A0AAE3RL89 · A0AAE3RL89_9ENTR
- ProteinL-threonine dehydratase
- GeneilvA
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids514 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
Catalyzes the anaerobic formation of alpha-ketobutyrate and ammonia from threonine in a two-step reaction. The first step involved a dehydration of threonine and a production of enamine intermediates (aminocrotonate), which tautomerizes to its imine form (iminobutyrate). Both intermediates are unstable and short-lived. The second step is the nonenzymatic hydrolysis of the enamine/imine intermediates to form 2-ketobutyrate and free ammonia. In the low water environment of the cell, the second step is accelerated by RidA.
Catalytic activity
- L-threonine = 2-oxobutanoate + NH4+
Cofactor
Pathway
Amino-acid biosynthesis; L-isoleucine biosynthesis; 2-oxobutanoate from L-threonine: step 1/1.
GO annotations
Aspect | Term | |
---|---|---|
Molecular Function | L-serine ammonia-lyase activity | |
Molecular Function | pyridoxal phosphate binding | |
Molecular Function | threonine deaminase activity | |
Biological Process | isoleucine biosynthetic process | |
Biological Process | L-serine catabolic process | |
Biological Process | threonine catabolic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameL-threonine dehydratase
- EC number
- Alternative names
Gene names
Organism names
- Organism
- Strain
- Taxonomic lineageBacteria > Pseudomonadota > Gammaproteobacteria > Enterobacterales > Enterobacteriaceae > Klebsiella/Raoultella group > Klebsiella
Accessions
- Primary accessionA0AAE3RL89
Proteomes
Interaction
Subunit
Homotetramer.
Structure
Sequence
- Sequence statusComplete
- Length514
- Mass (Da)56,219
- Last updated2024-05-29 v1
- MD5 Checksum2F034797016D5FA1F8F1A701188CC177
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
JAKUZO010000016 EMBL· GenBank· DDBJ | MDK1967013.1 EMBL· GenBank· DDBJ | Genomic DNA |