Abstract:
:The expression of the cytM gene, which encodes cytochrome cM in Synechocystis sp. PCC 6803, is induced under stress conditions such as low temperature. Results of spectrophotometric studies revealed that cytochrome cM was oxidized by light absorbed by photosystem I in cells that had acclimatized to a low temperature. However, no similar light-induced oxidation of cytochrome cM was observed in delta cytM mutant cells. The kinetics of the oxidation and reduction of P700 before and after acclimation of Synechocystis cells to low temperature suggested that cytochrome cM might donate electrons to photooxidized P700. Our observations indicate that cytochrome cM is synthesized under low-temperature stress and that it might carry electrons directly to P700+ in photosystem I.
journal_name
IUBMB Lifejournal_title
IUBMB lifeauthors
Shuvalov VA,Allakhverdiev SI,Sakamoto A,Malakhov M,Murata Ndoi
10.1080/15216540118716keywords:
subject
Has Abstractpub_date
2001-02-01 00:00:00pages
93-7issue
2eissn
1521-6543issn
1521-6551journal_volume
51pub_type
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