Is MDH2 p.Phe155= (c.465C>T) pathogenic?

MDH2 p.Phe155= (c.465C>T) is classified Likely benign in MDH2 (ClinVar, Single submitter, 1 submitter; last evaluated 2019-09-18). Very rare (popmax 0.00167%, amr); Associated with Inborn genetic diseases.

What condition is associated with MDH2 p.Phe155= (c.465C>T)?

MDH2 p.Phe155= (c.465C>T) is associated with Inborn genetic diseases (ClinVar).

How common is MDH2 p.Phe155= (c.465C>T) in the general population?

MDH2 p.Phe155= (c.465C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

MDH2 p.Phe155=

c.465C>T · rs1797912166 · VCV1742228

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

Inborn genetic diseases

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 0.82	phastCons 1
Overall
CADD	10.72	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/60,022 alleles

Overall 6.2e-05% 1/1,614,142 alleles · very rare exomes 1/1,461,868 · genomes 0/152,274 · 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: MDH2
Protein: p.Phe155=
Coding: c.465C>T
MANE Select: NM_005918
dbSNP: rs1797912166
Type: single nucleotide variant
Location: chr7:76060408 (GRCh38)
Gene constraint: LOEUF 0.984 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 93.49 · 7 PDB
Residue 155: an α-helix

Full MDH2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

MDH2 p.Phe155Leu Uncertain significance ★ ⚠ same residue
MDH2 p.Ala135Gly Uncertain significance ★★ ⚠ same condition
MDH2 p.Ala141Thr Uncertain significance ★★ same condition
MDH2 p.Ala177Thr Uncertain significance ★★ ⚠ same condition
MDH2 p.Ala21Val Uncertain significance ★★ ⚠ same condition
MDH2 p.Ala242Val Uncertain significance ★★ ⚠ same condition
MDH2 p.Ala256Thr Uncertain significance ★★ ⚠ same condition
MDH2 p.Ala325Val 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/mdh2-p-phe155 (accessed [today's date]).

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