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To investigate properties of the proteolytic activity of a yeast cell wall lytic soil bacterium identified as an Arthrobacter species.
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Klinger and Röhr (1972) isolated from soil samples a bacterium capable of lysing yeast cell walls, which was identified as Arthrobacter species. The induced formation of a-manannase, b-1,3-glucanase and chitinase was studied in detail by John and Hampel (1991) and Latzko and Hampel (1993, 1995). A low proteolytic activity was detected in further experiments. This paper describes studies for the characterization of the extracellular proteolytic activity detected with cells of Arthrobacter sp.
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Compared with other yeast cell wall lytic bacteria the proteolytic activity of Arthrobacter sp. is formed in considerable amounts only in media with very high protein content.
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The proteolytic activity is highly alkaline stable. The formation of the enzyme can be induced by media with high protein content.
(B.F. Adamitsch, F. Karner and W. Hampel - 2003)
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Arthrobacter species, isolated from the leaf cavities and the microsporocarps of the aquatic fern species Azolla pinnata and Azolla filiculoides, produced indole-3-acetic acid (IAA) in culture when the precursor tryptophan was added to the medium.
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The three species of Arthrobacter isolated from Azolla produced IAA in mineral medium, confirming previous observations (Forni & Grilli Caiola, 1988).
(C. Forni, J. Riov, M. Grilli Caiola, E. Tel-Or - 1992)
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