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. 1987 Jan;169(1):97–101. doi: 10.1128/jb.169.1.97-101.1987

Effect of growth rate and cell shape on the peptidoglycan composition in Escherichia coli.

F Driehuis, J T Wouters
PMCID: PMC211739  PMID: 3539928

Abstract

The muropeptide composition of peptidoglycan from Escherichia coli W7 cultivated at different growth rates in chemostat cultures was compared by using high-pressure liquid chromatography. At a low growth rate (D = 0.1 h-1), about 40% more covalently bound lipoprotein and at least twofold more diaminopimelyl-diaminopimelic acid cross-bridges were found than at a high growth rate (D = 0.8 h-1). The total degree of cross-linkage was only slightly increased, and the fraction of trimeric muropeptides and the average length of the glycan chains were not changed significantly. Analysis of the peptidoglycan from a morphological variant strain of W7 revealed that the altered peptidoglycan composition in slowly growing W7 cells was not correlated with the observation that these cells, due to their decreased cell length, were relatively enriched in polar material. In fact, our results suggested that peptidoglycan forming cell poles is chemically identical to that forming lateral wall.

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Selected References

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