Abstract：
:The low molecular weight (LMW) heat shock protein (HSP), HSP16.6, in the unicellular cyanobacterium, Synechocystis sp. PCC 6803, protects cells from elevated temperatures. A 95% reduction in the survival of mutant cells with an inactivated hsp16.6 was observed after exposure for 1 h at 47 degrees C. Wild-type cell survival was reduced to only 41%. HSP16.6 is also involved in the development of thermotolerance. After a sublethal heat shock at 43 degrees C for 1 h and subsequent challenge exposure at 49 degrees C for 40 min, mutant cells did not survive, while 64% of wild-type cells survived. Ultrastructural changes in the integrity of thylakoid membranes of heat-shocked mutant cells also are discussed. These results demonstrate an important protective role for HSP16.6 in the protection of cells and, in particular, thylakoid membrane against thermal stress.
journal_name
Curr Microbioljournal_title
Current microbiologyauthors
Lee S,Owen HA,Prochaska DJ,Barnum SRdoi
10.1007/s002849910056keywords:
subject
Has Abstractpub_date
2000-04-01 00:00:00pages
283-7issue
4eissn
0343-8651issn
1432-0991pii
10.1007/s002849910056journal_volume
40pub_type
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