6YN0

Structure of E. coli PBP1b with a FtsN peptide activating transglycosylase activity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 

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This is version 1.2 of the entry. See complete history


Literature

The bacterial cell division protein fragment E FtsN binds to and activates the major peptidoglycan synthase PBP1b.

Boes, A.Kerff, F.Herman, R.Touze, T.Breukink, E.Terrak, M.

(2020) J Biol Chem 295: 18256-18265

  • DOI: 10.1074/jbc.RA120.015951
  • Primary Citation of Related Structures:  
    6YN0

  • PubMed Abstract: 
  • Peptidoglycan (PG) is an essential constituent of the bacterial cell wall. During cell division, the machinery responsible for PG synthesis localizes mid-cell, at the septum, under the control of a multiprotein complex called the divisome. In Escherichia coli , septal PG synthesis and cell constriction rely on the accumulation of FtsN at the division site ...

    Peptidoglycan (PG) is an essential constituent of the bacterial cell wall. During cell division, the machinery responsible for PG synthesis localizes mid-cell, at the septum, under the control of a multiprotein complex called the divisome. In Escherichia coli , septal PG synthesis and cell constriction rely on the accumulation of FtsN at the division site. Interestingly, a short sequence of FtsN (Leu 75 -Gln 93 , known as E FtsN) was shown to be essential and sufficient for its functioning in vivo , but what exactly this sequence is doing remained unknown. Here, we show that E FtsN binds specifically to the major PG synthase PBP1b and is sufficient to stimulate its biosynthetic glycosyltransferase (GTase) activity. We also report the crystal structure of PBP1b in complex with E FtsN, which demonstrates that E FtsN binds at the junction between the GTase and UB2H domains of PBP1b. Interestingly, mutations to two residues (R141A/R397A) within the E FtsN-binding pocket reduced the activation of PBP1b by FtsN but not by the lipoprotein LpoB. This mutant was unable to rescue the Δ ponB - ponA ts strain, which lacks PBP1b and has a thermosensitive PBP1a, at nonpermissive temperature and induced a mild cell-chaining phenotype and cell lysis. Altogether, the results show that E FtsN interacts with PBP1b and that this interaction plays a role in the activation of its GTase activity by FtsN, which may contribute to the overall septal PG synthesis and regulation during cell division.


    Organizational Affiliation

    InBioS-Centre d'Ingénierie des Protéines, Liège University, Liège, Belgium mterrak@uliege.be.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Penicillin-binding protein 1BA747Escherichia coli K-12Mutation(s): 0 
Gene Names: mrcBpbpFponBb0149JW0145
EC: 2.4.1.129 (PDB Primary Data), 3.4.16.4 (PDB Primary Data)
UniProt
Find proteins for P02919 (Escherichia coli (strain K12))
Explore P02919 
Go to UniProtKB:  P02919
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02919
Protein Feature View
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division protein FtsNB19Escherichia coli K-12Mutation(s): 0 
Gene Names: ftsNmsgAb3933JW3904
UniProt
Find proteins for P29131 (Escherichia coli (strain K12))
Explore P29131 
Go to UniProtKB:  P29131
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29131
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
M0E
Query on M0E

Download Ideal Coordinates CCD File 
C [auth A]MOENOMYCIN
C69 H106 N5 O34 P
NXPRJQIAIORCGO-ZLPAOQQDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.143α = 90
b = 283.021β = 90
c = 62.693γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
BUSTERrefinement
PDB_EXTRACTdata extraction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-11-04
    Type: Initial release
  • Version 1.1: 2020-11-11
    Changes: Database references
  • Version 1.2: 2021-01-06
    Changes: Database references