6F8A

Crystal structure of cytochrome P450 CYP260A1 (S276I) bound with histidine

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Structure-Based Engineering of Steroidogenic CYP260A1 for Stereo- and Regioselective Hydroxylation of Progesterone.

Khatri, Y., Jozwik, I.K., Ringle, M., Ionescu, I.A., Litzenburger, M., Hutter, M.C., Thunnissen, A.W.H., Bernhardt, R.

(2018) ACS Chem Biol 13: 1021-1028

  • DOI: 10.1021/acschembio.8b00026
  • Primary Citation of Related Structures:  
    6F8A, 6F8C, 6F88, 6F85

  • PubMed Abstract: 

    • The production of regio- and stereoselectively hydroxylated steroids is of high pharmaceutical interest and can be achieved by cytochrome P450-based biocatalysts. CYP260A1 from Sorangium cellulosum strain So ce56 catalyzes hydroxylation of C19 or C21 ste ...

    The production of regio- and stereoselectively hydroxylated steroids is of high pharmaceutical interest and can be achieved by cytochrome P450-based biocatalysts. CYP260A1 from Sorangium cellulosum strain So ce56 catalyzes hydroxylation of C19 or C21 steroids at the very unique 1α-position. However, the conversion of progesterone (PROG) by CYP260A1 is very unselective. In order to improve its selectivity we applied a semirational protein engineering approach, resulting in two different, highly regio- and stereoselective mutants by replacing a single serine residue (S276) of the substrate recognition site 5 with an asparagine or isoleucine. The S276N mutant converted PROG predominantly into 1α-hydroxy-PROG, while the S276I mutant led to 17α-hydroxy-PROG. We solved the high-resolution crystal structures of the PROG-bound S276N and S276I mutants, which revealed two different binding modes of PROG in the active site. The orientations were consistent with the exclusive 1α- (pro-1α binding mode) and 17α-hydroxylation (pro-17α-binding mode) of S276N and S276I, respectively. We observed that water-mediated hydrogen bonds contribute to the stabilization of the polar C3 and C17 substituents of PROG. Both binding modes of PROG may be stabilized in the wild-type enzyme. The change in regioselectivity is mainly driven by destabilizing the alternative binding mode due to steric hindrance and hydrogen bond disruption, caused by the mutations of Ser276. Thus, for the first time, the change in the selectivity of cytochrome P450-mediated steroid hydroxylation created by rational mutagenesis can be explained by the obtained 3D structures of the substrate-bound mutants, providing the basis for further experiments to engineer the biocatalyst toward novel steroid hydroxylation positions.

    Organizational Affiliation: 

    Department of Biochemistry , Campus B2.2 , 66123 , Saarland University , Saarbrücken , Germany.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome P450 CYP260A1 A, B400Sorangium cellulosum So ce56Mutation(s): 1 
Gene Names: sce1588
EC: 1.14
Find proteins for A9FDB7 (Sorangium cellulosum (strain So ce56))
Explore A9FDB7 
Go to UniProtKB:  A9FDB7
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM
Download Ideal Coordinates CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L		 Ligand Interaction
HIS
Query on HIS
Download Ideal Coordinates CCD File 
A, B
HISTIDINE
C6 H10 N3 O2
HNDVDQJCIGZPNO-YFKPBYRVSA-O		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.221α = 90
b = 65.151β = 112.81
c = 128.533γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
EDNAdata collection
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

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View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyBE 1343/23-1/23-2
European CommissionNetherlands289217

Revision History 

  • Version 1.0: 2018-03-14
    Type: Initial release
  • Version 1.1: 2018-05-02
    Changes: Data collection, Database references