Oxidation of the Non-Heme Iron Complex in Photosystem II†

Biochemistry ◽  
2005 ◽  
Vol 44 (45) ◽  
pp. 14772-14783 ◽  
Author(s):  
Hiroshi Ishikita ◽  
Ernst-Walter Knapp
Keyword(s):  
Photosystem Ii ◽  
Iron Complex ◽  
Heme Iron ◽  
Non Heme Iron

scholarly journals How to build a water-splitting machine: structural insights into photosystem II assembly

2020 ◽  
Author(s):  
Jure Zabret ◽  
Stefan Bohn ◽  
Sandra Schuller ◽  
Oliver Arnolds ◽  
Madeline Möller ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Water Splitting ◽  
Conformational Changes ◽  
Binding Pocket ◽  
Heme Iron ◽  
Structural Motif ◽  
Acceptor Side ◽  
Non Heme Iron ◽  
Assembly Intermediate ◽  
Stepwise Assembly

Abstract Biogenesis of photosystem II (PSII), nature’s water splitting catalyst, is assisted by auxiliary proteins that form transient complexes with PSII components to facilitate stepwise assembly events. Using cryo-electron microscopy, we solved the structure of such a PSII assembly intermediate with 2.94 Å resolution. It contains three assembly factors (Psb27, Psb28, Psb34) and provides detailed insights into their molecular function. Binding of Psb28 induces large conformational changes at the PSII acceptor side, which distort the binding pocket of the mobile quinone (QB) and replace bicarbonate with glutamate as a ligand of the non-heme iron, a structural motif found in reaction centers of non-oxygenic photosynthetic bacteria. These results reveal novel mechanisms that protect PSII from damage during biogenesis until water splitting is activated. Our structure further demonstrates how the PSII active site is prepared for the incorporation of the Mn4CaO5 cluster, which performs the unique water splitting reaction.

[FeIII(PMA)]2+:  A Mononuclear Non-Heme Iron Complex That Catalyzes Alkane Oxidation

1996 ◽  
Vol 35 (21) ◽  
pp. 6273-6281 ◽  
Author(s):  
Cattien Nguyen ◽  
Richard J. Guajardo ◽  
Pradip K. Mascharak
Keyword(s):  
Iron Complex ◽  
Heme Iron ◽  
Alkane Oxidation ◽  
Non Heme Iron

Synthesis, characterization, X-ray molecular structure and catalase-like activity of a non-heme iron complex: Dichloro[N-propanoate-N,N-bis-(2-pyridylmethyl)amine]iron(III)

2006 ◽  
Vol 359 (13) ◽  
pp. 4250-4258 ◽  
Author(s):  
Nakédia M.F. Carvalho ◽  
Adolfo Horn ◽  
Roberto B. Faria ◽  
Adailton J. Bortoluzzi ◽  
Valderes Drago ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Iron Complex ◽  
Heme Iron ◽  
X Ray ◽  
Non Heme Iron

Activation of dioxygen by a mononuclear non-heme iron complex: characterization of a FeIII(OOH) intermediate

2010 ◽  
Vol 39 (6) ◽  
pp. 1630-1634 ◽  
Author(s):  
Marlène Martinho ◽  
Guillaume Blain ◽  
Frédéric Banse
Keyword(s):  
Iron Complex ◽  
Heme Iron ◽  
Non Heme Iron ◽  
Complex Characterization
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