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Crystal structure of LH2 B800-850 from Rps. acidophila at 2.0 Angstrom resolution
Biology and Chemistry Report
1NKZ
  •   Structure Details   Hide

    Structure Keywords

    Keywords MEMBRANE PROTEIN
    Text LIGHT HARVESTING COMPLEX II, TRANS-MEMBRANE HELICES, RHODOPIN GLUCOSIDE, BACTERIOCHLOROPHYLL A, PHOTOSYNTHESIS, MEMBRANE PROTEIN

    Polymeric Molecules

    Chain A,C,E
    Description Light-harvesting protein B-800/850, alpha chain 
    Nonstandard Linkage no 
    Nonstandard Monomers yes 
    Polymer Type polypeptide(L) 
    Formula Weight 5702.8 
    Source Method natural source  
    Entity Name Antenna pigment protein, alpha chain 
    Chain B,D,F
    Description Light-harvesting protein B-800/850, beta chain 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 4559.3 
    Source Method natural source  
    Entity Name Antenna pigment protein, beta chain 

    Ligands and Prosthetic Groups

    ID Name Chemical Formula Weight Ligand Structure
    BCL  BACTERIOCHLOROPHYLL A  C55 H74 Mg N4 O6   911.50  View 
    BEN  BENZAMIDINE  C7 H8 N2   120.15  View 
    BOG  B-OCTYLGLUCOSIDE  C14 H28 O6   292.37  View 
    RG1  RHODOPIN GLUCOSIDE  C46 H66 O6   715.01  View 
     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)
    A,C,E LHA4_RHOAC P26789     
    B,D,F LHB5_RHOAC P26790     

