1H7P

SCHIFF-BASE COMPLEX OF YEAST 5-AMINOLAEVULINIC ACID DEHYDRATASE WITH 4-KETO-5-AMINO-HEXANOIC (KAH) AT 1.64 A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.64 Å
  • R-Value Free: 0.301 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The X-Ray Structure of Yeast 5-Aminolaevulinic Acid Dehydratase Complexed with Substrate and Three Inhibitors

Erskine, P.T.Newbold, R.Brindley, A.A.Wood, S.P.Shoolingin-Jordan, P.M.Warren, M.J.Cooper, J.B.

(2001) J.Mol.Biol. 312: 133

  • DOI: 10.1006/jmbi.2001.4947
  • Primary Citation of Related Structures:  1H7N, 1H7O, 1H7R

  • PubMed Abstract: 
  • The structures of 5-aminolaevulinic acid dehydratase (ALAD) complexed with substrate (5-aminolaevulinic acid) and three inhibitors: laevulinic acid, succinylacetone and 4-keto-5-aminolaevulinic acid, have been solved at high resolution. The ligands a ...

    The structures of 5-aminolaevulinic acid dehydratase (ALAD) complexed with substrate (5-aminolaevulinic acid) and three inhibitors: laevulinic acid, succinylacetone and 4-keto-5-aminolaevulinic acid, have been solved at high resolution. The ligands all bind by forming a covalent link with Lys263 at the active site. The structures define the interactions made by one of the two substrate moieties that bind to the enzyme during catalysis. All of the inhibitors induce a significant ordering of the flap covering the active site. Succinylacetone appears to be unique by inducing a number of conformational changes in loops covering the active site, which may be important for understanding the co-operative properties of ALAD enzymes. Succinylacetone is produced in large amounts by patients suffering from the hereditary disease type I tyrosinaemia and its potent inhibition of ALAD also has implications for the pathology of this disease. The most intriguing result is that obtained with 4-keto-5-amino-hexanoic acid, which seems to form a stable carbinolamine intermediate with Lys263. It appears that we have defined the structure of an intermediate of Schiff base formation that the substrate forms upon binding to the P-site of the enzyme.


    Organizational Affiliation

    Division of Biochemistry and Molecular Biology, School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton SO16 7PX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
5-AMINOLAEVULINIC ACID DEHYDRATASE
A
342Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: HEM2
EC: 4.2.1.24
Find proteins for P05373 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P05373
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KAH
Query on KAH

Download SDF File 
Download CCD File 
A
5-AMINO-4-HYDROXYHEXANOIC ACID
4-KETO-5-AMINO-HEXANOIC ACID
C6 H13 N O3
LUMVYMITQCJEGS-RFZPGFLSSA-N
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.64 Å
  • R-Value Free: 0.301 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 104.300α = 90.00
b = 104.300β = 90.00
c = 167.800γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
SHELXrefinement
CCP4phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-07-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance