UMMS Affiliation

Department of Molecular Genetics and Microbiology; Department of Microbiology and Physiological Systems

Publication Date


Document Type



Bacteriology | Biochemistry, Biophysics, and Structural Biology | Physiology


Acid-soluble spore proteins (ASSPs) comprise about 5% of the total protein of mature spores of different Bacillus subtilis strains. They consist of three abundant species, alpha, beta, and gamma, four less abundant species, and several minor species, alpha, beta, and gamma make up about 18, 18 and 36%, respectively, of the total ASSPs of strain 168, have molecular weights of 5,900, 5,9000, and 11,000, respectively, and resemble the major (A, C, and B) components of Bacillus megaterium ASSPs in several respects, including sensitivity to a specific B. megaterium spore endopeptidase. However, they have pI's of 6.58, 6.67, and 7.96, all lower than those of any of the B. megaterium ASSPs. Although strains varied in the proportions of different ASSPs, to overall patterns seen on gel electrophoresis are constant. ASSPs are located interior to the cortex, presumably in the spore cytoplasm, and are synthesized during sporulation and degraded during germination.


Bacillus subtilis, Acid-soluble spore proteins

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Copyright © 1981, American Society for Microbiology. Publisher PDF posted as allowed by the publisher's copyright policy at


J Bacteriol. 1981 Jun;146(3):972-82. Link to article on publisher's website

Journal/Book/Conference Title

Journal of bacteriology

Related Resources

Link to Article in PubMed

PubMed ID