2Z3T

Crystal Structure of Substrate Free Cytochrome P450 StaP (CYP245A1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures and catalytic mechanism of cytochrome P450 StaP that produces the indolocarbazole skeleton

Makino, M.Sugimoto, H.Shiro, Y.Asamizu, S.Onaka, H.Nagano, S.

(2007) Proc.Natl.Acad.Sci.Usa 104: 11591-11596

  • DOI: 10.1073/pnas.0702946104
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Staurosporine isolated from Streptomyces sp. TP-A0274 is a member of the family of indolocarbazole alkaloids that exhibit strong antitumor activity. A key step in staurosporine biosynthesis is the formation of the indolocarbazole core by intramolecul ...

    Staurosporine isolated from Streptomyces sp. TP-A0274 is a member of the family of indolocarbazole alkaloids that exhibit strong antitumor activity. A key step in staurosporine biosynthesis is the formation of the indolocarbazole core by intramolecular C-C bond formation and oxidative decarboxylation of chromopyrrolic acid (CPA) catalyzed by cytochrome P450 StaP (StaP, CYP245A1). In this study, we report x-ray crystal structures of CPA-bound and -free forms of StaP. Upon substrate binding, StaP adopts a more ordered conformation, and conformational rearrangements of residues in the active site are also observed. Hydrogen-bonding interactions of two carboxyl groups and T-shaped pi-pi interactions with indole rings hold the substrate in the substrate-binding cavity with a conformation perpendicular to the heme plane. Based on the crystal structure of StaP-CPA complex, we propose that C-C bond formation occurs through an indole cation radical intermediate that is equivalent to cytochrome c peroxidase compound I [Sivaraja M, Goodin DB, Smith M, Hoffman BM (1989) Science 245:738-740]. The subsequent oxidative decarboxylation reaction is also discussed based on the crystal structure. Our crystallographic study shows the first crystal structures of enzymes involved in formation of the indolocarbazole core and provides valuable insights into the process of staurosporine biosynthesis, combinatorial biosynthesis of indolocarbazoles, and the diversity of cytochrome P450 chemistry.


    Organizational Affiliation

    Biometal Science Laboratory, RIKEN SPring-8 Center, Harima Institute, Hyogo 679-5148, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytochrome P450
A, B, C, D
425Streptomyces sp. TP-A0274Mutation(s): 0 
Gene Names: staP
Find proteins for Q83WG3 (Streptomyces sp. TP-A0274)
Go to UniProtKB:  Q83WG3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, B, C, D
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B, C, D
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
IMD
Query on IMD

Download SDF File 
Download CCD File 
A, B, C, D
IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.228 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 89.640α = 90.00
b = 78.718β = 107.92
c = 145.656γ = 90.00
Software Package:
Software NamePurpose
BSSdata collection
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-07-03
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance