Is DBH p.His333Arg (c.998A>G) pathogenic?

DBH p.His333Arg (c.998A>G) is classified Uncertain significance in DBH (ClinVar, Single submitter, 1 submitter; last evaluated 2025-04-18). AlphaMissense: likely pathogenic (0.9875); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with DBH p.His333Arg (c.998A>G)?

DBH p.His333Arg (c.998A>G) is associated with Inborn genetic diseases (ClinVar).

How common is DBH p.His333Arg (c.998A>G) in the general population?

DBH p.His333Arg (c.998A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about DBH p.His333Arg (c.998A>G)?

AlphaMissense predicts likely pathogenic (score 0.9875) — an in-silico prediction, not a clinical call.

DBH p.His333Arg

c.998A>G · VCV4009479

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9875 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.9875	likely pathogenic · top 3% in DBH
REVEL	0.956	strongly pathogenic-leaning
SaProt	LLR -15.86	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 11	GERP 1.3, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 22 kb · p 0.96 · regional, not allelic
Overall
CADD	26.3	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.His333Arg
Coding: c.998A>G
MANE Select: NM_000787
Type: single nucleotide variant
Location: chr9:133644294 (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 333: a binding site; a disulfide bond; a β-strand

Full DBH 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

DBH p.Ala113Ser Uncertain significance ★★ ⚠ same condition
DBH p.Ala383Val Uncertain significance ★★ ⚠ same condition
DBH p.Arg43His Uncertain significance ★★ ⚠ same condition
DBH p.Arg473Gln Uncertain significance ★★ ⚠ same condition
DBH p.Arg549Leu Uncertain significance ★★ ⚠ same condition
DBH p.Arg572His Uncertain significance ★★ ⚠ same condition
DBH p.Arg6His Uncertain significance ★★ ⚠ same condition
DBH p.Arg92Cys 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-his333arg (accessed [today's date]).

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