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  • 1990-1994  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Multiple responses to heat stress by the basidiomyceteSchizophyllum commune (1993)
    Springer
    Current microbiology 26 (1993), S. 123-127 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Temperatures in excess of 45°C are required to stop the growth ofSchizophyllum commune colonies. Transfer of colonies from normal growth conditions (21°C) to 55°C, while halting mycelial expansion and increasing the production of aerial hyphae, was not lethal. Shortterm heat shock (3h) resulted in the appearance of nine proteins resolvable by SDS-PAGE that were newly synthesized or had their synthesis increased. The molecular weights of these proteins qualify two of them as being members of the hsp90 and hsp 70 families of heat shock proteins. Heat shock also affected proteolytic processes in the colonies. Changes in the pattern of ubiquitinated protein conjugates occurred; fewer high-molecular-weight conjugates were found in heat-shocked colonies, and the appearance of a ladder of lower-molecular-weight conjugates was noted. Protease enzymes detected by gelatin-gel PAGE showed a general decrease in activity. One of these proteases, which was up-regulated during nitrogen deprivation, showed an intermediate response during the combined stresses of heat shock and nitrogen starvation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01577364
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Proteolysis and amino acid recycling during nitrogen deprivation inSchizophyllum commune (1991)
    Springer
    Current microbiology 23 (1991), S. 27-32 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Transfer of exponentially growing colonies ofSchizophyllum commune to nitrogen-deficient media for 6–60 h resulted in increased general proteolytic activity and decreased extractable protein when compared with controls. A concomitant increase in free radiolabeled leucine was detected in nitrogen-deprived colonies. Radiolabel was found in new surface hyphae following transfer of previously labeled colonies to media containing no label. The concentration of label present in the new growth indicates that this label is likely to have originated from proteolytic release of label from proteins in the older, central portions of the colony. The release of substantial amounts of label into the growth medium suggests that an extra-mycelial pathway may account, at least in part, for translocation of amino acids released by proteolysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02092305
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
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