding: c.1143G>T
MANE Select: NM_001211
dbSNP: rs2037501052
Type: single nucleotide variant
Location: chr15:40196629 (GRCh38)
Gene constraint: LOEUF 0.707 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 64.62 · 9 PDB
Residue 381: the 'disordered' region

Full BUB1B gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

BUB1B p.Arg381Thr Uncertain significance ★★ ⚠ same residue
BUB1B p.Arg381Met Uncertain significance ★ ⚠ same residue
BUB1B p.Arg381= Likely benign ★ same residue
BUB1B c.35+4G>T Uncertain significance ★★ same condition
BUB1B p.Ala1017Thr Uncertain significance ★★ ⚠ same condition
BUB1B p.Ala1046Pro Uncertain significance ★★ ⚠ same condition
BUB1B p.Ala108Thr Uncertain significance ★★ ⚠ same condition
BUB1B p.Ala171Pro 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/bub1b-p-arg381ser (accessed [today's date]).

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