5Z38

Crystal structure of CsrA bound to CesT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.234 

wwPDB Validation   3D Report Full Report


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Literature

Molecular basis of binding between the global post-transcriptional regulator CsrA and the T3SS chaperone CesT

Ye, F.Yang, F.Yu, R.Lin, X.Qi, J.Chen, Z.Cao, Y.Wei, Y.Gao, G.F.Lu, G.

(2018) Nat Commun 9: 1196-1196

  • DOI: 10.1038/s41467-018-03625-x
  • Primary Citation of Related Structures:  
    5Z38

  • PubMed Abstract: 
  • The T3SS chaperone CesT is recently shown to interact with the post-transcriptional regulator CsrA to modulate post-attachment signaling in enteropathogenic and enterohemorrhagic Escherichia coli. The molecular basis of the CesT/CsrA binding, however, remains elusive ...

    The T3SS chaperone CesT is recently shown to interact with the post-transcriptional regulator CsrA to modulate post-attachment signaling in enteropathogenic and enterohemorrhagic Escherichia coli. The molecular basis of the CesT/CsrA binding, however, remains elusive. Here, we show that CesT and CsrA both created two ligand binding sites in their homodimers, forming irregular multimeric complexes in solution. Through construction of a recombinant CsrA-dimer (Re-CsrA) that contains a single CesT binding site, the atomic binding features between CesT and CsrA are delineated via the structure of the CesT/Re-CsrA complex. In contrast to a previously reported N-terminally swapped dimer-form, CesT adopts a dimeric architecture with a swapped C-terminal helix for CsrA engagement. In CsrA, CesT binds to a surface patch that extensively overlaps with its mRNA binding site. The binding mode therefore justifies a mechanism of CsrA-modulation by CesT via competitive inhibition of the CsrA/mRNA interactions.


    Organizational Affiliation

    West China Hospital Emergency Department (WCHED), State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center of Biotherapy, Chengdu, Sichuan, 610041, China. lugw@scu.edu.cn.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CesT proteinA, B, C, D158Escherichia coliMutation(s): 0 
Gene Names: cesTERS085406_02303L537_036LIHIT_032
UniProt
Find proteins for Q47015 (Escherichia coli)
Explore Q47015 
Go to UniProtKB:  Q47015
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Truncated-CsrAE, G, I, K49Escherichia coli O127:H6 str. E2348/69Mutation(s): 0 
Gene Names: csrAE2348C_2959
UniProt
Find proteins for P69913 (Escherichia coli (strain K12))
Explore P69913 
Go to UniProtKB:  P69913
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
wild type CsrAF, H, J, L71Escherichia coli O127:H6 str. E2348/69Mutation(s): 0 
Gene Names: csrAE2348C_2959
UniProt
Find proteins for P69913 (Escherichia coli (strain K12))
Explore P69913 
Go to UniProtKB:  P69913
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.234 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 252.75α = 90
b = 52.546β = 96.73
c = 93.356γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Key R&D Program of ChinaChina2016YFC1200305
National Natural Science Foundation-Outstanding Youth FoundationChina81522026
Sichuan Outstanding Youth Science & Technology FundingChina2016JQ0001
Outstanding Youth Foundation of Sichuan UniversityChina2016SCU04B01
National Natural Science Foundation of ChinaChina81621091

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-04
    Type: Initial release