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TitleCryo-EM reveals the structural basis of long-range electron transport in a cytochrome-based bacterial nanowire.
Journal, issue, pagesCommun Biol, Vol. 2, Page 219, Year 2019
Publish dateJun 19, 2019
AuthorsDavid J Filman / Stephen F Marino / Joy E Ward / Lu Yang / Zoltán Mester / Esther Bullitt / Derek R Lovley / Mike Strauss /
PubMed AbstractElectrically conductive pili from species, termed bacterial nanowires, are intensely studied for their biological significance and potential in the development of new materials. Using cryo-electron ...Electrically conductive pili from species, termed bacterial nanowires, are intensely studied for their biological significance and potential in the development of new materials. Using cryo-electron microscopy, we have characterized nanowires from conductive pili preparations that are composed solely of head-to-tail stacked monomers of the six-heme C-type cytochrome OmcS. The unique fold of OmcS - closely wrapped around a continuous stack of hemes that can serve as an uninterrupted path for electron transport - generates a scaffold that supports the unbranched chain of hemes along the central axis of the filament. We present here, at 3.4 Å resolution, the structure of this cytochrome-based filament and discuss its possible role in long-range biological electron transport.
External linksCommun Biol / PubMed:31240257 / PubMed Central
MethodsEM (helical sym.)
Resolution3.4 Å
Structure data

9357

6nef

EMDB-9357, PDB-6nef:
Outer Membrane Cytochrome S Filament from Geobacter Sulfurreducens
Method: EM (helical sym.) / Resolution: 3.4 Å

Chemicals

ChemComp-HEC:
HEME C

ChemComp-MG:
Unknown entry

Source
  • Geobacter sulfurreducens (bacteria)
  • geobacter sulfurreducens (strain atcc 51573 / dsm 12127 / pca) (bacteria)
KeywordsPROTEIN FIBRIL / Conductive / filament / nanowire / SIX-HEME MULTIHEME C-TYPE CYTOCHROME

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