Is DNMT1 p.His302= (c.906C>T) pathogenic?

DNMT1 p.His302= (c.906C>T) is classified Likely benign in DNMT1 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-03-23). Very rare (popmax 0.00167%, amr); Associated with hereditary sensory neuropathy-deafness-dementia syndrome.

What condition is associated with DNMT1 p.His302= (c.906C>T)?

DNMT1 p.His302= (c.906C>T) is associated with hereditary sensory neuropathy-deafness-dementia syndrome (ClinVar).

How common is DNMT1 p.His302= (c.906C>T) in the general population?

DNMT1 p.His302= (c.906C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

DNMT1 p.His302=

Q: How is Hereditary sensory neuropathy-deafness-dementia syndrome inherited?

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

c.906C>T · rs773200618 · VCV1543088

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

hereditary sensory neuropathy-deafness-dementia syndrome

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 0.76	GERP 1.2, phastCons 0.2
Overall
CADD	6.584	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/59,976 alleles

Overall 0.000186% 3/1,613,880 alleles · very rare exomes 2/1,461,728 · genomes 1/152,152 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	59,976
Finnishnot grpmax-eligible	0.00156%	63,950
South Asian	0.0011%	91,086

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: DNMT1
Protein: p.His302=
Coding: c.906C>T
MANE Select: NM_001130823
dbSNP: rs773200618
Type: single nucleotide variant
Location: chr19:10163346 (GRCh38)
Gene constraint: LOEUF 0.15 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 77.88 · 29 PDB
Residue 302: the 'interaction with the prc2/eed-ezh2 complex' region; the 'disordered' region

Full DNMT1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary sensory neuropathy-deafness-dementia syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hereditary sensory neuropathy-deafness-dementia syndrome (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Adult

Similar variants

DNMT1 p.Ala570Val Pathogenic ★★ ⚠ same condition
DNMT1 p.Tyr511Cys Pathogenic/Likely pathogenic ★★ same condition
DNMT1 c.1280+2T>C Uncertain significance ★★ same condition
DNMT1 c.3524-5G>T Uncertain significance ★★ same condition
DNMT1 c.494-4A>G Uncertain significance ★★ same condition
DNMT1 c.*211G>C Uncertain significance ★★ same condition
DNMT1 c.*253G>A Uncertain significance ★★ same condition
DNMT1 p.Ala1053Thr 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/dnmt1-p-his302 (accessed [today's date]).

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