4BOC

Structure of mitochondrial RNA polymerase elongation complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of Human Mitochondrial RNA Polymerase Elongation Complex

Schwinghammer, K.Cheung, A.C.M.Morozov, Y.I.Agaronyan, K.Temiakov, D.Cramer, P.

(2013) Nat Struct Mol Biol 20: 1298

  • DOI: 10.1038/nsmb.2683
  • Primary Citation of Related Structures:  
    4BOC

  • PubMed Abstract: 
  • Here we report the crystal structure of the human mitochondrial RNA polymerase (mtRNAP) transcription elongation complex, determined at 2.65-Å resolution. The structure reveals a 9-bp hybrid formed between the DNA template and the RNA transcript and one turn of DNA both upstream and downstream of the hybrid ...

    Here we report the crystal structure of the human mitochondrial RNA polymerase (mtRNAP) transcription elongation complex, determined at 2.65-Å resolution. The structure reveals a 9-bp hybrid formed between the DNA template and the RNA transcript and one turn of DNA both upstream and downstream of the hybrid. Comparisons with the distantly related RNA polymerase (RNAP) from bacteriophage T7 indicates conserved mechanisms for substrate binding and nucleotide incorporation but also strong mechanistic differences. Whereas T7 RNAP refolds during the transition from initiation to elongation, mtRNAP adopts an intermediary conformation that is capable of elongation without refolding. The intercalating hairpin that melts DNA during T7 RNAP initiation separates RNA from DNA during mtRNAP elongation. Newly synthesized RNA exits toward the pentatricopeptide repeat (PPR) domain, a unique feature of mtRNAP with conserved RNA-recognition motifs.


    Organizational Affiliation

    Gene Center, Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-DIRECTED RNA POLYMERASE, MITOCHONDRIAL A1088Homo sapiensMutation(s): 0 
Gene Names: POLRMT
EC: 2.7.7.6
Find proteins for O00411 (Homo sapiens)
Explore O00411 
Go to UniProtKB:  O00411
NIH Common Fund Data Resources
PHAROS:  O00411
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*CP*AP*TP*GP*GP*GP*GP*TP*AP*AP*TP*TP*AP*TP *TP*TP*CP*GP*AP*CP*GP*CP*CP*AP*GP*AP*CP*G)-3'N28synthetic construct
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 3
    MoleculeChainsLengthOrganismImage
    5'-R(*AP*GP*UP*CP*UP*GP*CP*GP*GP*CP*GP*CP*GP*CP)-3'R14synthetic construct
    Find similar nucleic acids by: 
    (by identity cutoff)  |  Structure
    Entity ID: 4
    MoleculeChainsLengthOrganismImage
    5'-D(*CP*GP*TP*CP*TP*GP*GP*CP*GP*TP*GP*CP*GP*CP *GP*CP*CP*GP*CP*TP*AP*CP*CP*CP*CP*AP*TP*G)-3'T28synthetic construct
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 2.65 Å
    • R-Value Free: 0.209 
    • R-Value Work: 0.179 
    • R-Value Observed: 0.181 
    • Space Group: I 2 3
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 225.19α = 90
    b = 225.19β = 90
    c = 225.19γ = 90
    Software Package:
    Software NamePurpose
    BUSTERrefinement
    MOSFLMdata reduction
    Aimlessdata scaling
    PHASERphasing

    Structure Validation

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    Entry History 

    Deposition Data

    Revision History  (Full details and data files)

    • Version 1.0: 2013-09-25
      Type: Initial release
    • Version 1.1: 2013-10-09
      Changes: Database references
    • Version 1.2: 2013-10-16
      Changes: Database references
    • Version 1.3: 2013-11-20
      Changes: Database references