Photosystem II: Difference between revisions

From Proteopedia
Jump to navigationJump to search
No edit summary
No edit summary
Line 13: Line 13:


==Oxygen Evolution==
==Oxygen Evolution==
Another important facet of photosystem II is its ability to oxidize water to oxygen with its <scene name='Photosystem_II/Oxygen_evolving_centers/9'>oxygen evolving centers</scene>.  These <scene name='Photosystem_II/Oxygen_evolving_centers/3'>centers</scene> were shown to be cubane-like Mn<sub>3</sub>CaO<sub>4</sub>cluster linked to a fourth Mn by a mono-μ-oxo bridge. [1] Purple represents manganese, red represents oxygen and green is for calcium.  Oxidation of water to leaves 2 H <sup>+</sup> on the lumenal side of the membrane, helping to establish the proton gradient essential for ATP synthesis in the CF<sub>1</sub>CF<sub>0</sub>-ATP sythase protein.
Another important facet of photosystem II is its ability to oxidize water to oxygen with its <scene name='Photosystem_II/Oxygen_evolving_centers/9'>oxygen evolving centers</scene>.  These <scene name='Photosystem_II/Oxygen_evolving_centers/3'>centers</scene> were shown to be cubane-like Mn<sub>3</sub>CaO<sub>4</sub>cluster linked to a fourth Mn by a mono-μ-oxo bridge. <ref>{{cite journal |author=Ferreira, K.N., Iverson, T.M., Maghlaoui, K., Barber, J., Iwata, S. |title=Architecture of the photosynthetic oxygen-evolving center.|journal=Science|volume=303 |issue=5665 |pages=1831-8 |year=2004 |pmid=1096767}}</ref> Purple represents manganese, red represents oxygen and green is for calcium.  Oxidation of water to leaves 2 H <sup>+</sup> on the lumenal side of the membrane, helping to establish the proton gradient essential for ATP synthesis in the CF<sub>1</sub>CF<sub>0</sub>-ATP sythase protein.


==References==
==References==