Is GNB3 p.Gln13= (c.39G>A) pathogenic?

GNB3 p.Gln13= (c.39G>A) is classified Likely benign in GNB3 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-07-17). Absent from gnomAD v4.1.

How common is GNB3 p.Gln13= (c.39G>A) in the general population?

GNB3 p.Gln13= (c.39G>A) is absent from gnomAD v4.1 (gnomAD).

GNB3 p.Gln13=

c.39G>A · rs2137976501 · VCV1105181

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3	GERP 1, phastCons 1
Overall
CADD	6.711	PHRED · no single calibrated threshold — expert panels disagree

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: GNB3
Protein: p.Gln13=
Coding: c.39G>A
MANE Select: NM_002075
dbSNP: rs2137976501
Type: single nucleotide variant
Location: chr12:6841326 (GRCh38)
Gene constraint: LOEUF 1.072 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 97.19 · 2 PDB

Full GNB3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

GNB3 c.203+6G>A Uncertain significance ★★ same type
GNB3 p.Ala106Ser Uncertain significance ★★ ⚠ same type
GNB3 p.Ala231Thr Uncertain significance ★★ ⚠ same type
GNB3 p.Ala64Thr Uncertain significance ★★ ⚠ same type
GNB3 p.Arg129His Uncertain significance ★★ ⚠ same type
GNB3 p.Arg137Gln Uncertain significance ★★ ⚠ same type
GNB3 p.Arg150Cys Uncertain significance ★★ ⚠ same type
GNB3 p.Arg42Gln 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/gnb3-p-gln13 (accessed [today's date]).

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