Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | LIPIDS OF THE ULTRA-THIN SQUARE MICROORGANISM HALOQUADRATUM WALSBYI |
| Abstract | The lipid composition of the extremely halophilic archaeon Haloquadratum walsbyi was investigated by thinlayer chromatography and electrospray ionization-mass spectrometry. The analysis of neutral lipids showed the presence of vitamin MK-8, squalene, carotene, bacterioruberin and several retinal isomers. The major polar lipids were phosphatidylglycerophosphate methyl ester, phosphatidylglycerosulfate, phosphatidylglycerol and sulfated diglycosyl diether lipid. Among cardiolipins, the tetra-phytanyl or dimeric phospholipids, only traces of bisphosphatidylglycerol were detected. When the cells were exposed to hypotonic medium, no changes in the membrane lipid composition occurred. Distinguishing it from other extreme halophiles of the Halobacteriaceae family, the osmotic stress did not induce the neo-synthesis of cardiolipins in H. walsbyi. The difference may depend on the threelaminar structure of the cell wall, which differs significantly from that of other Haloarchaea. |
| Source | Archaea 2(3), pp. 177–183 |
| Journal | Archaea |
| Editor | Hindawi Publishing Corporation, , |
| Year | 2008 |
| Type | Articolo in rivista |
| Authors | LOBASSO S., LOPALCO P., MASCOLO G., CORCELLI A. |
| Text | 67865 2008 LIPIDS OF THE ULTRA THIN SQUARE MICROORGANISM HALOQUADRATUM WALSBYI LOBASSO S., LOPALCO P., MASCOLO G., CORCELLI A. 1 Department of Medical Biochemistry, Biology and Physics, University of Bari, Bari, Italy 2 IRSA CNR, Bari, Italy 3 Corresponding author a.corcelli@biologia.uniba.it The lipid composition of the extremely halophilic archaeon Haloquadratum walsbyi was investigated by thinlayer chromatography and electrospray ionization mass spectrometry. The analysis of neutral lipids showed the presence of vitamin MK 8, squalene, carotene, bacterioruberin and several retinal isomers. The major polar lipids were phosphatidylglycerophosphate methyl ester, phosphatidylglycerosulfate, phosphatidylglycerol and sulfated diglycosyl diether lipid. Among cardiolipins, the tetra phytanyl or dimeric phospholipids, only traces of bisphosphatidylglycerol were detected. When the cells were exposed to hypotonic medium, no changes in the membrane lipid composition occurred. Distinguishing it from other extreme halophiles of the Halobacteriaceae family, the osmotic stress did not induce the neo synthesis of cardiolipins in H. walsbyi. The difference may depend on the threelaminar structure of the cell wall, which differs significantly from that of other Haloarchaea. 2 3 Lipids of the ultra thin square halophilic archaeon Haloquadratum walsbyi 2008_Archea.pdf Articolo in rivista Hindawi Publishing Corporation 1472 3646 Archaea Archaea giuseppe.mascolo MASCOLO GIUSEPPE TA.P07.002.002 Sviluppo di nuovi processi di controllo dell inquinamento idrico. |