Effects of amino acids on the blue-green alga (cyanobacteria) Tolypothrix scytonemoides (Gardner) Geitler

2006 ◽  
Vol 8 (3) ◽  
pp. 286-293
Author(s):  
Uma Maheshwari Rajendran ◽  
Elango Kathirvel ◽  
Anand Narayanaswamy
Keyword(s):  
Amino Acids ◽  
Green Alga ◽  
Blue Green Alga

scholarly journals In vitro Protein Synthesis and Measurement of the Stability of Messenger RNA in the Blue-green Alga, Anabaena variabilis

Microbiology ◽  
2000 ◽  
Vol 81 (1) ◽  
pp. 47-58 ◽  
Author(s):  
C. K. Leach ◽  
N. G. Carr
Keyword(s):  
Amino Acids ◽  
Green Alga ◽  
Messenger Rna ◽  
Antibiotic Sensitivity ◽  
Anabaena Variabilis ◽  
Blue Green Alga ◽  
Peptide Formation ◽  
A Cell ◽  
The Stability

A cell-free preparation of the blue-green alga, Anabaena variabilis, that incorporates 14C-labelled amino acids into protein has been prepared and characterized. The activation of amino acids to amino acid transfer RNAs was characterized, and assembly of these into peptides has been described with respect to cofactor requirements and antibiotic sensitivity. The properties of these systems and the effect of antibiotics on them are similar to those of bacteria. Both natural and synthetic messenger RNA were effective in peptide formation. The kinetics of incorporation of [14C]uracil into RNA has been examined and the stability of labelled RNA from A. variabilis measured by radioactivity loss and by its role in directing peptide synthesis. The half-life of messenger RNA from this organism is approximately 12 min, and as such is comparable to that of bacteria when based upon the mean generation time of the respective organisms.

A new isolation and structure for the endotoxin from Microcystis aeruginosa NRC-1

1970 ◽  
Vol 48 (4) ◽  
pp. 508-510 ◽  
Author(s):  
J. Rama Murthy ◽  
J. B. Capindale
Keyword(s):  
Amino Acids ◽  
Body Weight ◽  
Solvent Extraction ◽  
Microcystis Aeruginosa ◽  
Green Alga ◽  
Complex Structure ◽  
Strain Analysis ◽  
Blue Green Alga ◽  
Algal Strain ◽  
Toxic Material

The endotoxin from the blue–green alga Microcystis aeruginosa NRC-1 has been isolated as its ammonium salt by a new procedure involving solvent extraction and elution from DEAE-Sephadex A-25. The intraperitoneal LD100 of this toxin preparation for mice was 0.1 mg/kg body weight. The product is a white solid which appears to be chromatographically and electrophoretically homogeneous. This toxin produces similar symptoms in mice to those described originally for the toxic material from the same algal strain. Analysis of the toxin hydrolysate indicates a more complex structure since seven more amino acids have been found, including tyrosine, proline, and arginine, in addition to the seven reported before.

Production of amino acids by the N2-fixing blue-green alga Anabaena variabilis var. kashiensis

1985 ◽  
Vol 140 (4) ◽  
pp. 333-339
Author(s):  
A.A. El-Essawy ◽  
E.Y. El-Ayouty ◽  
Y.M. El-Ayouty
Keyword(s):  
Amino Acids ◽  
Green Alga ◽  
Anabaena Variabilis ◽  
Blue Green Alga

Effect of Iron Limitation on the Ultrastructure of Agmenellum Quadruplicatum

1981 ◽  
Vol 39 ◽  
pp. 410-411
Author(s):  
L. P. Hardie ◽  
D. L. Balkwill ◽  
S. E. Stevens
Keyword(s):  
Growth Medium ◽  
Green Alga ◽  
Natural Habitat ◽  
Iron Limitation ◽  
Natural Environments ◽  
Blue Green Alga ◽  
Marine Cyanobacterium ◽  
Natural Systems ◽  
Thin Sectioning ◽  
Agmenellum Quadruplicatum

Agmenellum quadruplicatum is a unicellular, non-nitrogen-fixing, marine cyanobacterium (blue-green alga). The ultrastructure of this organism, when grown in the laboratory with all necessary nutrients, has been characterized thoroughly. In contrast, little is known of its ultrastructure in the specific nutrient-limiting conditions typical of its natural habitat. Iron is one of the nutrients likely to limit this organism in such natural environments. It is also of great importance metabolically, being required for both photosynthesis and assimilation of nitrate. The purpose of this study was to assess the effects (if any) of iron limitation on the ultrastructure of A. quadruplicatum. It was part of a broader endeavor to elucidate the ultrastructure of cyanobacteria in natural systemsActively growing cells were placed in a growth medium containing 1% of its usual iron. The cultures were then sampled periodically for 10 days and prepared for thin sectioning TEM to assess the effects of iron limitation.

scholarly journals Uridine Diphosphate Galacturonate 4-Epimerase from the Blue-Green Alga Anabaena flos-aquae

1974 ◽  
Vol 249 (8) ◽  
pp. 2366-2372
Author(s):  
Mary A. Gaunt ◽  
Utpalendu S. Maitra ◽  
Helmut Ankel
Keyword(s):  
Green Alga ◽  
Uridine Diphosphate ◽  
Blue Green Alga

scholarly journals Superoxide dismutases from a blue-green alga, Plectonema boryanum.

1975 ◽  
Vol 250 (8) ◽  
pp. 2801-2807 ◽  
Author(s):  
K Asada ◽  
K Yoshikawa ◽  
M Takahashi ◽  
Y Maeda ◽  
K Enmanji
Keyword(s):  
Green Alga ◽  
Superoxide Dismutases ◽  
Blue Green Alga ◽  
Plectonema Boryanum
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