scholarly journals The Cytochrome b6f Complex Is Not Involved in Cyanobacterial State Transitions

2019 ◽  
Vol 31 (4) ◽  
pp. 911-931 ◽  
Author(s):  
Pablo I. Calzadilla ◽  
Jiao Zhan ◽  
Pierre Sétif ◽  
Claire Lemaire ◽  
Daniel Solymosi ◽  
...  
Keyword(s):  
State Transitions ◽  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex

scholarly journals Electron transfer via cytochrome b6f complex displays sensitivity to Antimycin A upon STT7 kinase activation.

2022 ◽  
Author(s):  
Felix Buchert ◽  
Martin Scholz ◽  
Michael Hippler
Keyword(s):  
Electron Transfer ◽  
Electron Flow ◽  
Anaerobic Treatment ◽  
State Transitions ◽  
Antimycin A ◽  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
Q Cycle ◽  
B6f Complex

The cytochrome b6f complex (b6f) has been initially considered as the ferredoxin-plastoquinone reductase (FQR) during cyclic electron flow (CEF) with photosystem I that is inhibited by antimycin A (AA). The binding of AA to the b6f Qi-site is aggravated by heme-ci, which challenged the FQR function of b6f during CEF. Alternative models suggest that PROTON GRADIENT REGULATION5 (PGR5) is involved in a b6f-independent, AA-sensitive FQR. Here, we show in Chlamydomonas reinhardtii that the b6f is conditionally inhibited by AA in vivo and that the inhibition did not require PGR5. Instead, activation of the STT7 kinase upon anaerobic treatment induced the AA sensitivity of b6f which was absent in stt7-1. However, a lock in State 2 due to persisting phosphorylation in the phosphatase double mutant pph1;pbcp did not increase AA sensitivity of electron transfer. The latter required a redox poise, supporting the view that state transitions and CEF are not coercively coupled. This suggests that the b6f-interacting kinase is required for structure-function modulation of the Qi-site under CEF favoring conditions. We propose that PGR5 and STT7 independently sustain AA-sensitive FQR activity of the b6f. Accordingly, PGR5-mediated electron injection into an STT7-modulated Qi-site drives a Mitchellian Q cycle in CEF conditions.

The cytochrome b6f complex. Novel aspects

1997 ◽  
Vol 100 (4) ◽  
pp. 852-862 ◽  
Author(s):  
William A. Cramer ◽  
Glenda M. Soriano ◽  
Huamin Zhang ◽  
Michael V. Ponamarev ◽  
Janet L. Smith
Keyword(s):  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex

Structure of the cytochrome b6f complex: new prosthetic groups, Q-space, and the ‘hors d’oeuvres hypothesis’ for assembly of the complex

2005 ◽  
Vol 85 (1) ◽  
pp. 133-143 ◽  
Author(s):  
William A. Cramer ◽  
Jiusheng Yan ◽  
Huamin Zhang ◽  
Genji Kurisu ◽  
Janet L. Smith
Keyword(s):  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
Prosthetic Groups ◽  
B6f Complex

An atypical haem in the cytochrome b6f complex

Nature ◽  
2003 ◽  
Vol 426 (6965) ◽  
pp. 413-418 ◽  
Author(s):  
David Stroebel ◽  
Yves Choquet ◽  
Jean-Luc Popot ◽  
Daniel Picot
Keyword(s):  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex

scholarly journals HCF164 Encodes a Thioredoxin-Like Protein Involved in the Biogenesis of the Cytochrome b6f Complex in Arabidopsis

2001 ◽  
Vol 13 (11) ◽  
pp. 2539-2551 ◽  
Author(s):  
Katja Lennartz ◽  
Henning Plücken ◽  
Andreas Seidler ◽  
Peter Westhoff ◽  
Nicole Bechtold ◽  
...  
Keyword(s):  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex

Cytochrome b6f Complex

2004 ◽  
pp. 521-527 ◽  
Author(s):  
Günter A. Hauska ◽  
Thomas Schödl
Keyword(s):  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex

scholarly journals Electrostatic destabilization of the cytochrome b6f complex in the thylakoid membrane.

1991 ◽  
Vol 10 (10) ◽  
pp. 2757-2764 ◽  
Author(s):  
A. Szczepaniak ◽  
D. Huang ◽  
T.W. Keenan ◽  
W.A. Cramer
Keyword(s):  
Thylakoid Membrane ◽  
Cytochrome B6f Complex ◽  
Cytochrome B6f ◽  
B6f Complex
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