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X-ray crystal structure of Escherichia coli sigma70 holoenzyme
Biology and Chemistry Report
4IGC
  •   Structure Details   Hide

    Structure Keywords

    Keywords TRANSCRIPTION, TRANSFERASE
    Text RNA polymerase, protein, DNA, RNA, TRANSCRIPTION, TRANSFERASE

    Polymeric Molecules

    Chain A,B,F,G
    Description DNA-directed RNA polymerase subunit alpha 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 36559.0 
    Source Method genetically manipulated  
    Entity Name RNAP subunit alpha, RNA polymerase subunit alpha, Transcriptase subunit alpha 
    Chain C,H
    Description DNA-directed RNA polymerase subunit beta 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 150822.0 
    Source Method genetically manipulated  
    Entity Name RNAP subunit beta, RNA polymerase subunit beta, Transcriptase subunit beta 
    Chain D,I
    Description DNA-directed RNA polymerase subunit beta' 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 155368.0 
    Source Method genetically manipulated  
    Entity Name RNAP subunit beta', RNA polymerase subunit beta', Transcriptase subunit beta' 
    Chain E,J
    Description DNA-directed RNA polymerase subunit omega 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 10249.6 
    Source Method genetically manipulated  
    Entity Name RNAP omega subunit, RNA polymerase omega subunit, Transcriptase subunit omega 
    Chain X,Y
    Description RNA polymerase sigma factor RpoD 
    Nonstandard Linkage no 
    Nonstandard Monomers no 
    Polymer Type polypeptide(L) 
    Formula Weight 70352.8 
    Source Method genetically manipulated  
    Entity Name Sigma-70 

     
  •   Protein Details   Hide

    UniProtKB Information

    Chain SWS/UNP ID SWS/UNP Accession(s)

