D5A8A1 · D5A8A1_PICSI
- ProteinAdenylosuccinate synthetase, chloroplastic
- GenePURA
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids309 (go to sequence)
- Protein existenceEvidence at transcript level
- Annotation score3/5
Function
function
Plays an important role in the de novo pathway and in the salvage pathway of purine nucleotide biosynthesis. Catalyzes the first commited step in the biosynthesis of AMP from IMP.
Catalytic activity
- GTP + IMP + L-aspartate = GDP + 2 H+ + N6-(1,2-dicarboxyethyl)-AMP + phosphate
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 | 14 | IMP (UniProtKB | ChEBI) | ||||
Sequence: T | ||||||
Active site | 25 | |||||
Sequence: K | ||||||
Binding site | 28 | IMP (UniProtKB | ChEBI); ligand shared between dimeric partners | ||||
Sequence: R | ||||||
Binding site | 108 | IMP (UniProtKB | ChEBI) | ||||
Sequence: Q | ||||||
Binding site | 123 | IMP (UniProtKB | ChEBI) | ||||
Sequence: T | ||||||
Binding site | 183-189 | substrate | ||||
Sequence: TTTGRPR | ||||||
Binding site | 187 | IMP (UniProtKB | ChEBI) | ||||
Sequence: R | ||||||
Binding site | 189 | GTP (UniProtKB | ChEBI) | ||||
Sequence: R | ||||||
Binding site | 215-217 | GTP (UniProtKB | ChEBI) | ||||
Sequence: KLD | ||||||
Binding site | 298-300 | GTP (UniProtKB | ChEBI) | ||||
Sequence: GVG |
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | chloroplast | |
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, chloroplastic
- EC number
- Short namesAMPSase ; AdSS
- Alternative names
Gene names
Organism names
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Pinopsida > Pinidae > Conifers I > Pinales > Pinaceae > Picea
Accessions
- Primary accessionD5A8A1
Subcellular Location
Interaction
Subunit
Homodimer.
Structure
Sequence
- Sequence statusComplete
- Length309
- Mass (Da)33,826
- Last updated2010-06-15 v1
- ChecksumA7AD2470EF63513A