Is DBH p.Gln75Pro (c.224A>C) pathogenic?

DBH p.Gln75Pro (c.224A>C) is classified Uncertain significance in DBH (ClinVar, Single submitter, 1 submitter; last evaluated 2022-05-12). AlphaMissense: likely pathogenic (0.6978); Absent from gnomAD v4.1; Associated with orthostatic hypotension 1.

What condition is associated with DBH p.Gln75Pro (c.224A>C)?

DBH p.Gln75Pro (c.224A>C) is associated with orthostatic hypotension 1 (ClinVar).

How common is DBH p.Gln75Pro (c.224A>C) in the general population?

DBH p.Gln75Pro (c.224A>C) is absent from gnomAD v4.1 (gnomAD).

How is Dopamine beta-hydroxylase deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about DBH p.Gln75Pro (c.224A>C)?

AlphaMissense predicts likely pathogenic (score 0.6978) — an in-silico prediction, not a clinical call.

DBH p.Gln75Pro

c.224A>C · rs2538334557 · VCV1938765

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.6978 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

orthostatic hypotension 1

Computational evidence

Protein change
AlphaMissense	0.6978	likely pathogenic
REVEL	0.693	pathogenic-leaning
SaProt	LLR -16.56	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 1.2	GERP -1.5, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 22 kb · p 0.96 · regional, not allelic
Overall
CADD	20.8	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

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: DBH
Protein: p.Gln75Pro
Coding: c.224A>C
MANE Select: NM_000787
dbSNP: rs2538334557
Type: single nucleotide variant
Location: chr9:133636595 (GRCh38)
Gene constraint: LOEUF 0.936 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 90.58 · 1 PDB
Residue 75: a β-strand; the domon domain

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

Disease context

orthostatic hypotension 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Dopamine beta-hydroxylase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Childhood, Infancy, Neonatal

Similar variants

DBH p.Gln75Ter Pathogenic ★ same residue
DBH c.339+2T>C Pathogenic ★★ same condition
DBH c.1024+6C>T Uncertain significance ★★ same condition
DBH c.486+15C>T Uncertain significance ★★ same condition
DBH c.*393C>T Uncertain significance ★★ same condition
DBH p.Ala113Ser Uncertain significance ★★ ⚠ same condition
DBH p.Ala259Val Uncertain significance ★★ ⚠ same condition
DBH p.Ala383Val 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/dbh-p-gln75pro (accessed [today's date]).

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