1GK3

HISTIDINE AMMONIA-LYASE (HAL) MUTANT D145A FROM PSEUDOMONAS PUTIDA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.280 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Autocatalytic Peptide Cyclization During Chain Folding of Histidine Ammonia-Lyase.

Baedeker, M.Schulz, G.E.

(2002) Structure 10: 61

  • Primary Citation of Related Structures:  1EB4, 1GK2

  • PubMed Abstract: 
  • Histidine ammonia-lyase requires a 4-methylidene-imidazole-5-one group (MIO) that is produced autocatalytically by a cyclization and dehydration step in a 3-residue loop of the polypeptide. The crystal structures of three mutants have been establishe ...

    Histidine ammonia-lyase requires a 4-methylidene-imidazole-5-one group (MIO) that is produced autocatalytically by a cyclization and dehydration step in a 3-residue loop of the polypeptide. The crystal structures of three mutants have been established. Two mutants were inactive and failed to form MIO, but remained unchanged elsewhere. The third mutant showed very low activity and formed MIO, although it differed from an MIO-less mutant only by an additional 329-C(beta) atom. This atom forms one constraint during MIO formation, the other being the strongly connected Asp145. An exploration of the conformational space of the MIO-forming loop showed that the cyclization is probably enforced by a mechanic compression in a late stage of chain folding and is catalyzed by a well-connected internal water molecule. The cyclization of the respective 3-residue loop of green fluorescent protein is likely to occur in a similar reaction.


    Related Citations: 
    • Crystal Structure of Histidine Ammonia-Lyase Revealing a Novel Polypeptide Modification as the Catalytic Electrophile
      Schwede, T.F.,Retey, J.,Schulz, G.E.
      (1999) Biochemistry 38: 5355
    • Homogenization and Crystallization of Histidine Ammonia-Lyase by Exchange of a Surface Cysteine Residue
      Schwede, T.F.,Baedeker, M.,Langer, M.,Retey, J.,Schulz, G.E.
      (1999) Protein Eng. 12: 151


    Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, D-79104 Freiburg im Breisgau, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HISTIDINE AMMONIA-LYASE
A
509Pseudomonas putidaGene Names: hutH
EC: 4.3.1.3
Find proteins for P21310 (Pseudomonas putida)
Go to UniProtKB:  P21310
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.280 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 78.815α = 90.00
b = 117.105β = 90.00
c = 130.072γ = 90.00
Software Package:
Software NamePurpose
SHELXrefinement
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-02-21
    Type: Initial release
  • Version 1.1: 2011-09-07
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance