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- Title
Surface layers of methanotrophic bacteria.
- Authors
Khmelenina, V.; Suzina, N.; Trotsenko, Yu.
- 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.
- Subjects
GLYCOPROTEINS; PROKARYOTES; METHANOTROPHS; POLYPEPTIDES; PEROXIDASE; METHYLOCOCCUS capsulatus; SIDEROPHORES
- Publication
Microbiology (00262617), 2013, Vol 82, Issue 5, p529
- ISSN
0026-2617
- Publication type
Article
- DOI
10.1134/S0026261713050068