1MDB

CRYSTAL STRUCTURE OF DhbE IN COMPLEX WITH DHB-ADENYLATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.217 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Crystal structure of DhbE, an archetype for aryl acid activating domains of modular nonribosomal peptide synthetases.

May, J.J.Kessler, N.Marahiel, M.A.Stubbs, M.T.

(2002) Proc Natl Acad Sci U S A 99: 12120-12125

  • DOI: https://doi.org/10.1073/pnas.182156699
  • Primary Citation of Related Structures:  
    1MD9, 1MDB, 1MDF

  • PubMed Abstract: 

    The synthesis of the catecholic siderophore bacillibactin is accomplished by the nonribosomal peptide synthetase (NRPS) encoded by the dhb operon. DhbE is responsible for the initial step in bacillibactin synthesis, the activation of the aryl acid 2,3-dihydroxybenzoate (DHB). The stand-alone adenylation (A) domain DhbE, the structure of which is presented here, exhibits greatest homology to other NRPS A-domains, acyl-CoA ligases and luciferases. It's structure is solved in three different states, without the ligands ATP and DHB (native state), with the product DHB-AMP (adenylate state) and with the hydrolyzed product AMP and DHB (hydrolyzed state). The 59.9-kDa protein folds into two domains, with the active site at the interface between them. In contrast to previous proposals of a major reorientation of the large and small domains on substrate binding, we observe only local structural rearrangements. The structure of the phosphate binding loop could be determined, a motif common to many adenylate-forming enzymes, as well as with bound DHB-adenylate and the hydrolyzed product DHB*AMP. Based on the structure and amino acid sequence alignments, an adapted specificity conferring code for aryl acid activating domains is proposed, allowing assignment of substrate specificity to gene products of previously unknown function.


  • Organizational Affiliation

    Biochemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
2,3-dihydroxybenzoate-AMP ligase539Bacillus subtilisMutation(s): 0 
EC: 6.3.2
UniProt
Find proteins for P40871 (Bacillus subtilis (strain 168))
Explore P40871 
Go to UniProtKB:  P40871
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40871
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.217 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.8α = 90
b = 66.8β = 90
c = 115.66γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-11
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description