Tchem GALE UDP-glucose 4-epimerase

Protein Summary

Description

Catalyzes two distinct but analogous reactions: the reversible epimerization of UDP-glucose to UDP-galactose and the reversible epimerization of UDP-N-acetylglucosamine to UDP-N-acetylgalactosamine. The reaction with UDP-Gal plays a critical role in the Leloir pathway of galactose catabolism in which galactose is converted to the glycolytic intermediate glucose 6-phosphate. It contributes to the catabolism of dietary galactose and enables the endogenous biosynthesis of both UDP-Gal and UDP-GalNAc when exogenous sources are limited. Both UDP-sugar interconversions are important in the synthesis of glycoproteins and glycolipids. This gene encodes UDP-galactose-4-epimerase which catalyzes two distinct but analogous reactions: the epimerization of UDP-glucose to UDP-galactose, and the epimerization of UDP-N-acetylglucosamine to UDP-N-acetylgalactosamine. The bifunctional nature of the enzyme has the important metabolic consequence that mutant cells (or individuals) are dependent not only on exogenous galactose, but also on exogenous N-acetylgalactosamine as a necessary precursor for the synthesis of glycoproteins and glycolipids. Mutations in this gene result in epimerase-deficiency galactosemia, also referred to as galactosemia type 3, a disease characterized by liver damage, early-onset cataracts, deafness and cognitive disability, with symptoms ranging from mild ('peripheral' form) to severe ('generalized' form). Multiple alternatively spliced transcripts encoding the same protein have been identified. [provided by RefSeq, Jul 2008]

Uniprot Accession IDs

• Q14376
• A0A024RAH5
• B3KQ39
• Q38G75
• Q86W41
• Q9BVE3
• Q9UJB4

Gene Name

• GALE

Ensembl ID

• ENST00000374497
• ENSP00000363621
• ENSG00000117308
• ENST00000617979
• ENSP00000483375

Symbol

• SDR1E1

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
histone modification site profile	0.84
transcription factor	0.77
protein domain	0.73
transcription factor binding site profile	0.7
interacting protein	0.65

Protein Classes

No PANTHER Classes or DTO Classes found

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 456.46   (req: < 5)

Gene RIFs: 18   (req: <= 3)

Antibodies: 280   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 456.46   (req: >= 5)

Gene RIFs: 18   (req: > 3)

Antibodies: 280   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 5

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligand: 1

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 1