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J Bacteriol. 1969 April; 98(1): 62-68
Copyright © 1969 American Society for Microbiology. All Rights Reserved.

Biochemical Studies of Bacterial Sporulation and Germination XII. A Sulfonic Acid as a Major Sulfur Compound of Bacillus subtilis Spores

Department of Marine Biology, Scripps Institution of Oceanography, University of California (San Diego), La Jolla, California 92037
Department of Biochemistry, Stanford University School of Medicine, Stanford, California 94305

ABSTRACT

A sulfonic acid found to be a major constituent of spores of Bacillus subtilis was provisionally identified as 3-L-sulfolactic acid. This compound was completely absent from vegetative cells during growth, but large amounts accumulated in sporulating cells just before the development of refractile spores. Essentially all of the accumulated sulfolactic acid was eventually incorporated into the nature spore, where it may represent more than 5% of the dry weight of the spore. Germination resulted in the rapid and complete release into the medium of unaltered sulfolactic acid. This compound was not found in spores of Bacillus megaterium, B. cereus, or B. thuringiensis.

¹ Present address: Biochemisch Laboratorium der Rijks-universiteit, Vondellaan 26, Utrecht, The Netherlands.

² Present address: Laboratory of Molecular Biology, Hills Road, Cambridge, England. The material in this paper is taken in part from a thesis submitted by James A. Spudich in partial fulfillment of the requirements for the Ph.D. degree, Department of Biochemistry, Stanford University, 1967.

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