3LJC

Crystal structure of Lon N-terminal domain.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the N-terminal fragment of Escherichia coli Lon protease

Li, M.Gustchina, A.Rasulova, F.S.Melnikov, E.E.Maurizi, M.R.Rotanova, T.V.Dauter, Z.Wlodawer, A.

(2010) Acta Crystallogr.,Sect.D 66: 865-873

  • DOI: 10.1107/S0907444910019554

  • PubMed Abstract: 
  • The structure of a recombinant construct consisting of residues 1-245 of Escherichia coli Lon protease, the prototypical member of the A-type Lon family, is reported. This construct encompasses all or most of the N-terminal domain of the enzyme. The ...

    The structure of a recombinant construct consisting of residues 1-245 of Escherichia coli Lon protease, the prototypical member of the A-type Lon family, is reported. This construct encompasses all or most of the N-terminal domain of the enzyme. The structure was solved by SeMet SAD to 2.6 A resolution utilizing trigonal crystals that contained one molecule in the asymmetric unit. The molecule consists of two compact subdomains and a very long C-terminal alpha-helix. The structure of the first subdomain (residues 1-117), which consists mostly of beta-strands, is similar to that of the shorter fragment previously expressed and crystallized, whereas the second subdomain is almost entirely helical. The fold and spatial relationship of the two subdomains, with the exception of the C-terminal helix, closely resemble the structure of BPP1347, a 203-amino-acid protein of unknown function from Bordetella parapertussis, and more distantly several other proteins. It was not possible to refine the structure to satisfactory convergence; however, since almost all of the Se atoms could be located on the basis of their anomalous scattering the correctness of the overall structure is not in question. The structure reported here was also compared with the structures of the putative substrate-binding domains of several proteins, showing topological similarities that should help in defining the binding sites used by Lon substrates.


    Organizational Affiliation

    Protein Structure Section, Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, Frederick, MD 21702-1201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-dependent protease La
A
252Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: lon (capR, deg, lopA, muc)
EC: 3.4.21.53
Find proteins for P0A9M0 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9M0
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.233 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 91.568α = 90.00
b = 91.568β = 90.00
c = 81.862γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MAR345data collection
HKL-3000data reduction
REFMACrefinement
SHELXSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2017-11-01
    Type: Advisory, Refinement description