CryoEM structure of the transcription termination factor Rho from Mycobacterium tuberculosis

Experimental Data Snapshot

  • Resolution: 3.32 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Cryo-EM structure of transcription termination factor Rho from Mycobacterium tuberculosis reveals bicyclomycin resistance mechanism.

Saridakis, E.Vishwakarma, R.Lai-Kee-Him, J.Martin, K.Simon, I.Cohen-Gonsaud, M.Coste, F.Bron, P.Margeat, E.Boudvillain, M.

(2022) Commun Biol 5: 120-120

  • DOI: https://doi.org/10.1038/s42003-022-03069-6
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The bacterial Rho factor is a ring-shaped motor triggering genome-wide transcription termination and R-loop dissociation. Rho is essential in many species, including in Mycobacterium tuberculosis where rho gene inactivation leads to rapid death. Yet, the M. tuberculosis Rho [ Mtb Rho] factor displays poor NTPase and helicase activities, and resistance to the natural Rho inhibitor bicyclomycin [BCM] that remain unexplained. To address these issues, we solved the cryo-EM structure of Mtb Rho at 3.3 Å resolution. The Mtb Rho hexamer is poised into a pre-catalytic, open-ring state wherein specific contacts stabilize ATP in intersubunit ATPase pockets, thereby explaining the cofactor preference of Mtb Rho. We reveal a leucine-to-methionine substitution that creates a steric bulk in BCM binding cavities near the positions of ATP γ-phosphates, and confers resistance to BCM at the expense of motor efficiency. Our work contributes to explain the unusual features of Mtb Rho and provides a framework for future antibiotic development.

  • Organizational Affiliation

    Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", Ag. Paraskevi, 15310, Athens, Greece.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcription termination factor Rho
A, B, C, D, E
A, B, C, D, E, F
622Mycobacterium tuberculosisMutation(s): 0 
EC: 3.6.4
Find proteins for P9WHF3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WHF3 
Go to UniProtKB:  P9WHF3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WHF3
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ATP

Download Ideal Coordinates CCD File 
G [auth A]
H [auth B]
J [auth C]
L [auth D]
N [auth E]
G [auth A],
H [auth B],
J [auth C],
L [auth D],
N [auth E],
P [auth F]
C10 H16 N5 O13 P3
Query on MG

Download Ideal Coordinates CCD File 
I [auth B],
K [auth C],
M [auth D],
O [auth E],
Q [auth F]
Experimental Data & Validation

Experimental Data

  • Resolution: 3.32 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Agence Nationale de la Recherche (ANR)FranceANR-15-CE11-0024
European Union (EU)France665790

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-09
    Type: Initial release
  • Version 1.1: 2022-09-14
    Changes: Data collection, Database references