Q8ZAB3 · ILVD_YERPE
- ProteinDihydroxy-acid dehydratase
- GeneilvD
- StatusUniProtKB reviewed (Swiss-Prot)
- Organism
- Amino acids616 (go to sequence)
- Protein existenceInferred from homology
- Annotation score4/5
Function
function
Functions in the biosynthesis of branched-chain amino acids. Catalyzes the dehydration of (2R,3R)-2,3-dihydroxy-3-methylpentanoate (2,3-dihydroxy-3-methylvalerate) into 2-oxo-3-methylpentanoate (2-oxo-3-methylvalerate) and of (2R)-2,3-dihydroxy-3-methylbutanoate (2,3-dihydroxyisovalerate) into 2-oxo-3-methylbutanoate (2-oxoisovalerate), the penultimate precursor to L-isoleucine and L-valine, respectively.
Catalytic activity
- (2R)-2,3-dihydroxy-3-methylbutanoate = 3-methyl-2-oxobutanoate + H2OThis reaction proceeds in the forward direction.
Cofactor
Protein has several cofactor binding sites:
Note: Binds 1 [2Fe-2S] cluster per subunit. This cluster acts as a Lewis acid cofactor.
Pathway
Amino-acid biosynthesis; L-isoleucine biosynthesis; L-isoleucine from 2-oxobutanoate: step 3/4.
Amino-acid biosynthesis; L-valine biosynthesis; L-valine from pyruvate: step 3/4.
Features
Showing features for binding site, active site.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Binding site | 81 | Mg2+ (UniProtKB | ChEBI) | ||||
Sequence: D | ||||||
Binding site | 122 | [2Fe-2S] cluster (UniProtKB | ChEBI) | ||||
Sequence: C | ||||||
Binding site | 123 | Mg2+ (UniProtKB | ChEBI) | ||||
Sequence: D | ||||||
Binding site | 124 | Mg2+ (UniProtKB | ChEBI); via carbamate group | ||||
Sequence: K | ||||||
Binding site | 195 | [2Fe-2S] cluster (UniProtKB | ChEBI) | ||||
Sequence: C | ||||||
Binding site | 491 | Mg2+ (UniProtKB | ChEBI) | ||||
Sequence: E | ||||||
Active site | 517 | Proton acceptor | ||||
Sequence: S |
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytosol | |
Molecular Function | 2 iron, 2 sulfur cluster binding | |
Molecular Function | dihydroxy-acid dehydratase activity | |
Molecular Function | hydro-lyase activity | |
Molecular Function | magnesium ion binding | |
Biological Process | isoleucine biosynthetic process | |
Biological Process | valine biosynthetic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameDihydroxy-acid dehydratase
- EC number
- Short namesDAD
Gene names
Organism names
- Organism
- Strains
- Taxonomic lineageBacteria > Pseudomonadota > Gammaproteobacteria > Enterobacterales > Yersiniaceae > Yersinia
Accessions
- Primary accessionQ8ZAB3
- Secondary accessions
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
PTM/Processing
Features
Showing features for chain, modified residue.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Chain | PRO_0000103535 | 1-616 | Dihydroxy-acid dehydratase | |||
Sequence: MPKYRSHTTTHGRNMAGARALWRATGMTDDDFGKPIIAVVNSFTQFVPGHVHLRDLGKLVAEQIVASGGVAKEFNTIAVDDGIAMGHGGMLYSLPSRELIADSVEYMVNAHCADAMVCISNCDKITPGMLMASLRLNIPVIFVSGGPMEAGKTKLSDKIIKLDLIDAMIQGANPNVSDEESAQIERSACPTCGSCSGMFTANSMNCLNEALGLALPGNGSLLATHADRKQLFLDAGKHIVALTKRYYEQDDVSALPRNIANKAAFENAMILDIAMGGSTNTVLHLLAAAQEGEIDFSMTDIDHLSRKVPHLCKVAPSTQKYHMEDVHRAGGVIGILGELDRAGLLNRDVSNVLGLNLTQTLEAYDVMLTQDEGVKQMYAAGPAGIRTTKAFSQDCRYPSLDTDREEGCIRTREHAYSQDGGLAVLYGNIAADGCIVKTAGVDKDSLTFRGPAKVFESQDEAVEAILGGKVVAGDVVVIRYEGPKGGPGMQEMLYPTTYLKSMGLGKSCALLTDGRFSGGTSGLSIGHVSPEAASGGLIGLVQDGDFINIDIPNRGIVLDVSEAELAARRETEEAHGDAAWSPKGRERQVSYALRAYAMLATSADKGAVRDKSKLGG | ||||||
Modified residue | 124 | N6-carboxylysine | ||||
Sequence: K |
Proteomic databases
Structure
Sequence
- Sequence statusComplete
- Length616
- Mass (Da)65,499
- Last updated2002-03-01 v1
- Checksum07C577F6A71DE77F
Sequence caution
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AL590842 EMBL· GenBank· DDBJ | CAL22483.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AE009952 EMBL· GenBank· DDBJ | AAM83929.1 EMBL· GenBank· DDBJ | Genomic DNA | Different initiation | |
AE017042 EMBL· GenBank· DDBJ | AAS63320.1 EMBL· GenBank· DDBJ | Genomic DNA | Different initiation |