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Mutational analysis of sulfite reductase hemoprotein reveals the mechanism for coordinated electron and proton transfer
Biology and Chemistry Report
4G39
  •   Structure Details   Hide

    Structure Keywords

    Keywords OXIDOREDUCTASE
    Text SNiRR, oxidoreductase, sulfite reductase flavoprotein

    Polymeric Molecules

    Chain A
    Description Sulfite reductase [NADPH] hemoprotein beta-component 
    Fragment sulfite reductase hemoprotein (unp residues 81-570) 
    Mutation R153S 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 64021.6 
    Source Method genetically manipulated  
    Entity Name SiR-HP, SiRHP 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    POTASSIUM ION  K   39.10  View 
    PO4  PHOSPHATE ION  O4 P   94.97  View 
    SF4  IRON/SULFUR CLUSTER  Fe4 S4   351.64  View 
    SRM  SIROHEME  C42 H42 Fe N4 O16   914.65  View 
     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A CYSI_ECOLI P17846     

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc
    1.8.1.2      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A
    GO ID   Ontology GO Term Definition
    103   Sulfate Assimilation  The Pathways by Which Inorganic Sulfate Is Processed and Incorporated Into Sulfated Compounds. 
    8652   Cellular Amino Acid Biosynthetic Process  The Chemical Reactions and Pathways Resulting in the Formation of Amino Acids Organic Acids Containing One or More Amino Substituents. 
    19344   Cysteine Biosynthetic Process  The Chemical Reactions and Pathways Resulting in the Formation of Cysteine 2 Amino 3 Mercaptopropanoic Acid. 
    55114   Oxidation Reduction Process  A Metabolic Process That Results in the Removal or Addition of One or More Electrons to or From a Substance with or Without the Concomitant Removal or Addition of a Proton or Protons. 
    70814   Hydrogen Sulfide Biosynthetic Process  The Chemical Reactions and Pathways Resulting in the Formation of Hydrogen Sulfide H2s. 
    9337   Sulfite Reductase Complex (nadph)  A Multisubunit Iron Flavoprotein Which in Yeast Is Composed of 2 Alpha and 2 Beta Subunits. Catalyzes the Reduction of Sulfite to Sulfide. 
    4783   Sulfite Reductase (nadph) Activity  Catalysis of the Reaction: Hydrogen Sulfide + 3 Nadp+ + 3 H2o = Sulfite + 3 Nadph + 3 H+. 
    16491   Oxidoreductase Activity  Catalysis of an Oxidation Reduction (redox) Reaction a Reversible Chemical Reaction in Which the Oxidation State of an Atom or Atoms Within a Molecule Is Altered. One Substrate Acts As a Hydrogen or Electron Donor and Becomes Oxidized While the Other Acts As Hydrogen or Electron Acceptor and Becomes Reduced. 
    20037   Heme Binding  Interacting Selectively and Non Covalently with Heme Any Compound of Iron Complexed in a Porphyrin (tetrapyrrole) Ring. 
    46872   Metal Ion Binding  Interacting Selectively and Non Covalently with Any Metal Ion. 
    50661   Nadp Binding  Interacting Selectively and Non Covalently with Nicotinamide Adenine Dinucleotide Phosphate a Coenzyme Involved in Many Redox and Biosynthetic Reactions; Binding May Be to Either the Oxidized Form Nadp+ or the Reduced Form Nadph. 
    51536   Iron Sulfur Cluster Binding  Interacting Selectively and Non Covalently with an Iron Sulfur Cluster a Combination of Iron and Sulfur Atoms. 
    51539   4 Iron 4 Sulfur Cluster Binding  Interacting Selectively and Non Covalently with a 4 Iron 4 Sulfur (4fe 4s) Cluster; This Cluster Consists of Four Iron Atoms with the Inorganic Sulfur Atoms Found Between the Irons and Acting As Bridging Ligands. 


     
  •   Gene Details   Hide

    Genetic Source

    Chain A
    Scientific Name Escherichia coli  
    Strain K12
    Gene b2763, cysi, jw2733
    Host Scientific Name Escherichia coli  
    Host Strain Lmg194
    Host Vector Type Plasmid
    Host Plasmid Name pBAD/myc-hisA