Cyanophycin granule polypeptide formation and degradation in the cyanobacterium Aphanocapsa 6308.

Abstract

The effect of a number of conditions on the amount of cyanophycin granule polypeptide [multi-L-arginyl poly(L-aspartic acid)] formed in the unicellular cyanobacterium Aphanocapsa 6308 was determined. Light, CO2, sulfur, and phosphorus starvation as well as the addition of arginine to culture media increased the amount of cyanophycin granule polypeptide in cells when compared with that in cells grown under conditions optimal for growth. Nitrogen limitation and reduction of growth temperature to 30 degrees C decreased the amount of cyanophycin granule polypeptide on a dry-weight basis. Shift-up and shift-down experiments suggest cyanophycin granule polypeptide may be a reserve nitrogen polymer in Aphanocapsa 6308.

• Authors: M M Allen, F Hutchison, P J Weathers
• Journal: Journal of bacteriology (J Bacteriol) Vol. 141 Issue 2 Pg. 687-93 (Feb 1980) ISSN: 0021-9193 [Print] United States
• PMID: 6767688 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S.)

Chemical References

• Peptides
• Plant Proteins
• Aspartic Acid
• Chloramphenicol
• Carbon
• Arginine

Topics

• Arginine (metabolism)
• Aspartic Acid (metabolism)
• Carbon (metabolism)
• Chloramphenicol (pharmacology)
• Cyanobacteria (growth & development, metabolism)
• Light
• Peptide Biosynthesis
• Peptides (metabolism)
• Plant Proteins (biosynthesis, metabolism)
• Temperature