3A7L

Crystal structure of E. coli apoH-protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Global conformational change associated with the two-step reaction catalyzed by Escherichia coli lipoate-protein ligase A.

Fujiwara, K.Maita, N.Hosaka, H.Okamura-Ikeda, K.Nakagawa, A.Taniguchi, H.

(2010) J.Biol.Chem. 285: 9971-9980

  • DOI: 10.1074/jbc.M109.078717
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Lipoate-protein ligase A (LplA) catalyzes the attachment of lipoic acid to lipoate-dependent enzymes by a two-step reaction: first the lipoate adenylation reaction and, second, the lipoate transfer reaction. We previously determined the crystal struc ...

    Lipoate-protein ligase A (LplA) catalyzes the attachment of lipoic acid to lipoate-dependent enzymes by a two-step reaction: first the lipoate adenylation reaction and, second, the lipoate transfer reaction. We previously determined the crystal structure of Escherichia coli LplA in its unliganded form and a binary complex with lipoic acid (Fujiwara, K., Toma, S., Okamura-Ikeda, K., Motokawa, Y., Nakagawa, A., and Taniguchi, H. (2005) J Biol. Chem. 280, 33645-33651). Here, we report two new LplA structures, LplA.lipoyl-5'-AMP and LplA.octyl-5'-AMP.apoH-protein complexes, which represent the post-lipoate adenylation intermediate state and the pre-lipoate transfer intermediate state, respectively. These structures demonstrate three large scale conformational changes upon completion of the lipoate adenylation reaction: movements of the adenylate-binding and lipoate-binding loops to maintain the lipoyl-5'-AMP reaction intermediate and rotation of the C-terminal domain by about 180 degrees . These changes are prerequisites for LplA to accommodate apoprotein for the second reaction. The Lys(133) residue plays essential roles in both lipoate adenylation and lipoate transfer reactions. Based on structural and kinetic data, we propose a reaction mechanism driven by conformational changes.


    Organizational Affiliation

    Institute for Enzyme Research, University of Tokushima, Kuramotocho 3-chome, Tokushima 770-8503, Japan. fujiwara@ier.tokushima-u.ac.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glycine cleavage system H protein
A
128Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: gcvH
Find proteins for P0A6T9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6T9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.176 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 46.483α = 90.00
b = 52.037β = 93.05
c = 46.831γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-01-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance