Is BUB1B p.Phe68Leu (c.202T>C) pathogenic?

BUB1B p.Phe68Leu (c.202T>C) is classified Uncertain significance in BUB1B (ClinVar, Single submitter, 1 submitter; last evaluated 2024-09-08). AlphaMissense: likely pathogenic (0.9057); Very rare (popmax 8.48e-05%, nfe); Associated with Inborn genetic diseases.

What condition is associated with BUB1B p.Phe68Leu (c.202T>C)?

BUB1B p.Phe68Leu (c.202T>C) is associated with Inborn genetic diseases (ClinVar).

How common is BUB1B p.Phe68Leu (c.202T>C) in the general population?

BUB1B p.Phe68Leu (c.202T>C) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

What do computational predictors say about BUB1B p.Phe68Leu (c.202T>C)?

AlphaMissense predicts likely pathogenic (score 0.9057) — an in-silico prediction, not a clinical call.

BUB1B p.Phe68Leu

c.202T>C · VCV3483142

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9057 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.9057	likely pathogenic · top 4% in BUB1B
REVEL	0.223	benign-leaning
SaProt	LLR -7.72	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 7.8	GERP 2.1, phastCons 1
Regional constraint	o/e 0.91	unconstrained · MANE · 60 kb · p 0.0024 · regional, not allelic
Overall
CADD	24.1	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

Grpmax group 8.48e-05% European (non-Finnish) · 1/1,179,822 alleles

Overall 6.2e-05% 1/1,613,948 alleles · very rare exomes 1/1,461,614 · genomes 0/152,334 · joint denominator

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: BUB1B
Protein: p.Phe68Leu
Coding: c.202T>C
MANE Select: NM_001211
Type: single nucleotide variant
Location: chr15:40170084 (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 68: the bub1 n-terminal domain

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.Phe68= Likely benign ★ same residue
BUB1B p.Phe68Cys Uncertain significance ★ ⚠ 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
BUB1B p.Ala173Thr 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-phe68leu (accessed [today's date]).

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