6C31

Crystal structure of TetR family protein Rv0078 in complex with DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cytokinin Signaling in Mycobacterium tuberculosis.

Samanovic, M.I.Hsu, H.C.Jones, M.B.Jones, V.McNeil, M.R.Becker, S.H.Jordan, A.T.Strnad, M.Xu, C.Jackson, M.Li, H.Darwin, K.H.

(2018) mBio 9

  • DOI: 10.1128/mBio.00989-18
  • Primary Citation of Related Structures:  
    5WM9, 6C31

  • PubMed Abstract: 
  • It was recently reported that the human-exclusive pathogen Mycobacterium tuberculosis secretes cytokinins, which had only been known as plant hormones. While cytokinins are well-established, adenine-based signaling molecules in plants, they have never been shown to participate in signal transduction in other kingdoms of life ...

    It was recently reported that the human-exclusive pathogen Mycobacterium tuberculosis secretes cytokinins, which had only been known as plant hormones. While cytokinins are well-established, adenine-based signaling molecules in plants, they have never been shown to participate in signal transduction in other kingdoms of life. M. tuberculosis is not known to interact with plants. Therefore, we tested the hypothesis that cytokinins trigger transcriptional changes within this bacterial species. Here, we show cytokinins induced the strong expression of the M. tuberculosis gene Rv0077c. We found that Rv0077c expression is repressed by a TetR-like transcriptional repressor, Rv0078. Strikingly, cytokinin-induced expression of Rv0077c resulted in a loss of acid-fast staining of M. tuberculosis While acid-fast staining is thought to be associated with changes in the bacterial cell envelope and virulence, Rv0077c-induced loss of acid-fastness did not affect antibiotic susceptibility or attenuate bacterial growth in mice, consistent with an unaltered mycolic acid profile of Rv0077c-expressing cells. Collectively, these findings show cytokinins signal transcriptional changes that can affect M. tuberculosis acid-fastness and that cytokinin signaling is no longer limited to the kingdom Plantae. IMPORTANCE Cytokinins have only previously been known as plant hormones. The discovery that they can be used as signaling molecules outside of plants broadens the repertoire of small molecules that can potentially affect gene expression in all domains of life.


    Organizational Affiliation

    Department of Microbiology, New York University School of Medicine, New York, New York, USA Huilin.Li@vai.org heran.darwin@med.nyu.edu.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TetR family transcriptional regulatorA, B, C, D, E, F, G, H214Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: LH57_00450Rv0078
UniProt
Find proteins for O53623 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore O53623 
Go to UniProtKB:  O53623
Protein Feature View
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*AP*CP*AP*AP*GP*CP*AP*GP*AP*CP*TP*GP*CP*CP*GP*GP*TP*AP*AP*C)-3')I, K23Mycobacterium tuberculosis H37Rv
Protein Feature View
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA (5'-D(*GP*TP*TP*AP*CP*CP*GP*GP*CP*AP*GP*TP*CP*TP*GP*CP*TP*TP*GP*TP*AP*AP*A)-3')J, L23Mycobacterium tuberculosis H37Rv
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.206 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.039α = 90
b = 80.04β = 90.07
c = 186.66γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-01-09 
  • Released Date: 2018-07-04 
  • Deposition Author(s): Hsu, H.C., Li, H.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI070285

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-04
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence