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N149W variant of SiRHP bound to sulfite
Biology and Chemistry Report
  •   Structure Details   Hide

    Structure Keywords

    Keywords oxidoreductase/substrate
    Text oxidoreductase, siroheme-binding protein, iron-sulfur cluster, S/NiRR, oxidoreductase-substrate complex

    Polymeric Molecules

    Chain A
    Description Sulfite reductase [NADPH] hemoprotein beta-component 
    Fragment unp residues 64-570 
    Mutation N149W 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 57020.8 
    Source Method genetically manipulated  
    Entity Name SiR-HP, SiRHP 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    NA  SODIUM ION  Na   22.99  View 
    SF4  IRON/SULFUR CLUSTER  Fe4 S4   351.64  View 
    SO3  SULFITE ION  O3 S   80.06  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     

    EC, Associated Pathways and Catalytic Sites

    Chain(s) IUBMB KEGG BioCyc      
    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A
    GO ID   Ontology GO Term Definition
    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. 
    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. 
    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. 
    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 K-12
    Gene b2763, cysi, jw2733
    Host Scientific Name Escherichia coli  
    Host Strain Lmg194
    Host Vector Type Plasmid
    Host Plasmid Name pBADhisA