Glutathione S-transferase in the developmental stages of the insect Apis mellifera macedonica.
We investigated the pattern of glutathione S-transferase (GST) activity in the course of the development of Apis mellifera macedonica. GST activity is present in all developmental stages of A. mellifera macedonica. The highest activity towards the substrate 1-chloro-2,4-dinitrobenzene (CDNB) is found in the adult stage and the lowest in the egg. The kinetic characteristics of the whole enzyme change as the insect develops. Significant changes are observed in substrate specificity, inhibitor sensitivity and V(max). The number of isoenzymes and their rate of expression vary as the insect develops. However, two main isoenzymes are present in all developmental stages, one in the alkaline area and the other in the acidic. While in the larval stage the acidic isoenzyme is expressed at a slightly higher rate (52.2% over 47.8% for the alkaline isoenzyme), in the adult stage, the rate is reversed dramatically (13.24% and 84.2%, respectively).
Papadopoulos
Athanasios I
AI
Laboratory of Animal Physiology, Department of Zoology, Faculty of Science, School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54006, Greece. thanpap@bio.auth.gr
Polemitou
Irene
I
Laifi
Pshychoula
P
Yiangou
Astero
A
Tananaki
Chrysoula
C
D000818:Animals; D001516:Bees / Q000201:enzymology* / Q000254:growth & development*; D003600:Cytosol / Q000201:enzymology; D004137:Dinitrochlorobenzene / Q000378:metabolism; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005982:Glutathione Transferase / Q000302:isolation & purification / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D020128:Inhibitory Concentration 50; D007527:Isoenzymes / Q000302:isolation & purification / Q000378:metabolism; D007700:Kinetics; D008018:Life Cycle Stages; D012680:Sensitivity and Specificity; D013379:Substrate Specificity
D004137:Dinitrochlorobenzene; D004791:Enzyme Inhibitors; D007527:Isoenzymes; D005982:Glutathione Transferase