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 

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

  • 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 ...

    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

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-DIRECTED RNA POLYMERASE, MITOCHONDRIAL
A
1088Homo sapiensMutation(s): 0 
Gene Names: POLRMT
EC: 2.7.7.6
Find proteins for O00411 (Homo sapiens)
Go to Gene View: POLRMT
Go to UniProtKB:  O00411
Entity ID: 2
MoleculeChainsLengthOrganism
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
Entity ID: 3
MoleculeChainsLengthOrganism
5'-R(*AP*GP*UP*CP*UP*GP*CP*GP*GP*CP*GP*CP*GP*CP)-3'R14synthetic construct
Entity ID: 4
MoleculeChainsLengthOrganism
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 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 225.190α = 90.00
b = 225.190β = 90.00
c = 225.190γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
MOSFLMdata reduction
PHASERphasing
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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