Is EHMT1 p.Arg387= (c.1161C>T) pathogenic?

EHMT1 p.Arg387= (c.1161C>T) is classified Likely benign in EHMT1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-12). Ultra-rare (popmax 0.0164%, mid); Associated with Kleefstra syndrome 1.

What condition is associated with EHMT1 p.Arg387= (c.1161C>T)?

EHMT1 p.Arg387= (c.1161C>T) is associated with Kleefstra syndrome 1 (ClinVar).

How common is EHMT1 p.Arg387= (c.1161C>T) in the general population?

EHMT1 p.Arg387= (c.1161C>T) is ultra-rare (popmax 0.0164%, mid) (gnomAD).

EHMT1 p.Arg387=

c.1161C>T · rs759417830 · VCV1126660

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0164%, mid)

Conditions

Kleefstra syndrome 1

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 -2	GERP -3
Overall
CADD	2.302	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0164% Middle Eastern · 1/6,084 alleles

Filtering AF 0.00164% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00142%

Overall 0.00211% 34/1,613,924 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0164%	6,084
Remaining individualsnot grpmax-eligible	0.0048%	20,827
European (non-Finnish)	0.00237%	42,145
African / African-American	0.00134%	74,904
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: EHMT1
Protein: p.Arg387=
Coding: c.1161C>T
MANE Select: NM_024757
dbSNP: rs759417830
Type: single nucleotide variant
Location: chr9:137744081 (GRCh38)
Gene constraint: LOEUF 0.159 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 64.89 · 22 PDB
Residue 387: 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.Arg387Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
EHMT1 p.Arg387His Conflicting classifications of pathogenicity ★ ⚠ 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
EHMT1 c.2867+2T>C Pathogenic/Likely 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-arg387 (accessed [today's date]).

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