1997
Twenty-five years on experience on S-layers of cyanobacteria: occurrence and patterns.
ŠMARDA, Jan, David ŠMAJS, Jiří KOMRSKA a Vladimír KRZYŽANEKZákladní údaje
Originální název
Twenty-five years on experience on S-layers of cyanobacteria: occurrence and patterns.
Autoři
ŠMARDA, Jan, David ŠMAJS, Jiří KOMRSKA a Vladimír KRZYŽANEK
Vydání
FEMS Microbiol.Rev. 1997
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10600 1.6 Biological sciences
Stát vydavatele
Německo
Utajení
není předmětem státního či obchodního tajemství
Organizační jednotka
Lékařská fakulta
Změněno: 24. 1. 2003 11:07, prof. MUDr. David Šmajs, Ph.D.
Anotace
V originále
S-layers are now considered a common cell wall structure in Bacteria and Archaea as well as in some algae. Morphological and chemical studies have revealed that S-layers consist of crystalline arrays of protein or glycoprotein subunits forming oblique, square or hexagonal lattices on the cell surface. Electron microscopy and computer image enhancement techniques have been applied to obtain structural information down to the nanometer range. This chapter deals with the wide distribution of S-layer among cyanobacteria, and their morphological and chemical characterization, and the potential of high resolution electron microscopic studies applied to the cell envelope of Pyrodictium. The occurrence of S-layers in cyanobacteria was investigated by cryomethods and ultrathin sectioning. These investigations indicate that the ultrastructure of S-layers may be exploited as an auxiliary taxonomic criterion in the classification of cyanobacteria. Pyrodictium is the first organism which has shown an optimum growth temperature above 100oC. The highly irregularly shaped, flagellated cells are interconnected by extracellular tubules. The three- dimensional structure of this network was visualized with high resolution scanning electron microscopy while the fine structure of the cell wall architecture was studied in detail with various electron microscopic techniques. Both contributions demonstrate that the investigation of the fine structure of S-layers is fundamental for establishing structure-function relationships for these two-dimensional crystalline arrays