Is DNMT1 p.Tyr889= (c.2667C>T) pathogenic?

DNMT1 p.Tyr889= (c.2667C>T) is classified Conflicting classifications of pathogenicity in DNMT1 (ClinVar, Conflicting submitters, 7 submitters; last evaluated 2026-01-09). Ultra-rare (popmax 0.014%, nfe); Associated with hereditary sensory neuropathy-deafness-dementia syndrome.

What condition is associated with DNMT1 p.Tyr889= (c.2667C>T)?

DNMT1 p.Tyr889= (c.2667C>T) is associated with hereditary sensory neuropathy-deafness-dementia syndrome (ClinVar).

How common is DNMT1 p.Tyr889= (c.2667C>T) in the general population?

DNMT1 p.Tyr889= (c.2667C>T) is ultra-rare (popmax 0.014%, nfe) (gnomAD).

DNMT1 p.Tyr889=

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.2667C>T · rs199832007 · VCV539613

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 7 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.014%, nfe)

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 -13	GERP -4.6
Overall
CADD	0.022	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.014% European (non-Finnish) · 165/1,180,044 alleles

Filtering AF 0.0122% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0116%

Overall 0.0118% 190/1,614,080 alleles · ultra-rare exomes 171/1,461,884 · genomes 19/152,196 · joint denominator

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0192%	5,207
European (non-Finnish)grpmax	0.014%	7,152
Admixed American	0.00667%	15,001
South Asian	0.00549%	18,217
African / African-American	0.004%	24,976
East Asian	0.00223%	44,902

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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.Tyr889=
Coding: c.2667C>T
MANE Select: NM_001130823
dbSNP: rs199832007
Type: single nucleotide variant
Location: chr19:10148937 (GRCh38)
Gene constraint: LOEUF 0.15 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 77.88 · 29 PDB
Residue 889: a turn

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-tyr889 (accessed [today's date]).

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