Is ADRB3 p.Pro343Ala (c.1027C>G) pathogenic?

ADRB3 p.Pro343Ala (c.1027C>G) is classified Uncertain significance in ADRB3 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-12-19). AlphaMissense: likely pathogenic (0.7326); Very rare (popmax 0.00227%, nfe).

How common is ADRB3 p.Pro343Ala (c.1027C>G) in the general population?

ADRB3 p.Pro343Ala (c.1027C>G) is very rare (popmax 0.00227%, nfe) (gnomAD).

What do computational predictors say about ADRB3 p.Pro343Ala (c.1027C>G)?

AlphaMissense predicts likely pathogenic (score 0.7326) — an in-silico prediction, not a clinical call.

ADRB3 p.Pro343Ala

c.1027C>G · rs1456854445 · VCV3091021

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.7326 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00227%, nfe)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.7326	likely pathogenic
REVEL	0.968	strongly pathogenic-leaning
SaProt	LLR -12.16	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.6, phastCons 1
Regional constraint	o/e 1.04	unconstrained · MANE · 2,248 bp · p 0.4 · regional, not allelic
Overall
CADD	29.7	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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 0.00227% European (non-Finnish) · 26/1,147,062 alleles

Filtering AF 0.00158% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00134%

Overall 0.00168% 26/1,551,034 alleles · very rare

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: ADRB3
Protein: p.Pro343Ala
Coding: c.1027C>G
MANE Select: NM_000025
dbSNP: rs1456854445
Type: single nucleotide variant
Location: chr8:37965443 (GRCh38)
Gene constraint: LOEUF 1.952 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.41 · 2 PDB
Residue 343: an α-helix

Full ADRB3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ADRB3 p.Pro343Arg Uncertain significance ★ ⚠ same residue
ADRB3 p.Asn338Ser Uncertain significance ★★ ⚠ same type
ADRB3 p.Lys151Arg Uncertain significance ★★ ⚠ same type
ADRB3 c.1205+14G>T Benign ★★ same type
ADRB3 c.1206-96A>G Benign ★★ same type
ADRB3 c.*250G>C Benign ★★ same type
ADRB3 p.Arg353Cys Benign ★★ ⚠ same type
ADRB3 p.Trp64Arg Benign ★★ 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/adrb3-p-pro343ala (accessed [today's date]).

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