6ERP

Structure of the human mitochondrial transcription initiation complex at the LSP promoter


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.50 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.272 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis of Mitochondrial Transcription Initiation.

Hillen, H.S.Morozov, Y.I.Sarfallah, A.Temiakov, D.Cramer, P.

(2017) Cell 171: 1072-1081.e10

  • DOI: 10.1016/j.cell.2017.10.036
  • Primary Citation of Related Structures:  
    6ERP, 6ERO, 6ERQ

  • PubMed Abstract: 
  • Transcription in human mitochondria is driven by a single-subunit, factor-dependent RNA polymerase (mtRNAP). Despite its critical role in both expression and replication of the mitochondrial genome, transcription initiation by mtRNAP remains poorly u ...

    Transcription in human mitochondria is driven by a single-subunit, factor-dependent RNA polymerase (mtRNAP). Despite its critical role in both expression and replication of the mitochondrial genome, transcription initiation by mtRNAP remains poorly understood. Here, we report crystal structures of human mitochondrial transcription initiation complexes assembled on both light and heavy strand promoters. The structures reveal how transcription factors TFAM and TFB2M assist mtRNAP to achieve promoter-dependent initiation. TFAM tethers the N-terminal region of mtRNAP to recruit the polymerase to the promoter whereas TFB2M induces structural changes in mtRNAP to enable promoter opening and trapping of the DNA non-template strand. Structural comparisons demonstrate that the initiation mechanism in mitochondria is distinct from that in the well-studied nuclear, bacterial, or bacteriophage transcription systems but that similarities are found on the topological and conceptual level. These results provide a framework for studying the regulation of gene expression and DNA replication in mitochondria.


    Organizational Affiliation

    Department of Molecular Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany. Electronic address: patrick.cramer@mpibpc.mpg.de.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor A, mitochondrialCG205Homo sapiensMutation(s): 0 
Gene Names: TFAMTCF6TCF6L2
Find proteins for Q00059 (Homo sapiens)
Explore Q00059 
Go to UniProtKB:  Q00059
NIH Common Fund Data Resources
PHAROS  Q00059
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed RNA polymerase, mitochondrialAB1128Homo sapiensMutation(s): 1 
Gene Names: POLRMT
EC: 2.7.7.6
Find proteins for O00411 (Homo sapiens)
Explore O00411 
Go to UniProtKB:  O00411
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PHAROS  O00411
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Dimethyladenosine transferase 2, mitochondrialFJ377Homo sapiensMutation(s): 0 
Gene Names: TFB2MNS5ATP5
EC: 2.1.1
Find proteins for Q9H5Q4 (Homo sapiens)
Explore Q9H5Q4 
Go to UniProtKB:  Q9H5Q4
NIH Common Fund Data Resources
PHAROS  Q9H5Q4
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsLengthOrganismImage
Non-Template DNAD, H50Homo sapiens
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Entity ID: 3
MoleculeChainsLengthOrganismImage
Template DNAE, I50Homo sapiens
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.50 Å
  • R-Value Free: 0.310 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.272 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.91α = 90
b = 197.03β = 99.87
c = 137.21γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanySFB860
German Research FoundationGermanySPP1935
European Research CouncilGermany693023
Volkswagen FoundationGermany--
National Institutes of HealthUnited StatesRO1 GM104231
Boehringer Ingelheim FondsGermanyPhD Student Fellowship

Revision History 

  • Version 1.0: 2017-11-15
    Type: Initial release
  • Version 1.1: 2017-11-29
    Changes: Database references
  • Version 1.2: 2018-01-24
    Changes: Source and taxonomy
  • Version 1.3: 2018-01-31
    Changes: Author supporting evidence