5Y4S

Structure of a methyltransferase complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.405 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural analyses unravel the molecular mechanism of cyclic di-GMP regulation of bacterial chemotaxis via a PilZ adaptor protein.

Yan, X.F.Xin, L.Yen, J.T.Zeng, Y.Jin, S.Cheang, Q.W.Fong, R.A.C.Y.Chiam, K.H.Liang, Z.X.Gao, Y.G.

(2018) J. Biol. Chem. 293: 100-111

  • DOI: 10.1074/jbc.M117.815704
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The bacterial second messenger cyclic di-GMP (c-di-GMP) has emerged as a prominent mediator of bacterial physiology, motility, and pathogenicity. c-di-GMP often regulates the function of its protein targets through a unique mechanism that involves a ...

    The bacterial second messenger cyclic di-GMP (c-di-GMP) has emerged as a prominent mediator of bacterial physiology, motility, and pathogenicity. c-di-GMP often regulates the function of its protein targets through a unique mechanism that involves a discrete PilZ adaptor protein. However, the molecular mechanism for PilZ protein-mediated protein regulation is unclear. Here, we present the structure of the PilZ adaptor protein MapZ cocrystallized in complex with c-di-GMP and its protein target CheR1, a chemotaxis-regulating methyltransferase in Pseudomonas aeruginosa This cocrystal structure, together with the structure of free CheR1, revealed that the binding of c-di-GMP induces dramatic structural changes in MapZ that are crucial for CheR1 binding. Importantly, we found that restructuring and repositioning of two C-terminal helices enable MapZ to disrupt the CheR1 active site by dislodging a structural domain. The crystallographic observations are reinforced by protein-protein binding and single cell-based flagellar motor switching analyses. Our studies further suggest that the regulation of chemotaxis by c-di-GMP through MapZ orthologs/homologs is widespread in proteobacteria and that the use of allosterically regulated C-terminal motifs could be a common mechanism for PilZ adaptor proteins. Together, the findings provide detailed structural insights into how c-di-GMP controls the activity of an enzyme target indirectly through a PilZ adaptor protein.


    Organizational Affiliation

    From the School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chemotaxis protein methyltransferase 1
A, B, C, D, E, F, G, H, I, J
294Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: cheR1
EC: 2.1.1.80
Find proteins for O87131 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  O87131
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.405 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.260 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 279.545α = 90.00
b = 279.545β = 90.00
c = 138.799γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Education (Singapore)SingaporeTier 1 RG43/15

Revision History 

  • Version 1.0: 2017-11-29
    Type: Initial release
  • Version 1.1: 2018-01-17
    Type: Database references