Structure of T4moF, the Toluene 4-Monooxygenase Ferredoxin Oxidoreductase
Abstract
The 1.6 Å crystal structure of toluene 4-monooxygenase reductase T4moF is reported. The structure includes ferredoxin, flavin, and NADH binding domains. Here, the position of the ferredoxin domain relative to the other two domains represents a new configuration for the iron–sulfur flavoprotein family. Close contacts between the C8 methyl group of FAD and [2Fe-2S] ligand Cys36-O represent a plausible pathway for electron transfer between the redox cofactors. Energy-minimized docking of NADH and calculation of hingelike motions between domains suggest how simple coordinated shifts of residues at the C-terminus of the enzyme could expose the N5 position of FAD for productive interaction with the nicotinamide ring. The domain configuration revealed by the T4moF structure provides an excellent steric and electrostatic match to the obligate electron acceptor, Rieske-type [2Fe-2S] ferredoxin T4moC. Protein–protein docking and energy minimization of the T4moFC complex indicate that T4moF [2Fe-2S] ligand Cys41 and T4moC [2Fe-2S] ligand His67, along with other electrostatic interactions between the protein partners, form the functional electron transfer interface.
- Authors:
-
- Univ. of Wisconsin, Madison, WI (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1497148
- Grant/Contract Number:
- W-31-109-ENG-38; MCB-0843239
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Biochemistry
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 38; Journal ID: ISSN 0006-2960
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; charge transfer; peptides and proteins; crystal structure; chemical structure
Citation Formats
Acheson, Justin F., Moseson, Hannah, and Fox, Brian G. Structure of T4moF, the Toluene 4-Monooxygenase Ferredoxin Oxidoreductase. United States: N. p., 2015.
Web. doi:10.1021/acs.biochem.5b00692.
Acheson, Justin F., Moseson, Hannah, & Fox, Brian G. Structure of T4moF, the Toluene 4-Monooxygenase Ferredoxin Oxidoreductase. United States. https://doi.org/10.1021/acs.biochem.5b00692
Acheson, Justin F., Moseson, Hannah, and Fox, Brian G. Wed .
"Structure of T4moF, the Toluene 4-Monooxygenase Ferredoxin Oxidoreductase". United States. https://doi.org/10.1021/acs.biochem.5b00692. https://www.osti.gov/servlets/purl/1497148.
@article{osti_1497148,
title = {Structure of T4moF, the Toluene 4-Monooxygenase Ferredoxin Oxidoreductase},
author = {Acheson, Justin F. and Moseson, Hannah and Fox, Brian G.},
abstractNote = {The 1.6 Å crystal structure of toluene 4-monooxygenase reductase T4moF is reported. The structure includes ferredoxin, flavin, and NADH binding domains. Here, the position of the ferredoxin domain relative to the other two domains represents a new configuration for the iron–sulfur flavoprotein family. Close contacts between the C8 methyl group of FAD and [2Fe-2S] ligand Cys36-O represent a plausible pathway for electron transfer between the redox cofactors. Energy-minimized docking of NADH and calculation of hingelike motions between domains suggest how simple coordinated shifts of residues at the C-terminus of the enzyme could expose the N5 position of FAD for productive interaction with the nicotinamide ring. The domain configuration revealed by the T4moF structure provides an excellent steric and electrostatic match to the obligate electron acceptor, Rieske-type [2Fe-2S] ferredoxin T4moC. Protein–protein docking and energy minimization of the T4moFC complex indicate that T4moF [2Fe-2S] ligand Cys41 and T4moC [2Fe-2S] ligand His67, along with other electrostatic interactions between the protein partners, form the functional electron transfer interface.},
doi = {10.1021/acs.biochem.5b00692},
journal = {Biochemistry},
number = 38,
volume = 54,
place = {United States},
year = {Wed Aug 26 00:00:00 EDT 2015},
month = {Wed Aug 26 00:00:00 EDT 2015}
}
Web of Science
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