Cytochrome P₄₅₀

PDB file 2BMH

Structure of the hemoprotein domain of cytochrome P₄₅₀ from Bacillus magaterium, solved by H. Li & T. L. Poulos in 1994.

Suggested display options:

To distinguish the 2 copies of the enzyme, color chain.

Select hetero-ligand, display as spacefill or ball & stick, with color CPK. 
Zoom in close to view the heme structure.

To see the cysteine axial ligand, use the command line to select cys400, and display as spacefill with color CPK.

In many P₄₅₀ enzymes a water oxygen occupies the other axial ligand position, and is displaced when O₂ binds.
Find out whether a water molecule is coordinated to the heme iron in this case.

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