GLO1 Protein is a protein. This page describes its structure, normal nervous system function, role in neurodegenerative disease, and potential as a therapeutic target.
GLO1 Protein is a protein. This page describes its structure, normal nervous system function, role in neurodegenerative disease, and potential as a therapeutic target.
Structure
Glyoxalase 1 (GLO1) is a homodimeric metalloenzyme, with each subunit containing a binding site for the catalytic cofactor glutathione (GSH). The active enzyme is a homodimer of approximately 42 kDa. Each subunit consists of 184 amino acids and adopts a beta-alpha-beta fold characteristic of the glyoxalase family. The active site contains two zinc ions (Zn2+) that are essential for catalytic activity. The enzyme requires reduced glutathione (GSH) as a cofactor and catalyzes the conversion of methylglyoxal (MGO) and other reactive carbonyl compounds (RCCs) to S-lactoylglutathione.
Normal Function in the Nervous System
GLO1 plays a crucial role in cellular defense against carbonyl stress:
Methylglyoxal detoxification: Primary enzyme for MGO detoxification
Advanced glycation end product (AGE) prevention: Reduces formation of AGEs
Redox homeostasis: Works with GSH to maintain cellular thiol balance
DNA protection: Prevents DNA damage from reactive carbonyls
Protein quality control: Protects proteins from carbonylation
Energy metabolism: Influences glycolysis through MGO regulation
In [neurons](/entities/neurons), GLO1 activity is particularly important given the high metabolic rate and glucose utilization of the brain.
Role in Neurodegeneration
Alzheimer's Disease
GLO1 is significantly downregulated in AD brain, contributing to pathogenesis:
Elevated methylglyoxal levels in AD patients
Increased protein carbonylation and AGEs in AD brain
MGO promotes [amyloid-beta](/proteins/amyloid-beta) aggregation and toxicity