Edwards, Marcus J, Baiden, Nanakow, Johs, Alexander, Tomanicek, Stephen J, Liang, Liyuan, Shi, Liang, Fredrickson, Jim K, Zachara, John M, Gates, Andrew J ORCID: https://orcid.org/0000-0002-4594-5038, Butt, Julea N
ORCID: https://orcid.org/0000-0002-9624-5226, Richardson, David J
ORCID: https://orcid.org/0000-0002-6847-1832 and Clarke, Thomas A
ORCID: https://orcid.org/0000-0002-6234-1914
(2014)
The X-ray crystal structure of Shewanella oneidensis OmcA reveals new insight at the microbe-mineral interface.
FEBS Letters, 588 (10).
pp. 1886-1890.
ISSN 0014-5793
Abstract
The X-ray crystal structure of Shewanella oneidensis OmcA, an extracellular decaheme cytochrome involved in mineral reduction, was solved to a resolution of 2.7 Å. The four OmcA molecules in the asymmetric unit are arranged so the minimum distance between heme 5 on adjacent OmcA monomers is 9 Å, indicative of a transient OmcA dimer capable of intermolecular electron transfer. A previously identified hematite binding motif was identified near heme 10, forming a hydroxylated surface that would bring a heme 10 electron egress site to ∼ 10 Å of a mineral surface.
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