Growth pattern of the murein sacculus of Escherichia coli.
نویسندگان
چکیده
منابع مشابه
Growth of the Stress-Bearing and Shape-Maintaining Murein Sacculus of Escherichia coli
INTRODUCTION .......................................................................................................................................................181 Reinforcement for the Wall ...................................................................................................................................181 MUREIN, A CROSS-LINKED BIOPOLYMER ....................................
متن کاملGrowth of the stress-bearing and shape-maintaining murein sacculus of Escherichia coli.
To withstand the high intracellular pressure, the cell wall of most bacteria is stabilized by a unique cross-linked biopolymer called murein or peptidoglycan. It is made of glycan strands [poly-(GlcNAc-MurNAc)], which are linked by short peptides to form a covalently closed net. Completely surrounding the cell, the murein represents a kind of bacterial exoskeleton known as the murein sacculus. ...
متن کاملHeterogeneity of newly inserted and preexisting murein in the sacculus of Escherichia coli.
In vivo studies of murein biosynthesis show that newly synthesized murein unexpectedly differs in its chemical composition from preexisting murein. New murein is loosely crosslinked with the preexisting sacculus; in a maturation process involving further transpeptidation, the final stage of crosslinkage in murein is achieved. Newly inserted murein initially carries pentapeptide subunits, which ...
متن کاملMurein segregation in Escherichia coli.
Peptidoglycan (murein) segregation has been studied by means of a new labeling method. The method relies on the ability of Escherichia coli cells to incorporate D-Cys into macromolecular murein. The incorporation depends on a periplasmic amino acid exchange reaction. At low concentrations, D-Cys is innocuous to the cell. The distribution of modified murein in purified sacculi can be traced and ...
متن کاملOn the architecture of the gram-negative bacterial murein sacculus.
The peptidoglycan network of the murein sacculus must be porous so that nutrients, waste products, and secreted proteins can pass through. Using Escherichia coli and Pseudomonas aeruginosa as a baseline for gram-negative sacculi, the hole size distribution in the peptidoglycan network has been modeled by computer simulation to deduce the network's properties. By requiring that the distribution ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1990
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)30613-0