Is RB1 p.Glu166Asp (c.498A>T) pathogenic?

RB1 p.Glu166Asp (c.498A>T) is classified Uncertain significance in RB1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-04-24). AlphaMissense: ambiguous (0.4565); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with RB1 p.Glu166Asp (c.498A>T)?

RB1 p.Glu166Asp (c.498A>T) is associated with hereditary neoplastic syndrome (ClinVar).

How common is RB1 p.Glu166Asp (c.498A>T) in the general population?

RB1 p.Glu166Asp (c.498A>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about RB1 p.Glu166Asp (c.498A>T)?

AlphaMissense predicts ambiguous (score 0.4565) — an in-silico prediction, not a clinical call.

RB1 p.Glu166Asp

c.498A>T · VCV3313048

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4565 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.4565	ambiguous
REVEL	0.374	indeterminate
SaProt	LLR -7.55	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.9	GERP 6.2, phastCons 1
Regional constraint	o/e 0.81	unconstrained · MANE · 156 kb · p 9.1e-08 · regional, not allelic
Overall
CADD	26.5	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: RB1
Protein: p.Glu166Asp
Coding: c.498A>T
MANE Select: NM_000321
Type: single nucleotide variant
Location: chr13:48345197 (GRCh38)
Gene constraint: LOEUF 0.239 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.03 · 19 PDB
Residue 166: an α-helix

Full RB1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

RB1 p.Glu166Ter Pathogenic ★★ same residue
RB1 p.Glu166Gln Uncertain significance ★★ ⚠ same residue
RB1 p.Glu166Ala Uncertain significance ★ ⚠ same residue
RB1 p.Glu166Gly Uncertain significance ★ ⚠ same residue
RB1 c.1049+1G>A Pathogenic/Likely pathogenic ★★ same condition
RB1 c.1049+1G>T Pathogenic/Likely pathogenic ★★ same condition
RB1 c.1049+3A>G Pathogenic/Likely pathogenic ★★ same condition
RB1 c.1050-2A>G Pathogenic/Likely pathogenic ★★ 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/rb1-p-glu166asp (accessed [today's date]).

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