Temperature-independent and -dependent expression of desaturase genes in filamentous cyanobacterium Spirulina platensis strain C1 (Arthrospira sp. PCC 9438)

Abstract The alteration of the degree of unsaturated fatty acids in membrane lipids has been shown to be a key mechanism in the tolerance to temperature stress of living organisms. The step that most influences the physiology of membranes has been proposed to be the amount of di-unsaturated fatty ac...

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Veröffentlicht in:FEMS microbiology letters 2000-03, Vol.184 (2), p.207-213
Hauptverfasser: Deshnium, Patcharaporn, Paithoonrangsarid, Kalyanee, Suphatrakul, Amporn, Meesapyodsuk, Dauenpen, Tanticharoen, Morakot, Cheevadhanarak, Supapon
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container_end_page 213
container_issue 2
container_start_page 207
container_title FEMS microbiology letters
container_volume 184
creator Deshnium, Patcharaporn
Paithoonrangsarid, Kalyanee
Suphatrakul, Amporn
Meesapyodsuk, Dauenpen
Tanticharoen, Morakot
Cheevadhanarak, Supapon
description Abstract The alteration of the degree of unsaturated fatty acids in membrane lipids has been shown to be a key mechanism in the tolerance to temperature stress of living organisms. The step that most influences the physiology of membranes has been proposed to be the amount of di-unsaturated fatty acids in membrane lipids. In this study, we found that the desaturation of fatty acid to yield the di-unsaturated fatty acid 18:2(9,12), in Spirulina platensis strain C1, was not regulated by temperature. As shown by the fatty acid composition and gene expression patterns, the levels of 18:1(9) and 18:2(9,12) remained almost constant either when the cells were grown at 35°C (normal growth temperature) or 22 and 40°C. The expression of desC (Δ9) and desA (Δ12) genes, which are responsible for the introduction of first and second double bonds into fatty acids, respectively, was not affected by the temperature shift from 35 to 22°C or to 40°C. Only the expression and mRNA stability of the desD gene (Δ6) that is responsible for the introduction of a third double bond into fatty acids were enhanced by a temperature shift from 35 to 22°C, but not the shift from 35 to 40°C. The increase in the level of desD mRNA elevated the desaturation of fatty acid from 18:2(9,12) to 18:3(6,9,12) at 22°C. However, the increased level of 18:3(6,9,12) was observed after 36 h of incubation at 22°C, indicating a slow response to temperature of fatty acid desaturation in this cyanobacterium. These findings suggest that the desaturation of fatty acids might not be a key mechanism in the response to the temperature change of S. platensis strain C1.
doi_str_mv 10.1111/j.1574-6968.2000.tb09015.x
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In this study, we found that the desaturation of fatty acid to yield the di-unsaturated fatty acid 18:2(9,12), in Spirulina platensis strain C1, was not regulated by temperature. As shown by the fatty acid composition and gene expression patterns, the levels of 18:1(9) and 18:2(9,12) remained almost constant either when the cells were grown at 35°C (normal growth temperature) or 22 and 40°C. The expression of desC (Δ9) and desA (Δ12) genes, which are responsible for the introduction of first and second double bonds into fatty acids, respectively, was not affected by the temperature shift from 35 to 22°C or to 40°C. Only the expression and mRNA stability of the desD gene (Δ6) that is responsible for the introduction of a third double bond into fatty acids were enhanced by a temperature shift from 35 to 22°C, but not the shift from 35 to 40°C. The increase in the level of desD mRNA elevated the desaturation of fatty acid from 18:2(9,12) to 18:3(6,9,12) at 22°C. However, the increased level of 18:3(6,9,12) was observed after 36 h of incubation at 22°C, indicating a slow response to temperature of fatty acid desaturation in this cyanobacterium. These findings suggest that the desaturation of fatty acids might not be a key mechanism in the response to the temperature change of S. platensis strain C1.</description><identifier>ISSN: 0378-1097</identifier><identifier>EISSN: 1574-6968</identifier><identifier>DOI: 10.1111/j.1574-6968.2000.tb09015.x</identifier><identifier>PMID: 10713422</identifier><identifier>CODEN: FMLED7</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Bacteriology ; Biological and medical sciences ; Biology of microorganisms of confirmed or potential industrial interest ; Biotechnology ; Culture Media ; Cyanobacteria ; Cyanobacteria - enzymology ; Cyanobacteria - genetics ; Desaturase ; Desaturation ; Fatty acid composition ; Fatty Acid Desaturases - genetics ; Fatty Acid Desaturases - metabolism ; Fatty acid desaturation ; Fatty acids ; Fatty Acids - metabolism ; Fundamental and applied biological sciences. Psychology ; Gene expression ; Gene Expression Regulation, Bacterial ; Gene regulation ; Genes ; Genetics ; Half-Life ; Lipids ; Membranes ; Microbiology ; Mission oriented research ; mRNA stability ; RNA, Messenger - metabolism ; Spirulina platensis ; Temperature ; Temperature adaptation ; Temperature dependence ; Temperature stress ; Temperature tolerance</subject><ispartof>FEMS microbiology letters, 2000-03, Vol.184 (2), p.207-213</ispartof><rights>2000 Federation of European Microbiological Societies 2000</rights><rights>2000 INIST-CNRS</rights><rights>2000 Federation of European Microbiological Societies</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4057-18c0fba53f5f7ef8f5315bd846504120022e7b78d01a5657400219a3b71979063</citedby><cites>FETCH-LOGICAL-c4057-18c0fba53f5f7ef8f5315bd846504120022e7b78d01a5657400219a3b71979063</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1574-6968.2000.tb09015.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1574-6968.2000.tb09015.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27923,27924,45573,45574</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=1313161$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/10713422$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Deshnium, Patcharaporn</creatorcontrib><creatorcontrib>Paithoonrangsarid, Kalyanee</creatorcontrib><creatorcontrib>Suphatrakul, Amporn</creatorcontrib><creatorcontrib>Meesapyodsuk, Dauenpen</creatorcontrib><creatorcontrib>Tanticharoen, Morakot</creatorcontrib><creatorcontrib>Cheevadhanarak, Supapon</creatorcontrib><title>Temperature-independent and -dependent expression of desaturase genes in filamentous cyanobacterium Spirulina platensis strain C1 (Arthrospira sp. 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PCC 9438)</atitle><jtitle>FEMS microbiology letters</jtitle><addtitle>FEMS Microbiol Lett</addtitle><date>2000-03</date><risdate>2000</risdate><volume>184</volume><issue>2</issue><spage>207</spage><epage>213</epage><pages>207-213</pages><issn>0378-1097</issn><eissn>1574-6968</eissn><coden>FMLED7</coden><abstract>Abstract The alteration of the degree of unsaturated fatty acids in membrane lipids has been shown to be a key mechanism in the tolerance to temperature stress of living organisms. The step that most influences the physiology of membranes has been proposed to be the amount of di-unsaturated fatty acids in membrane lipids. In this study, we found that the desaturation of fatty acid to yield the di-unsaturated fatty acid 18:2(9,12), in Spirulina platensis strain C1, was not regulated by temperature. As shown by the fatty acid composition and gene expression patterns, the levels of 18:1(9) and 18:2(9,12) remained almost constant either when the cells were grown at 35°C (normal growth temperature) or 22 and 40°C. The expression of desC (Δ9) and desA (Δ12) genes, which are responsible for the introduction of first and second double bonds into fatty acids, respectively, was not affected by the temperature shift from 35 to 22°C or to 40°C. Only the expression and mRNA stability of the desD gene (Δ6) that is responsible for the introduction of a third double bond into fatty acids were enhanced by a temperature shift from 35 to 22°C, but not the shift from 35 to 40°C. The increase in the level of desD mRNA elevated the desaturation of fatty acid from 18:2(9,12) to 18:3(6,9,12) at 22°C. However, the increased level of 18:3(6,9,12) was observed after 36 h of incubation at 22°C, indicating a slow response to temperature of fatty acid desaturation in this cyanobacterium. These findings suggest that the desaturation of fatty acids might not be a key mechanism in the response to the temperature change of S. platensis strain C1.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>10713422</pmid><doi>10.1111/j.1574-6968.2000.tb09015.x</doi><tpages>7</tpages></addata></record>
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identifier ISSN: 0378-1097
ispartof FEMS microbiology letters, 2000-03, Vol.184 (2), p.207-213
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source MEDLINE; Oxford University Press Journals All Titles (1996-Current); Wiley Online Library All Journals; Alma/SFX Local Collection
subjects Bacteriology
Biological and medical sciences
Biology of microorganisms of confirmed or potential industrial interest
Biotechnology
Culture Media
Cyanobacteria
Cyanobacteria - enzymology
Cyanobacteria - genetics
Desaturase
Desaturation
Fatty acid composition
Fatty Acid Desaturases - genetics
Fatty Acid Desaturases - metabolism
Fatty acid desaturation
Fatty acids
Fatty Acids - metabolism
Fundamental and applied biological sciences. Psychology
Gene expression
Gene Expression Regulation, Bacterial
Gene regulation
Genes
Genetics
Half-Life
Lipids
Membranes
Microbiology
Mission oriented research
mRNA stability
RNA, Messenger - metabolism
Spirulina platensis
Temperature
Temperature adaptation
Temperature dependence
Temperature stress
Temperature tolerance
title Temperature-independent and -dependent expression of desaturase genes in filamentous cyanobacterium Spirulina platensis strain C1 (Arthrospira sp. PCC 9438)
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