An Information Portal to 110619 Biological Macromolecular Structures

High-resolution crystal structure of wild-type KSI in the apo form at neutral pH
Biology and Chemistry Report
  •   Structure Details   Hide

    Structure Keywords

    Keywords Isomerase
    Text Alpha-beta roll, Isomerase, Steroid, OXYANION-HOLE, Intracellular

    Polymeric Molecules

    Chain A,B
    Description Steroid Delta-isomerase 
    Fragment UNP RESIDUES 3-131 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 14504.5 
    Source Method genetically manipulated  
    Entity Name Delta(5)-3-ketosteroid isomerase 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    SO4  SULFATE ION  O4 S   96.06  View 
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,B SDIS_PSEPU P07445     

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    A B      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,B
    GO ID   Ontology GO Term Definition
    6629   Lipid Metabolic Process  The Chemical Reactions and Pathways Involving Lipids Compounds Soluble in an Organic Solvent But Not or Sparingly in an Aqueous Solvent. Includes Fatty Acids; Neutral Fats Other Fatty Acid Esters and Soaps; Long Chain (fatty) Alcohols and Waxes; Sphingoids and Other Long Chain Bases; Glycolipids Phospholipids and Sphingolipids; and Carotenes Polyprenols Sterols Terpenes and Other Isoprenoids. 
    8202   Steroid Metabolic Process  The Chemical Reactions and Pathways Involving Steroids Compounds with a 1 2 Cyclopentanoperhydrophenanthrene Nucleus. 
    4769   Steroid Delta Isomerase Activity  Catalysis of the Reaction: a 3 Oxo Delta(5) Steroid = a 3 Oxo Delta(4) Steroid. 
    16853   Isomerase Activity  Catalysis of the Geometric or Structural Changes Within One Molecule. Isomerase Is the Systematic Name For Any Enzyme of EC Class 5. 

  •   Gene Details   Hide

    Genetic Source

    Chain A,B
    Scientific Name Pseudomonas putida  
    Gene ksi
    Host Scientific Name Escherichia coli  
    Host Strain Bl21(de3)
    Host Vector Type Plasmid
    Host Plasmid Name pET28