Ribulose-1, 5- Bisphosphate carboxylase/ oxygenase (RubisCO) catalyzes the first step in net photosynthetic assimilation and photorespiratory carbon oxidation. The activity of this enzyme is modulated in response to changes in light intensity as suggested in a number of early reports. Several studies found that the natural inhibitor 2CA1P is involved in the inhibition of the enzyme under reduced light intensity in rice (Oryza sativa). Due to the lack of studies and information on the interaction between this inhibitor and the active site of the enzyme, we attempted to predict the interaction between the amino acids in the active site and the inhibitor using both Hyperchem7.5 and GOLD software. After the docking; three possibilities having the highest fitness score were found (65.71, 64.72, 62.04), in these possibilities the inhibitor was bound to the enzyme, the phosphate and carboxylate groups in the same positions with a clear difference in the position of OH. In order to confirm the accuracy of the genetic algorithm, the artificial inhibitor 2CABP was docked back in the active site of the enzyme using the same parameters used in the case of the 2CA1P and the algorithm's predictions were compared with the experimentally observed binding mode. The results showed that the difference in the active sites before and after the docking was in the range of 0.93 Å which indicated that the results were very accurate. Depending on this result it was concluded that the results obtained in the case of the 2CA1P were close to the experimental results.
This study aims to investigate the plausible inhibitory capacity of Matricaria pubescens methanolic extract (EMMP) on key diabetes-related enzymes in diabetic rats. A significant increase in the serum and pancreatic α-amylase activity in untreated diabetic rats (Diab) by 61% and 75% respectively produced a remarkable rise in blood glucose levels of 184% compared with the controls. However, the treatment of diabetic rats with the extract (Diab + EMMP) caused a significant decrease in pancreatic α-amylase activity in the pancreas (15%) and in serum (28%) compared to untreated diabetic rats. Therefore, a considerable reduction in blood sugar level has been observed reaching 28%. A significant decrease was observed in the glycated hemoglobin (HbA1c) level (28%) in rats treated with EMMP compared to untreated diabetics. Furthermore a significant increase in the pancreatic serum lipase activity (59%) compared to the control group, led to a distinguished inhibition (21%) in diabetic rats treated with EMMP. A potent protective action of β-cells was observed in diabetic rats treated with EMMP. However, we observed recovery in body weight in the diabetic rats treated with EMMP.
The chamomile plant, Matricaria chamomilla L., is a well-known medicinal plant species that is widely utilized in folk and traditional medicine to provide sedative as well as spasmolytic effects. In the present study and for the first time in Algeria, we examined in particular the content of essential and toxic elements in the Algerian plant M. chamomilla L., by using two analytical techniques Instrumental neutron activation analysis (INAA) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The findings from the two analytical techniques showed that there were twenty-one elements, comprising macro and microelements, including Ba, Br, Ca, Cl, Co, Cr, Cs, Eu, Fe, K, Mg, Mn, Mo, Na, Rb, Sb, Sc, Sr, Th, U, and Zn. The accuracy of these methods was verified and confirmed by analyzing three certified reference materials. This study demonstrated the abundance of mineral elements in M. chamomilla L. Additionally, the concentration of the toxic elements determined were within the Food and Agriculture Organization’s tolerance limits (FAO).
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