کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1943666 | 1052678 | 2006 | 12 صفحه PDF | دانلود رایگان |

Respiratory heme-copper oxidases are integral membrane proteins that catalyze the reduction of molecular oxygen to water using electrons donated by either quinol (quinol oxidases) or cytochrome c (cytochrome c oxidases, CcOs). Even though the X-ray crystal structures of several heme-copper oxidases and results from functional studies have provided significant insights into the mechanisms of O2-reduction and, electron and proton transfer, the design of the proton-pumping machinery is not known. Here, we summarize the current knowledge on the identity of the structural elements involved in proton transfer in CcO. Furthermore, we discuss the order and timing of electron-transfer reactions in CcO during O2 reduction and how these reactions might be energetically coupled to proton pumping across the membrane.
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1757, Issue 8, August 2006, Pages 1052–1063