Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Peptidoglycan

  • Felipe Gomez
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1165-2

Definition

Peptidoglycan is a polymer with a structural role in the bacterial cell wall. It is a barrier that provides structural strength to the bacteria. It is made of polysaccharides attached to oligopeptides in linear chains ( N-acetylglucosamine and N-acetylmuramic acid alternating with cross-linked oligopeptides (no more than five amino acids)). The oligopeptides are attached to N-acetylmuramic acid. Due to the cross-linked oligopeptide, it constitutes a 3D structural layer, which is thicker in the case of Gram-positive bacteria (Fig. 1).

Keywords

Cell Wall Bacterial Cell Bioorganic Chemistry Structural Layer Linear Chain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Centro de Astrobiología (CSIC/INTA)Instituto Nacional de Técnica AeroespacialTorrejón de ArdozSpain