6nef

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Outer Membrane Cytochrome S Filament from Geobacter Sulfurreducens

Structural highlights

6nef is a 1 chain structure with sequence from Geobacter sulfurreducens PCA. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Electron Microscopy, Resolution 3.4Å
Ligands:HEC, MG
Experimental data:Check to display Experimental Data
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

OMCS_GEOSL Plays an important role in extracellular electron transfer. Can transfer electrons to insoluble Fe(3+) oxides as well as other extracellular electron acceptors, including Mn(4+) oxide and humic substances (PubMed:16332857, PubMed:20400557, PubMed:21236241). Essential for direct interspecies electron transfer (DIET) in cocultures with G. metallireducens (PubMed:23377933).[1] [2] [3] [4]

Publication Abstract from PubMed

Electrically conductive pili from Geobacter 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 G. sulfurreducens 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 A resolution, the structure of this cytochrome-based filament and discuss its possible role in long-range biological electron transport.

Cryo-EM reveals the structural basis of long-range electron transport in a cytochrome-based bacterial nanowire.,Filman DJ, Marino SF, Ward JE, Yang L, Mester Z, Bullitt E, Lovley DR, Strauss M Commun Biol. 2019 Jun 19;2:219. doi: 10.1038/s42003-019-0448-9. eCollection 2019. PMID:31240257[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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References

  1. ↑ Mehta T, Coppi MV, Childers SE, Lovley DR. Outer membrane c-type cytochromes required for Fe(III) and Mn(IV) oxide reduction in Geobacter sulfurreducens. Appl Environ Microbiol. 2005 Dec;71(12):8634-41. doi:, 10.1128/AEM.71.12.8634-8641.2005. PMID:16332857 doi:http://dx.doi.org/10.1128/AEM.71.12.8634-8641.2005
  2. ↑ Leang C, Qian X, Mester T, Lovley DR. Alignment of the c-type cytochrome OmcS along pili of Geobacter sulfurreducens. Appl Environ Microbiol. 2010 Jun;76(12):4080-4. doi: 10.1128/AEM.00023-10. Epub, 2010 Apr 16. PMID:20400557 doi:http://dx.doi.org/10.1128/AEM.00023-10
  3. ↑ Qian X, Mester T, Morgado L, Arakawa T, Sharma ML, Inoue K, Joseph C, Salgueiro CA, Maroney MJ, Lovley DR. Biochemical characterization of purified OmcS, a c-type cytochrome required for insoluble Fe(III) reduction in Geobacter sulfurreducens. Biochim Biophys Acta. 2011 Apr;1807(4):404-12. doi: 10.1016/j.bbabio.2011.01.003., Epub 2011 Jan 12. PMID:21236241 doi:http://dx.doi.org/10.1016/j.bbabio.2011.01.003
  4. ↑ Shrestha PM, Rotaru AE, Summers ZM, Shrestha M, Liu F, Lovley DR. Transcriptomic and genetic analysis of direct interspecies electron transfer. Appl Environ Microbiol. 2013 Apr;79(7):2397-404. doi: 10.1128/AEM.03837-12. Epub , 2013 Feb 1. PMID:23377933 doi:http://dx.doi.org/10.1128/AEM.03837-12
  5. ↑ Filman DJ, Marino SF, Ward JE, Yang L, Mester Z, Bullitt E, Lovley DR, Strauss M. Cryo-EM reveals the structural basis of long-range electron transport in a cytochrome-based bacterial nanowire. Commun Biol. 2019 Jun 19;2:219. doi: 10.1038/s42003-019-0448-9. eCollection 2019. PMID:31240257 doi:http://dx.doi.org/10.1038/s42003-019-0448-9

Contents


6nef, resolution 3.40Å

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OCA

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