R4YWR3 · R4YWR3_9ACTN
- ProteinAdenylosuccinate synthetase
- GenepurA
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids427 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
Plays an important role in the de novo pathway of purine nucleotide biosynthesis. Catalyzes the first committed step in the biosynthesis of AMP from IMP.
Catalytic activity
- IMP + L-aspartate + GTP = N6-(1,2-dicarboxyethyl)-AMP + GDP + phosphate + 2 H+
Cofactor
Note: Binds 1 Mg2+ ion per subunit.
Pathway
Purine metabolism; AMP biosynthesis via de novo pathway; AMP from IMP: step 1/2.
Features
Showing features for binding site, active site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 12-18 | GTP (UniProtKB | ChEBI) | |||
Active site | 13 | Proton acceptor | |||
Binding site | 13 | Mg2+ (UniProtKB | ChEBI) | |||
Binding site | 13-16 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners; in other chain | |||
Binding site | 38-41 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners; in other chain | |||
Binding site | 40 | Mg2+ (UniProtKB | ChEBI) | |||
Binding site | 40-42 | GTP (UniProtKB | ChEBI) | |||
Active site | 41 | Proton donor | |||
Binding site | 128 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners; in other chain | |||
Active site | 139 | ||||
Binding site | 142 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners | |||
Binding site | 224 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners; in other chain | |||
Binding site | 239 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners; in other chain | |||
Binding site | 299-305 | substrate | |||
Binding site | 303 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners; in other chain | |||
Binding site | 305 | GTP (UniProtKB | ChEBI) | |||
Binding site | 331-333 | GTP (UniProtKB | ChEBI) | |||
Binding site | 413-415 | GTP (UniProtKB | ChEBI) | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytoplasm | |
Molecular Function | adenylosuccinate synthase activity | |
Molecular Function | GTP binding | |
Molecular Function | magnesium ion binding | |
Biological Process | 'de novo' AMP biosynthetic process | |
Biological Process | IMP metabolic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameAdenylosuccinate synthetase
- EC number
- Short namesAMPSase ; AdSS
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageBacteria > Actinomycetota > Acidimicrobiia > Acidimicrobiales > Microthrixaceae > Candidatus Microthrix
Accessions
- Primary accessionR4YWR3
Proteomes
Subcellular Location
Interaction
Structure
Sequence
- Sequence statusComplete
- Length427
- Mass (Da)46,812
- Last updated2013-07-24 v1
- MD5 Checksum920DC4DC752324F03EBA8E493BC87A85
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
CANL01000005 EMBL· GenBank· DDBJ | CCM62445.1 EMBL· GenBank· DDBJ | Genomic DNA |