    Keywords and Names

    Chain(s) RCSB Name UniProtKB Name UniProtKB Keywords

    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,C,E
    GO ID   Ontology GO Term Definition
    18298   Protein Chromophore Linkage  The Covalent or Noncovalent Attachment of a Chromophore to a Protein. 
    19684   Photosynthesis Light Reaction  The Light Reactions of Photosynthesis Which Take Place in Photosystems Ii and I. Light Energy Is Harvested and Used to Power the Transfer of Electrons Among a Series of Electron Donors and Acceptors. the Final Electron Acceptor Is Nadp+ Which Is Reduced to Nadph. Nadph Generated From Light Reactions Is Used in Sugar Synthesis in Dark Reactions. Light Reactions Also Generate a Proton Motive Force Across the Thylakoid Membrane and the Proton Gradient Is Used to Synthesize Atp. There Are Two Chemical Reactions Involved in the Light Reactions: Water Oxidation in Photosystem Ii and Nadp Reduction in Photosystem I. 
    5886   Plasma Membrane  The Membrane Surrounding a Cell That Separates the Cell From Its External Environment. It Consists of a Phospholipid Bilayer and Associated Proteins. 
    16020   Membrane  Double Layer of Lipid Molecules That Encloses All Cells and in Eukaryotes Many Organelles; May Be a Single or Double Lipid Bilayer; Also Includes Associated Proteins. 
    16021   Integral Component of Membrane  The Component of a Membrane Consisting of Gene Products and Protein Complexes That Have Some Part That Penetrates At Least One Leaflet of the Membrane Bilayer. This Component Includes Gene Products That Are Buried in the Bilayer with No Exposure Outside the Bilayer. 
    19866   Organelle Inner Membrane  The Inner I.e. Lumen Facing Lipid Bilayer of an Organelle Envelope; Usually Highly Selective to Most Ions and Metabolites. 
    30076   Light Harvesting Complex  A Protein Pigment Complex That May Be Closely or Peripherally Associated to Photosynthetic Reaction Centers That Participate in Harvesting and Transferring Radiant Energy to the Reaction Center. 
    30077   Plasma Membrane Light Harvesting Complex  A Plasma Membrane Protein Pigment Complex That May Be Closely or Peripherally Associated to Photosynthetic Reaction Centers That Participate in Harvesting and Transferring Radiant Energy to the Reaction Center. Examples of This Complex Are Found in Bacterial Species. 
    16168   Chlorophyll Binding  Interacting Selectively and Non Covalently with Chlorophyll; Any Compound of Magnesium Complexed in a Porphyrin (tetrapyrrole) Ring and Which Functions As a Photosynthetic Pigment. 
    42314   Bacteriochlorophyll Binding  Interacting Selectively and Non Covalently with Bacteriochlorophyll a Form of Chlorophyll Found in Photosynthetic Bacteria Such As the Purple and Green Bacteria. There Are Several Types Designated a to G. Bacteriochlorophyll a and Bacteriochlorophyll B Are Structurally Similar to the Chlorophyll a and Chlorophyll B Found in Plants. 
    45156   Electron Transporter Transferring Electrons Within the Cyclic Electron Transport Pathway of Photosynthesis Activity  Enables the Directed Movement of Electrons Within the Cyclic Electron Transport Pathway of Photosynthesis. 
    46872   Metal Ion Binding  Interacting Selectively and Non Covalently with Any Metal Ion. 
    Chain B,D,F
    GO ID   Ontology GO Term Definition
    18298   Protein Chromophore Linkage  The Covalent or Noncovalent Attachment of a Chromophore to a Protein. 
    19684   Photosynthesis Light Reaction  The Light Reactions of Photosynthesis Which Take Place in Photosystems Ii and I. Light Energy Is Harvested and Used to Power the Transfer of Electrons Among a Series of Electron Donors and Acceptors. the Final Electron Acceptor Is Nadp+ Which Is Reduced to Nadph. Nadph Generated From Light Reactions Is Used in Sugar Synthesis in Dark Reactions. Light Reactions Also Generate a Proton Motive Force Across the Thylakoid Membrane and the Proton Gradient Is Used to Synthesize Atp. There Are Two Chemical Reactions Involved in the Light Reactions: Water Oxidation in Photosystem Ii and Nadp Reduction in Photosystem I. 
    5886   Plasma Membrane  The Membrane Surrounding a Cell That Separates the Cell From Its External Environment. It Consists of a Phospholipid Bilayer and Associated Proteins. 
    16020   Membrane  Double Layer of Lipid Molecules That Encloses All Cells and in Eukaryotes Many Organelles; May Be a Single or Double Lipid Bilayer; Also Includes Associated Proteins. 
    16021   Integral Component of Membrane  The Component of a Membrane Consisting of Gene Products and Protein Complexes That Have Some Part That Penetrates At Least One Leaflet of the Membrane Bilayer. This Component Includes Gene Products That Are Buried in the Bilayer with No Exposure Outside the Bilayer. 
    30076   Light Harvesting Complex  A Protein Pigment Complex That May Be Closely or Peripherally Associated to Photosynthetic Reaction Centers That Participate in Harvesting and Transferring Radiant Energy to the Reaction Center. 
    30077   Plasma Membrane Light Harvesting Complex  A Plasma Membrane Protein Pigment Complex That May Be Closely or Peripherally Associated to Photosynthetic Reaction Centers That Participate in Harvesting and Transferring Radiant Energy to the Reaction Center. Examples of This Complex Are Found in Bacterial Species. 
    16168   Chlorophyll Binding  Interacting Selectively and Non Covalently with Chlorophyll; Any Compound of Magnesium Complexed in a Porphyrin (tetrapyrrole) Ring and Which Functions As a Photosynthetic Pigment. 
    42314   Bacteriochlorophyll Binding  Interacting Selectively and Non Covalently with Bacteriochlorophyll a Form of Chlorophyll Found in Photosynthetic Bacteria Such As the Purple and Green Bacteria. There Are Several Types Designated a to G. Bacteriochlorophyll a and Bacteriochlorophyll B Are Structurally Similar to the Chlorophyll a and Chlorophyll B Found in Plants. 
    45156   Electron Transporter Transferring Electrons Within the Cyclic Electron Transport Pathway of Photosynthesis Activity  Enables the Directed Movement of Electrons Within the Cyclic Electron Transport Pathway of Photosynthesis. 
    46872   Metal Ion Binding  Interacting Selectively and Non Covalently with Any Metal Ion. 


     
  •   Gene Details   Hide

    Natural Source

    Chain B,D,F
    Scientific Name Rhodoblastus acidophilus  
    Genus Rhodoblastus
    Strain 10050
    Chain A,C,E
    Scientific Name Rhodoblastus acidophilus  
    Genus Rhodoblastus
    Strain 10050
    Details Cell Membrane

    Genetic Source