Beitrag
Advances in cyanobacterial S-layers
Šmarda, Jan; Šmajs, David; Komrska, Jiří
Algological Studies/Archiv für Hydrobiologie, Supplement Volumes No. 83 (1996), p. 501 - 510
10 Literaturangaben
veröffentlicht: Dec 19, 1996
DOI: 10.1127/algol_stud/83/1996/501
ArtNo. ESP142011700036, Preis: 29.00 €
Abstract
This paper summarizes results of research on the cyanobacterial S-layers obtained between 1989 and 1995. In 12 chroococcal strains (of six species) and in one filamentous strain, S-layers were found by electron microscopy and characterized. Laser diffractometry permitted a more detailed analysis. Most S-layers were of a hexagonal lattice (p6 symmetry), their subunit center-to-center spacing ranging from 10.7 nm (Microcystis cf aeruginosa, natural population, Brno 1993) to 17.6 nm (Synechocystis aquatilis, strain MARKLE 1430/3). Tetragonal protomer lattice (p4) was found in Cyanothece cedrorum, strain LEFÈVRE 1937/19 (8.3 x 5.4 nm spacing) and in Synechococcus bigranulatus, strain KOVROV 1972/8 (1o.8x 8.6 nm spacing). Strip-latticed (p2) S-layers were exposed on cells of Cyanothece aeruginosa, strain KOCH 1974 (8.6 nm) and of Leptolyngbya hypolimnetica (9.4 nm spacing), which is one of the first findings of S-layers on filamentous, multicellular organisms. The S-layer of Cyanothece cedrorum is the finest ever seen in cyanobacteria.
Schlagworte
Cyanobacteria • cell wall • S-Iayer • crystalline lattice • Synechococcaceae • Merismopediaceae • Microcystaceae • Pseudanabaenaceae • freeze-etching • electron microscopy • laser diffractometry