4KBM

Structure of the Mtb CarD/RNAP Beta subunit B1-B2 domains complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1146 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Mtb CarD/RNAP beta-Lobes Complex Reveals the Molecular Basis of Interaction and Presents a Distinct DNA-Binding Domain for Mtb CarD.

Gulten, G.Sacchettini, J.C.

(2013) Structure 21: 1859-1869

  • DOI: 10.1016/j.str.2013.08.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CarD from Mycobacterium tuberculosis (Mtb) is an essential protein shown to be involved in stringent response through downregulation of rRNA and ribosomal protein genes. CarD interacts with the β-subunit of RNAP and this interaction is vital for Mtb' ...

    CarD from Mycobacterium tuberculosis (Mtb) is an essential protein shown to be involved in stringent response through downregulation of rRNA and ribosomal protein genes. CarD interacts with the β-subunit of RNAP and this interaction is vital for Mtb's survival during the persistent infection state. We have determined the crystal structure of CarD in complex with the RNAP β-subunit β1 and β2 domains at 2.1 Å resolution. The structure reveals the molecular basis of CarD/RNAP interaction, providing a basis to further our understanding of RNAP regulation by CarD. The structural fold of the CarD N-terminal domain is conserved in RNAP interacting proteins such as TRCF-RID and CdnL, and displays similar interactions to the predicted homology model based on the TRCF/RNAP β1 structure. Interestingly, the structure of the C-terminal domain, which is required for complete CarD function in vivo, represents a distinct DNA-binding fold.


    Organizational Affiliation

    Department of Chemistry, Texas A&M University, College Station, TX 77843, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA-directed RNA polymerase subunit beta
A
409Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: rpoB
EC: 2.7.7.6
Find proteins for P9WGY9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WGY9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
RNA polymerase-binding transcription factor CarD
B
162Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: carD
Find proteins for P9WJG3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WJG3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1146 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.208 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 49.152α = 90.00
b = 128.889β = 90.00
c = 225.526γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXmodel building
HKL-2000data scaling
PHENIXphasing
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-02
    Type: Initial release
  • Version 1.1: 2013-10-09
    Type: Database references
  • Version 1.2: 2013-10-30
    Type: Database references