1LTU

CRYSTAL STRUCTURE OF CHROMOBACTERIUM VIOLACEUM, APO (NO IRON BOUND) STRUCTURE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural comparison of bacterial and human iron-dependent phenylalanine hydroxylases: similar fold, different stability and reaction rates.

Erlandsen, H.Kim, J.Y.Patch, M.G.Han, A.Volner, A.Abu-Omar, M.M.Stevens, R.C.

(2002) J.Mol.Biol. 320: 645-661

  • Primary Citation of Related Structures:  1LTV, 1LTZ

  • PubMed Abstract: 
  • Structure determination of bacterial homologues of human disease-related proteins provides an efficient path to understanding the three-dimensional fold of proteins that are associated with human diseases. However, the precise locations of active-sit ...

    Structure determination of bacterial homologues of human disease-related proteins provides an efficient path to understanding the three-dimensional fold of proteins that are associated with human diseases. However, the precise locations of active-site residues are often quite different between bacterial and human versions of an enzyme, creating significant differences in the biological understanding of enzyme homologs. To study this hypothesis, phenylalanine hydroxylase from a bacterial source has been structurally characterized at high resolution and comparison is made to the human analog. The enzyme phenylalanine hydroxylase (PheOH) catalyzes the hydroxylation of l-phenylalanine into l-tyrosine utilizing the cofactors (6R)-l-erythro-5,6,7,8 tetrahydrobiopterin (BH(4)) and molecular oxygen. Previously determined X-ray structures of human and rat PheOH, with a sequence identity of more than 93%, show that these two structures are practically identical. It is thus of interest to compare the structure of the divergent Chromobacterium violaceum phenylalanine hydroxylase (CvPheOH) ( approximately 24% sequence identity overall) to the related human and rat PheOH structures. We have determined crystal structures of CvPheOH to high resolution in the apo-form (no Fe-added), Fe(III)-bound form, and 7,8-dihydro-l-biopterin (7,8-BH(2)) plus Fe(III)-bound form. The bacterial enzyme displays higher activity and thermal melting temperature, and structurally, differences are observed in the N and C termini, and in a loop close to the active-site iron atom.


    Organizational Affiliation

    The Scripps Research Institute, Department of Molecular Biology, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHENYLALANINE-4-HYDROXYLASE
A
297Chromobacterium violaceum (strain ATCC 12472 / DSM 30191 / JCM 1249 / NBRC 12614 / NCIMB 9131 / NCTC 9757)Gene Names: phhA
EC: 1.14.16.1
Find proteins for P30967 (Chromobacterium violaceum (strain ATCC 12472 / DSM 30191 / JCM 1249 / NBRC 12614 / NCIMB 9131 / NCTC 9757))
Go to UniProtKB:  P30967
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.684α = 90.00
b = 68.011β = 90.00
c = 90.989γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-07-17
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance