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Crystal Structure of Hemoprotein Domain of P450BM-3, a Prototype for Microsomal P450's

Ravichandran, Kurumbail G., Boddupalli, Sekhar S., Hasermann, Charles A., Peterson, Julian A., Deisenhofer, Johann·1993·Science

Abstract

Cytochrome P450BM-3, a bacterial fatty acid monooxygenase, resembles the eukaryotic microsomal P450's and their flavoprotein reductase in primary structure and function. The three-dimensional structure of the hemoprotein domain of P450BM-3 was determined by x-ray diffraction and refined to an R factor of 16.9 percent at 2.0 angstrom resolution. The structure consists of an α and a β domain. The active site heme is accessible through a long hydrophobic channel formed primarily by the β domain and the B′ and F helices of the α domain. The two molecules in the asymmetric unit differ in conformation around the substrate binding pocket. Substantial differences between P450BM-3 and P450cam, the only other P450 structure available, are observed around the substrate binding pocket and the regions important for redox partner binding. A general mechanism for proton transfer in P450's is also proposed.

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Metadata

Authors
Ravichandran, K. G., Boddupalli, S. S., Hasermann, C. A., Peterson, J. A., & Deisenhofer, J.
Venue
Science
Published
1993-08-06
Volume
261
Issue
5122
Pages
731-736
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2000051743
Cited by
877
References
3
FWCI
47.34
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Crystal Structure of Hemoprotein Domain of P450BM-3, a Prototype for Microsomal P450's. https://app.cochat.ai/papers/10.1126/science.8342039
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Ravichandran, K. G., Boddupalli, S. S., Hasermann, C. A., Peterson, J. A., & Deisenhofer, J. (1993). Crystal Structure of Hemoprotein Domain of P450BM-3, a Prototype for Microsomal P450's. Science. https://doi.org/10.1126/science.8342039

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