Abstract:
:Pathways formed of delocalized π-electron systems and polar groups of polypeptide chains bridged by hydrogen bonds are referred as π-H pathways. Suitable for electron transfer, these pathways in cytochrome c oxidase connect CuA, the source of electrons distributed in cytochrome c oxidase, with the metal centers, heme a, heme a3, CuB, the constituents of the catalytic binuclear center. The unusually rapid electron transfer between heme a and heme a3 would have been facilitated by the link pathway of a long sequence of alternate peptide unit and hydrogen bond spanning Pro336-Val374, referred as suprahelix, between these hemes. Two pathways between CuA center and zinc center, share some portions with purported proton-translocating channels, designated "K" and "D".
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ramasarma T,Vaigundan Ddoi
10.1016/j.bbrc.2019.01.083subject
Has Abstractpub_date
2019-03-05 00:00:00pages
261-265issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(19)30105-6journal_volume
510pub_type
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