Is BCHE p.Thr271= (c.813G>A) pathogenic?

BCHE p.Thr271= (c.813G>A) is classified Uncertain significance in BCHE (ClinVar, Single submitter, 1 submitter; last evaluated 2018-01-12). Very rare (popmax 0.0011%, sas); Associated with butyrylcholinesterase deficiency.

What condition is associated with BCHE p.Thr271= (c.813G>A)?

BCHE p.Thr271= (c.813G>A) is associated with butyrylcholinesterase deficiency (ClinVar).

How common is BCHE p.Thr271= (c.813G>A) in the general population?

BCHE p.Thr271= (c.813G>A) is very rare (popmax 0.0011%, sas) (gnomAD).

How is Hereditary butyrylcholinesterase deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

BCHE p.Thr271=

c.813G>A · rs1398040946 · VCV901556

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Conditions

butyrylcholinesterase deficiency

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 -7.2	GERP -4.5
Overall
CADD	0.145	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/91,080 alleles

Overall 6.84e-05% 1/1,461,682 alleles · very rare

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: BCHE
Protein: p.Thr271=
Coding: c.813G>A
MANE Select: NM_000055
dbSNP: rs1398040946
Type: single nucleotide variant
Location: chr3:165830221 (GRCh38)
Gene constraint: LOEUF 1.195 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 93.30 · 111 PDB
Residue 271: a UniProt-annotated variant site (in bched; allele fluoride-1); an α-helix

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

Disease context

butyrylcholinesterase deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hereditary butyrylcholinesterase deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

BCHE p.Thr271Met Conflicting classifications of pathogenicity ★ ⚠ same residue
BCHE p.Arg414Cys Pathogenic/Likely pathogenic ★★ ⚠ same condition
BCHE p.Arg452Ter Pathogenic/Likely pathogenic ★★ same condition
BCHE p.Asp98Gly Pathogenic/Likely pathogenic ★★ ⚠ same condition
BCHE p.Glu377Ter Pathogenic/Likely pathogenic ★★ same condition
BCHE p.Gly143Asp Pathogenic ★★ same condition
BCHE p.Gly393Arg Pathogenic ★★ same condition
BCHE p.Leu358Ile 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/bche-p-thr271 (accessed [today's date]).

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