Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Nucleotide effects on glucan-synthesis activities of particulate enzymes from Saprolegnia

Michel Fèvre
Planta
Vol. 159, No. 2 (1983), pp. 130-135
Published by: Springer
Stable URL: http://www.jstor.org/stable/23377046
Page Count: 6
  • More info
  • Cite this Item
Nucleotide effects on glucan-synthesis activities of particulate enzymes from Saprolegnia
Preview not available

Abstract

Membrane-bound β-1-3- and β-1-4-glucan synthetases of Saprolegnia are affected in vitro by the presence of nucleotides. Both enzymatic activities are inhibited by uridine nucleotides. Guanosine 5′-triphosphate and ATP reduce β-1-3-glucan synthesis but stimulate β-1-4-glucan production; they also increase Vmax without effect on the Km for uridine 5′-diphosphate glucose. The stimulation by ATP could be the result of an activation or stabilization of the enzymes and might have implications for cell-wall construction during hyphal growth.

Page Thumbnails

  • Thumbnail: Page 
[130]
    [130]
  • Thumbnail: Page 
131
    131
  • Thumbnail: Page 
132
    132
  • Thumbnail: Page 
133
    133
  • Thumbnail: Page 
134
    134
  • Thumbnail: Page 
135
    135