Is LDHA p.Ile77= (c.231T>C) pathogenic?

LDHA p.Ile77= (c.231T>C) is classified Likely benign in LDHA (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-25). Very rare (popmax 0.00667%, amr); Associated with glycogen storage disease due to lactate dehydrogenase M-subunit deficiency.

How common is LDHA p.Ile77= (c.231T>C) in the general population?

LDHA p.Ile77= (c.231T>C) is very rare (popmax 0.00667%, amr) (gnomAD).

LDHA p.Ile77=

Q: What condition is associated with LDHA p.Ile77= (c.231T>C)?

LDHA p.Ile77= (c.231T>C) is associated with glycogen storage disease due to lactate dehydrogenase M-subunit deficiency (ClinVar).

c.231T>C · rs777160159 · VCV2103768

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00667%, amr)

Conditions

glycogen storage disease due to lactate dehydrogenase M-subunit 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 -0.62	GERP -3.8, phastCons 0.08
Overall
CADD	6.238	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00667% Admixed American · 4/60,000 alleles

Filtering AF 0.00226% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00135%

Overall 0.00025% 4/1,599,244 alleles · very rare exomes 4/1,446,942 · genomes 0/152,302 · joint denominator

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: LDHA
Protein: p.Ile77=
Coding: c.231T>C
MANE Select: NM_005566
dbSNP: rs777160159
Type: single nucleotide variant
Location: chr11:18399535 (GRCh38)
Gene constraint: LOEUF 0.613 · pLI 0.77 (gnomAD)
Structure: AlphaFold pLDDT 96.08 · 46 PDB
Residue 77: a β-strand

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

Disease context

glycogen storage disease due to lactate dehydrogenase M-subunit deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

LDHA p.Ser137Ter Pathogenic ★★ same condition
LDHA c.*660C>T Uncertain significance ★★ same condition
LDHA p.Arg112Cys Uncertain significance ★★ ⚠ same condition
LDHA p.Arg157His Uncertain significance ★★ ⚠ same condition
LDHA p.Asp285Val Uncertain significance ★★ ⚠ same condition
LDHA p.Asp46Val Uncertain significance ★★ ⚠ same condition
LDHA p.Ile159Asn Uncertain significance ★★ ⚠ same condition
LDHA p.Lys149Glu 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/ldha-p-ile77 (accessed [today's date]).

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