Determination of Ligand Pathways in Globins: Apolar Tunnels Versus Polar Gates

Background: O2 pathways in animal hemoglobins and myoglobins are controversial. Results: Ligands enter and exit sperm whale Mb and Cerebratulus lacteus Hb by completely different pathways. Conclusion: Rational mutagenesis mapping can identify ligand migration pathways and provides experimental bench...

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Bibliographic Details
Published in:Journal of Biological Chemistry
Main Authors: Salter, Mallory D., Blouin, George C., Soman, Jayashree, Singleton, Eileen W., Dewilde, Sylvia, Moens, Luc, Pesce, Alessandra, Nardini, Marco, Bolognesi, Martino, Olson, John S.
Format: Article in Journal/Newspaper
Language:English
Published: The American Society for Biochemistry and Molecular Biology, Inc. 2012
Subjects:
Sperm whale
Online Access:https://hdl.handle.net/1911/70807
https://doi.org/10.1074/jbc.M112.392258
Description
Summary:Background: O2 pathways in animal hemoglobins and myoglobins are controversial. Results: Ligands enter and exit sperm whale Mb and Cerebratulus lacteus Hb by completely different pathways. Conclusion: Rational mutagenesis mapping can identify ligand migration pathways and provides experimental benchmarks for testing molecular dynamics simulations. Significance: Globins can use either a polar gate or an apolar tunnel for ligand entry.

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