Biosynthesis and degradation of storage protein in spores of the fungus Botryodiplodia theobromae.

G. R. Petersen, K. R. Dahlberg, J. L. Van Etten

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Muiridin, a spore-specific protein of the fungus Botryodiplodia theobromae, comprises about 25% of the mature pycnidiospore protein. It has an apparent molecular weight of 16,000 to 17,000 and is rich in glutamine, asparagine, and arginine. Muiridin is synthesized in developing spores via a precursor with an apparent molecular weight of 24,000. Two other polypeptides present in young developing spores with apparent molecular weights of 18,000 and 15,000 are immunologically related to muiridin. We propose a pathway for muiridin synthesis. Muiridin is actively degraded during the germination of spores from 30-day-old cultures. This degradation is independent of exogenous amino acids in the germination medium. In contrast, glutamine and, to a lesser extent, asparagine partially inhibit the degradation of muiridin during germination of spores from 7-day-old cultures.

Original languageEnglish (US)
Pages (from-to)601-606
Number of pages6
JournalJournal of bacteriology
Issue number2
StatePublished - Aug 1983
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology

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