Is DNMT1 p.Pro191Ala (c.571C>G) pathogenic?

DNMT1 p.Pro191Ala (c.571C>G) is classified Uncertain significance in DNMT1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-01-19). AlphaMissense: likely benign (0.0664); Absent from gnomAD v4.1; Associated with hereditary sensory neuropathy-deafness-dementia syndrome.

What condition is associated with DNMT1 p.Pro191Ala (c.571C>G)?

DNMT1 p.Pro191Ala (c.571C>G) is associated with hereditary sensory neuropathy-deafness-dementia syndrome (ClinVar).

How common is DNMT1 p.Pro191Ala (c.571C>G) in the general population?

DNMT1 p.Pro191Ala (c.571C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about DNMT1 p.Pro191Ala (c.571C>G)?

AlphaMissense predicts likely benign (score 0.0664) — an in-silico prediction, not a clinical call.

DNMT1 p.Pro191Ala

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.571C>G · rs2513878966 · VCV2830081

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0664 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary sensory neuropathy-deafness-dementia syndrome

Computational evidence

Protein change
AlphaMissense	0.0664	likely benign
REVEL	0.053	moderately benign-leaning
SaProt	LLR -6.11	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.1	GERP 6.2, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 35 kb · p 0.0067 · regional, not allelic
Overall
CADD	20.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM P175A vs ClinVar P191A) — verify the residue.

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: DNMT1
Protein: p.Pro191Ala
Coding: c.571C>G
MANE Select: NM_001130823
dbSNP: rs2513878966
Type: single nucleotide variant
Location: chr19:10175617 (GRCh38)
Gene constraint: LOEUF 0.15 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 77.88 · 29 PDB
Residue 175 UniProt numbering: the 'interaction with the prc2/eed-ezh2 complex' region; the 'disordered' region; the 'interaction with dnmt3b' 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-pro191ala (accessed [today's date]).

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