1RFT

Crystal structure of pyridoxal kinase complexed with AMP-PCP and pyridoxamine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Conformational changes in the reaction of pyridoxal kinase

Li, M.-H.Kwok, F.Chang, W.-R.Liu, S.-Q.Lo, S.C.L.Zhang, J.-P.Jiang, T.Liang, D.-C.

(2004) J Biol Chem 279: 17459-17465

  • DOI: 10.1074/jbc.M312380200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • To understand the processes involved in the catalytic mechanism of pyridoxal kinase (PLK),1 we determined the crystal structures of PLK.AMP-PCP-pyridoxamine, PLK.ADP.PLP, and PLK.ADP complexes. Comparisons of these structures have revealed that PLK e ...

    To understand the processes involved in the catalytic mechanism of pyridoxal kinase (PLK),1 we determined the crystal structures of PLK.AMP-PCP-pyridoxamine, PLK.ADP.PLP, and PLK.ADP complexes. Comparisons of these structures have revealed that PLK exhibits different conformations during its catalytic process. After the binding of AMP-PCP (an analogue that replaced ATP) and pyridoxamine to PLK, this enzyme retains a conformation similar to that of the PLK.ATP complex. The distance between the reacting groups of the two substrates is 5.8 A apart, indicating that the position of ATP is not favorable to spontaneous transfer of its phosphate group. However, the structure of PLK.ADP.PLP complex exhibited significant changes in both the conformation of the enzyme and the location of the ligands at the active site. Therefore, it appears that after binding of both substrates, the enzyme-substrate complex requires changes in the protein structure to enable the transfer of the phosphate group from ATP to vitamin B(6). Furthermore, a conformation of the enzyme-substrate complex before the transition state of the enzymatic reaction was also hypothesized.


    Related Citations: 
    • Crystal Structure of Brain Pyridoxal Kinase, a Novel Member of the Ribokinase Superfamily
      Li, M.-H., Kwok, F., Chang, W.-R., Lau, C.-K., Zhang, J.-P., Lo, S.C.L., Jiang, T., Liang, D.-C.
      (2002) J Biol Chem 277: 46385
    • Crystallization and preliminary crystallographic studies of pyridoxal kinase from sheep brain
      Li, M.-H., Kwok, F., An, X.-M., Chang, W.-R., Lau, C.-K., Zhang, J.-P., Liu, S.-Q., Leung, Y.-C., Jiang, T., Liang, D.-C.
      (2002) Acta Crystallogr D Biol Crystallogr 58: 1479

    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pyridoxal kinaseA312Ovis ariesMutation(s): 0 
Gene Names: PDXKPKH
EC: 2.7.1.35
Find proteins for P82197 (Ovis aries)
Explore P82197 
Go to UniProtKB:  P82197
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACP
Query on ACP

Download CCD File 
A
PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
 Ligand Interaction
PXM
Query on PXM

Download CCD File 
A
4-(AMINOMETHYL)-5-(HYDROXYMETHYL)-2-METHYLPYRIDIN-3-OL
C8 H12 N2 O2
NHZMQXZHNVQTQA-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
K
Query on K

Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.218 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.687α = 90
b = 103.687β = 90
c = 58.604γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-04-27
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance