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J Bacteriol. 1972 November; 112(2): 849-855
Copyright © 1972 American Society for Microbiology. All Rights Reserved.

Myxospore Formation in Myxococcus xanthus: Chemical Changes in the Cell Wall During Cellular Morphogenesis1

Roosevelt Y. Johnson and David White

a Department of Microbiology, Indiana University, Bloomington, Indiana 47401

ABSTRACT

Vegetative cells of Myxococcus xanthus (strain FB) were induced to form myxospores by the glycerol induction technique. Several structural changes took place in the peptidoglycan during myxospore formation. The percent of the peptidoglycan comprised of monomer (disaccharide peptide) decreased from about 20% to approximately 7%. The proportion of the total diaminopimelic acid possessing a free amino group decreased about 11%. A carbohydrate containing only glucose was found to be bound, possibly covalently, to the vegetative cell and myxospore peptidoglycan. The amount of carbohydrate relative to peptidoglycan decreased by two-thirds during myxospore formation. None of the above changes in the peptidoglycan were observed in a mutant (strain GNI) of M. xanthus which was unable to convert to myxospores when incubated in the glycerol induction medium, or in the parental wild type (FB) when it was incubated in induction medium lacking the myxospore inducer, glycerol.

FOOTNOTES

1 Taken in part from a dissertation submitted by R. Y. Johnson to Indiana University in partial fulfillment of the requirements for the Ph.D. degree.

J Bacteriol. 1972 November; 112(2): 849-855
Copyright © 1972 American Society for Microbiology. All Rights Reserved.



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