    C: Cellular Location | F: Molecular Function | P: Biological Process
    Chain A,B,F,G
    GO ID   Ontology GO Term Definition
    6351   Transcription DNA Templated  The Cellular Synthesis of RNA On a Template of Dna. 
    3677   DNA Binding  Any Molecular Function by Which a Gene Product Interacts Selectively and Non Covalently with DNA (deoxyribonucleic Acid). 
    3899   DNA Directed RNA Polymerase Activity  Catalysis of the Reaction: Nucleoside Triphosphate + Rna(n) = Diphosphate + Rna(n+1). Utilizes a DNA Template I.e. the Catalysis of DNA Template Directed Extension of the 3' End of an RNA Strand by One Nucleotide At a Time. Can Initiate a Chain 'de Novo'. 
    46983   Protein Dimerization Activity  The Formation of a Protein Dimer a Macromolecular Structure Consists of Two Noncovalently Associated Identical or Nonidentical Subunits. 
    Chain C,H
    GO ID   Ontology GO Term Definition
    6351   Transcription DNA Templated  The Cellular Synthesis of RNA On a Template of Dna. 
    3677   DNA Binding  Any Molecular Function by Which a Gene Product Interacts Selectively and Non Covalently with DNA (deoxyribonucleic Acid). 
    3899   DNA Directed RNA Polymerase Activity  Catalysis of the Reaction: Nucleoside Triphosphate + Rna(n) = Diphosphate + Rna(n+1). Utilizes a DNA Template I.e. the Catalysis of DNA Template Directed Extension of the 3' End of an RNA Strand by One Nucleotide At a Time. Can Initiate a Chain 'de Novo'. 
    32549   Ribonucleoside Binding  Interacting Selectively and Non Covalently with a Ribonucleoside a Compound Consisting of a Purine or Pyrimidine Nitrogenous Base Linked to Ribose. 
    Chain D,I
    GO ID   Ontology GO Term Definition
    6351   Transcription DNA Templated  The Cellular Synthesis of RNA On a Template of Dna. 
    3677   DNA Binding  Any Molecular Function by Which a Gene Product Interacts Selectively and Non Covalently with DNA (deoxyribonucleic Acid). 
    3899   DNA Directed RNA Polymerase Activity  Catalysis of the Reaction: Nucleoside Triphosphate + Rna(n) = Diphosphate + Rna(n+1). Utilizes a DNA Template I.e. the Catalysis of DNA Template Directed Extension of the 3' End of an RNA Strand by One Nucleotide At a Time. Can Initiate a Chain 'de Novo'. 
    Chain E,J
    GO ID   Ontology GO Term Definition
    6351   Transcription DNA Templated  The Cellular Synthesis of RNA On a Template of Dna. 
    3677   DNA Binding  Any Molecular Function by Which a Gene Product Interacts Selectively and Non Covalently with DNA (deoxyribonucleic Acid). 
    3899   DNA Directed RNA Polymerase Activity  Catalysis of the Reaction: Nucleoside Triphosphate + Rna(n) = Diphosphate + Rna(n+1). Utilizes a DNA Template I.e. the Catalysis of DNA Template Directed Extension of the 3' End of an RNA Strand by One Nucleotide At a Time. Can Initiate a Chain 'de Novo'. 
    Chain X,Y
    GO ID   Ontology GO Term Definition
    6352   DNA Templated Transcription Initiation  Any Process Involved in the Assembly of the RNA Polymerase Preinitiation Complex (pic) At the Core Promoter Region of a DNA Template Resulting in the Subsequent Synthesis of RNA From That Promoter. the Initiation Phase Includes Pic Assembly and the Formation of the First Few Bonds in the RNA Chain Including Abortive Initiation Which Occurs When the First Few Nucleotides Are Repeatedly Synthesized and Then Released. the Initiation Phase Ends Just Before and Does Not Include Promoter Clearance or Release Which Is the Transition Between the Initiation and Elongation Phases of Transcription. 
    6355   Regulation of Transcription DNA Templated  Any Process That Modulates the Frequency Rate or Extent of Cellular DNA Templated Transcription. 
    3677   DNA Binding  Any Molecular Function by Which a Gene Product Interacts Selectively and Non Covalently with DNA (deoxyribonucleic Acid). 
    3700   Sequence Specific DNA Binding Transcription Factor Activity  Interacting Selectively and Non Covalently with a Specific DNA Sequence in Order to Modulate Transcription. the Transcription Factor May or May Not Also Interact Selectively with a Protein or Macromolecular Complex. 
    16987   Sigma Factor Activity  A Sigma Factor Is the Promoter Specificity Subunit of Eubacterial Type Multisubunit RNA Polymerases Those Whose Core Subunit Composition Is Often Described As Alpha(2) Beta Beta Prime. (this Type of Multisubunit RNA Polymerase Complex Is Known to Be Found in Eubacteria and Plant Plastids). Although Sigma Does Not Bind DNA On Its Own When Combined with the Core to Form the Holoenzyme This Binds Specifically to Promoter Sequences with the Sigma Factor Making Sequence Specific Contacts with the Promoter Elements. the Sigma Subunit Is Released From the Elongating Form of the Polymerase and Is Thus Free to Act Catalytically For Multiple RNA Polymerase Core Enzymes. 


     
  •   Gene Details   Hide

    Genetic Source

    Chain X,Y
    Scientific Name Escherichia coli  
    Strain K12
    Gene rpod, alt, b3067, jw3039
    Host Scientific Name Escherichia coli  


    Chain E,J
    Scientific Name Escherichia coli  
    Strain K-12 SUBSTR. MDS42
    Gene rpoz, ecmds42_3083
    Host Scientific Name Escherichia coli  


    Chain D,I
    Scientific Name Escherichia coli  
    Strain K12
    Gene rpoc, tabb, b3988, jw3951
    Host Scientific Name Escherichia coli  


    Chain C,H
    Scientific Name Escherichia coli  
    Strain K12
    Gene rpob, gron, nitb, rif, ron, stl, stv, tabd, b3987, jw3950
    Host Scientific Name Escherichia coli  


    Chain A,B,F,G
    Scientific Name Escherichia coli  
    Strain K12
    Gene rpoa, pez, phs, sez, b3295, jw3257
    Host Scientific Name Escherichia coli