Effects of amino acid residue substitutions on bicarbonate function in the plastoquinone reductase in cyanobacteria

The electron transfer at the Q$\sb{\rm A}$FeQ$\sb{\rm B}$ complex is significantly and reversibly inhibited in chloroplasts of higher plants and algae depleted of bicarbonate while no such inhibition has been observed in photosynthetic bacteria. It was observed in this study that a more than four fold stimulation of the Hill reaction by 5 mM bicarbonate and a significant reversible slowing of oxidation of Q$\sb{\rm A}\sp{-}$ in bicarbonate-depleted cells and thylakoids of Synechocystis sp. PCC 6803, showing the existence of the bicarbonate effect in cyanobacteria. Thus, this effect is present in all Photosystem II (PSII) reaction centers.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Biology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Cao, Jiancheng

Contributors dc:contributor

• Govindjee

• Biology, Molecular
• Biology, Microbiology

Statement dc:rights

• Copyright 1992 Cao, Jiancheng

Language dc:language

eng

Identifier

AAI9215782
(UMI)AAI9215782

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/22447