Is BHMT2 p.Pro256Leu (c.767C>T) pathogenic?

BHMT2 p.Pro256Leu (c.767C>T) is classified Uncertain significance in BHMT2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-04). AlphaMissense: likely benign (0.159); Ultra-rare (popmax 0.0471%, sas).

How common is BHMT2 p.Pro256Leu (c.767C>T) in the general population?

BHMT2 p.Pro256Leu (c.767C>T) is ultra-rare (popmax 0.0471%, sas) (gnomAD).

What do computational predictors say about BHMT2 p.Pro256Leu (c.767C>T)?

AlphaMissense predicts likely benign (score 0.159) — an in-silico prediction, not a clinical call.

BHMT2 p.Pro256Leu

c.767C>T · VCV4207581

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.159 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0471%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.159	likely benign
REVEL	0.57	indeterminate
SaProt	LLR -8.99	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.6	GERP 2.6, phastCons 0.99
Regional constraint	o/e 0.90	unconstrained · MANE · 19 kb · p 0.033 · regional, not allelic
Overall
CADD	26.3	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.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0471% South Asian · 42/89,222 alleles

Filtering AF 0.0357% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0318%

Overall 0.00269% 43/1,598,290 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0471%	2,124
European (non-Finnish)	8.54e-05%	1,171,599

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: BHMT2
Protein: p.Pro256Leu
Coding: c.767C>T
MANE Select: NM_017614
Type: single nucleotide variant
Location: chr5:79083360 (GRCh38)
Gene constraint: LOEUF 1.013 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 95.82
Residue 256: the hcy-binding domain

Full BHMT2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

BHMT2 p.Ala66Val Benign ★★ ⚠ same type
BHMT2 p.Ala126Gly Uncertain significance ★ ⚠ same type
BHMT2 p.Ala233Val Uncertain significance ★ ⚠ same type
BHMT2 p.Ala244Val Uncertain significance ★ ⚠ same type
BHMT2 p.Ala279Thr Uncertain significance ★ ⚠ same type
BHMT2 p.Ala98Thr Uncertain significance ★ ⚠ same type
BHMT2 p.Arg16Cys Uncertain significance ★ ⚠ same type
BHMT2 p.Arg16His Uncertain significance ★ ⚠ same type

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/bhmt2-p-pro256leu (accessed [today's date]).

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