Surface layers of methanotrophic bacteria |
| |
Authors: | V N Khmelenina N E Suzina Yu A Trotsenko |
| |
Institution: | 1. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino, Russia 2. Pushchino State Institute of Natural Sciences, Pushchino, Russia
|
| |
Abstract: | Structural and functional characteristics of the regular glycoprotein layers in prokaryotes are analyzed with a special emphasis on aerobic methanotrophic bacteria. S-Layers are present at the surfaces of Methylococcus, Methylothermus, and Methylomicrobium cells. Different Methylomicrobium species either synthesize S-layers with planar (p2, p4) symmetry or form cup-shaped or conical structures with hexagonal (p6) symmetry. A unique, copper-binding polypeptide ‘CorA’/MopE (27/45 kDa), which is coexpressed with the diheme periplasmic cytochrome c peroxidase ‘CorB’/Mca (80 kDa) was found in Methylomicrobium album BG8, Methylomicrobium alcaliphilum 20Z, and Methylococcus capsulatus Bath. This tandem of the surface proteins is functionally analogous to a new siderophore: methanobactin. Importantly, no ‘CorA’/MopE homologue was found in methanotrophs not forming S-layers. The role of surface proteins in copper metabolism and initial methane oxidation is discussed. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|