Matches in SemOpenAlex for { <https://semopenalex.org/work/W2016144917> ?p ?o ?g. }
- W2016144917 endingPage "12864" @default.
- W2016144917 startingPage "12857" @default.
- W2016144917 abstract "In this report, we analyze and interpret single-molecule current-voltage (I-V) tunneling spectra collected for two decaheme c-type cytochromes using a scanning tunneling microscope. The cytochromes (OmcA and MtrC) are outer-membrane proteins from the metal-reducing bacterium Shewanella oneidensis and function as metal-reducing enzymes. Although the two cytochromes are similar in heme count, charge-carrying amino acid content, and molecular mass, their I-V spectra are significantly different. The I-V spectra for OmcA show smoothly varying symmetric exponential behavior. These spectra are well fit by a coherent tunneling model that is based on a simple square barrier description of the tunneling junction. In contrast, the I-V spectra for MtrC have significant breaks in slope in the positive tip bias range. Two large peaks in the normalized differential conductance spectra of MtrC were fit to a tunneling model that accounts for the possibility of transient population of empty states stabilized by vibrational relaxation. Reorganization energies deduced for the two features are similar to those normally assigned to metal centers in other metalloproteins. Work function measurements of the cytochrome films were used to convert the energies of these two spectral features to the normal hydrogen electrode (NHE) scale for comparison with the redox potential domain previously measured by protein film voltammetry, which showed good correspondence. We conclude that MtrC mediates tunneling current by discretely resolved heme orbital participation at -81 and -365 mV versus NHE. The difference in tunneling behavior between OmcA and MtrC suggests distinct physiological functions for the two cytochromes; in contrast to OmcA, MtrC appears to be tuned to a specific operating potential." @default.
- W2016144917 created "2016-06-24" @default.
- W2016144917 creator A5042500517 @default.
- W2016144917 creator A5088380075 @default.
- W2016144917 creator A5091220056 @default.
- W2016144917 date "2007-10-16" @default.
- W2016144917 modified "2023-10-14" @default.
- W2016144917 title "Mechanisms of Electron Transfer in Two Decaheme Cytochromes from a Metal-Reducing Bacterium" @default.
- W2016144917 cites W1963775713 @default.
- W2016144917 cites W1963865435 @default.
- W2016144917 cites W1966381981 @default.
- W2016144917 cites W1967964348 @default.
- W2016144917 cites W1972711039 @default.
- W2016144917 cites W1973282880 @default.
- W2016144917 cites W1974015326 @default.
- W2016144917 cites W1975799717 @default.
- W2016144917 cites W1977336508 @default.
- W2016144917 cites W1977433713 @default.
- W2016144917 cites W1980042091 @default.
- W2016144917 cites W1987729396 @default.
- W2016144917 cites W1992126485 @default.
- W2016144917 cites W1993392527 @default.
- W2016144917 cites W2000029554 @default.
- W2016144917 cites W2001098953 @default.
- W2016144917 cites W2001270915 @default.
- W2016144917 cites W2006028467 @default.
- W2016144917 cites W2007882752 @default.
- W2016144917 cites W2009146799 @default.
- W2016144917 cites W2010741315 @default.
- W2016144917 cites W2015134397 @default.
- W2016144917 cites W2015723213 @default.
- W2016144917 cites W2016085565 @default.
- W2016144917 cites W2021856457 @default.
- W2016144917 cites W2024296055 @default.
- W2016144917 cites W2025606110 @default.
- W2016144917 cites W2026488766 @default.
- W2016144917 cites W2028435853 @default.
- W2016144917 cites W2029533128 @default.
- W2016144917 cites W2031904472 @default.
- W2016144917 cites W2032171922 @default.
- W2016144917 cites W2035042392 @default.
- W2016144917 cites W2036611267 @default.
- W2016144917 cites W2038323579 @default.
- W2016144917 cites W2038596391 @default.
- W2016144917 cites W2039627190 @default.
- W2016144917 cites W2044058641 @default.
- W2016144917 cites W2044990980 @default.
- W2016144917 cites W2045769743 @default.
- W2016144917 cites W2046915036 @default.
- W2016144917 cites W2050219672 @default.
- W2016144917 cites W2052837730 @default.
- W2016144917 cites W2057970211 @default.
- W2016144917 cites W2059642862 @default.
- W2016144917 cites W2059676982 @default.
- W2016144917 cites W2060267239 @default.
- W2016144917 cites W2064423503 @default.
- W2016144917 cites W2065302239 @default.
- W2016144917 cites W2068187405 @default.
- W2016144917 cites W2072162719 @default.
- W2016144917 cites W2072448795 @default.
- W2016144917 cites W2075365230 @default.
- W2016144917 cites W2075603064 @default.
- W2016144917 cites W2078307013 @default.
- W2016144917 cites W2078630544 @default.
- W2016144917 cites W2080659521 @default.
- W2016144917 cites W2081066386 @default.
- W2016144917 cites W2081886636 @default.
- W2016144917 cites W2088050330 @default.
- W2016144917 cites W2088098146 @default.
- W2016144917 cites W2089892003 @default.
- W2016144917 cites W2092951025 @default.
- W2016144917 cites W2094182713 @default.
- W2016144917 cites W2095216354 @default.
- W2016144917 cites W2098954147 @default.
- W2016144917 cites W2101055410 @default.
- W2016144917 cites W2105084149 @default.
- W2016144917 cites W2106293973 @default.
- W2016144917 cites W2106960391 @default.
- W2016144917 cites W2107619830 @default.
- W2016144917 cites W2109606373 @default.
- W2016144917 cites W2111318809 @default.
- W2016144917 cites W2114692337 @default.
- W2016144917 cites W2129202245 @default.
- W2016144917 cites W2133266834 @default.
- W2016144917 cites W2137723230 @default.
- W2016144917 cites W2142059002 @default.
- W2016144917 cites W2144465161 @default.
- W2016144917 cites W2152850496 @default.
- W2016144917 cites W2154835275 @default.
- W2016144917 cites W2163173838 @default.
- W2016144917 cites W2196925202 @default.
- W2016144917 cites W2491965623 @default.
- W2016144917 cites W2949751215 @default.
- W2016144917 cites W4230092830 @default.
- W2016144917 doi "https://doi.org/10.1021/jp0718698" @default.
- W2016144917 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17939701" @default.
- W2016144917 hasPublicationYear "2007" @default.
- W2016144917 type Work @default.