Is EHMT1 p.Pro31Arg (c.92C>G) pathogenic?

EHMT1 p.Pro31Arg (c.92C>G) is classified Likely benign in EHMT1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-03-19). AlphaMissense: likely benign (0.092); Ultra-rare (popmax 0.0225%, eas); Associated with Kleefstra syndrome 1.

What condition is associated with EHMT1 p.Pro31Arg (c.92C>G)?

EHMT1 p.Pro31Arg (c.92C>G) is associated with Kleefstra syndrome 1 (ClinVar).

How common is EHMT1 p.Pro31Arg (c.92C>G) in the general population?

EHMT1 p.Pro31Arg (c.92C>G) is ultra-rare (popmax 0.0225%, eas) (gnomAD).

What do computational predictors say about EHMT1 p.Pro31Arg (c.92C>G)?

AlphaMissense predicts likely benign (score 0.092) — an in-silico prediction, not a clinical call.

EHMT1 p.Pro31Arg

c.92C>G · VCV3610349

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.092 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0225%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Kleefstra syndrome 1

Computational evidence

Protein change
AlphaMissense	0.092	likely benign
REVEL	0.078	moderately benign-leaning
SaProt	LLR -6.26	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 3.2	GERP 0.66, phastCons 0.078
Regional constraint	o/e 1.20	unconstrained · MANE · 144 kb · p 1.3e-07 · regional, not allelic
Overall
CADD	18.3	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0225% East Asian · 10/44,396 alleles

Filtering AF 0.0121% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00925%

Overall 0.000702% 11/1,565,970 alleles · ultra-rare exomes 10/1,413,958 · genomes 1/152,012 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0225%	4,440
Remaining individualsnot grpmax-eligible	0.00166%	60,362

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: EHMT1
Protein: p.Pro31Arg
Coding: c.92C>G
MANE Select: NM_024757
Type: single nucleotide variant
Location: chr9:137716632 (GRCh38)
Gene constraint: LOEUF 0.159 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 64.89 · 22 PDB
Residue 31: the 'disordered' region

Full EHMT1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

Similar variants

EHMT1 p.Pro31Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
EHMT1 p.Pro31Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
EHMT1 p.Pro31Ala Benign ★ same residue
EHMT1 c.1370-1G>C Likely pathogenic ★★ same condition
EHMT1 c.1647+2T>C Pathogenic/Likely pathogenic ★★ same condition
EHMT1 c.2193-1G>C Pathogenic ★★ same condition
EHMT1 c.2276-2A>G Pathogenic ★★ same condition
EHMT1 c.2712+1G>A Pathogenic ★★ 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/ehmt1-p-pro31arg (accessed [today's date]).

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