An Information Portal to 111558 Biological Macromolecular Structures

Crystal structure of the N-terminal truncated selenocysteine synthase SelA
Biology and Chemistry Report
  •   Structure Details   Hide

    Structure Keywords

    Keywords TRANSFERASE
    Text homodecamer, pentamer of dimers, fold-type I pyridoxal 5'-phosphate (PLP) dependent enzyme, L-seryl-tRNA(Sec) selenium transferase, selenocysteine synthesis, selenium metabolism, TRANSFERASE

    Polymeric Molecules

    Chain A,B,C,D,E,F,G,H,I,J
    Description L-seryl-tRNA(Sec) selenium transferase 
    Fragment the core and C-terminal domains, UNP residues 62-452 
    Nonstandard Linkage no 
    Nonstandard Monomers yes 
    Polymer Type polypeptide(L) 
    Formula Weight 44375.8 
    Source Method genetically manipulated  
    Entity Name Selenocysteine synthase, Sec synthase, Selenocysteinyl-tRNA(Sec) synthase 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    POTASSIUM ION  K   39.10  View 
    PT  PLATINUM (II) ION  Pt   195.08  View 
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,B,C,D,E,F,G,H,I,J SELA_AQUAE O67140     

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    A B C D E F G H I J      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,B,C,D,E,F,G,H,I,J
    GO ID   Ontology GO Term Definition
    1514   Selenocysteine Incorporation  The Incorporation of Selenocysteine Into a Peptide; Uses a Special TRNA That Recognizes the Uga Codon As Selenocysteine Rather Than As a Termination Codon. Selenocysteine Is Synthesized From Serine Before Its Incorporation; It Is Not a Posttranslational Modification of Peptidyl Cysteine. 
    5737   Cytoplasm  All of the Contents of a Cell Excluding the Plasma Membrane and Nucleus But Including Other Subcellular Structures. 
    3824   Catalytic Activity  Catalysis of a Biochemical Reaction At Physiological Temperatures. in Biologically Catalyzed Reactions the Reactants Are Known As Substrates and the Catalysts Are Naturally Occurring Macromolecular Substances Known As Enzymes. Enzymes Possess Specific Binding Sites For Substrates and Are Usually Composed Wholly or Largely of Protein But RNA That Has Catalytic Activity (ribozyme) Is Often Also Regarded As Enzymatic. 
    4125   L Seryl Trnasec Selenium Transferase Activity  Catalysis of the Reaction: L Seryl Trna(sec) + Selenophosphate = L Selenocysteinyl Trna(sec) + H2o + Phosphate. 

  •   Gene Details   Hide

    Genetic Source

    Chain A,B,C,D,E,F,G,H,I,J
    Scientific Name Aquifex aeolicus  
    Strain VF5
    Gene sela
    Host Scientific Name Escherichia coli  
    Host Strain Rosetta 2(de3)
    Host Vector Type Plasmid
    Host Plasmid Name pET22b

    Genome Information

    Chromosome Locus Gene ID Gene Name Symbol
    - - 1193774     selenocysteine synthase SELA