Journal
FOOD AND CHEMICAL TOXICOLOGY
Volume 160, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fct.2021.112801
Keywords
Bovine liver catalase; Fluorescence spectroscopy; Combination effect; Natural yellow; Surface plasmon resonance
Categories
Ask authors/readers for more resources
This research investigated the effects of natural yellow on the performance of carmoisine-inhibited bovine liver catalase using multispectral and theoretical methods. The results showed that natural yellow can restore the activity of carmoisine-inhibited catalase and repair the structural changes caused by carmoisine. Furthermore, natural yellow can reduce the stability of the carmoisine-catalase complex. Surface plasmon resonance analysis indicated that natural yellow has a higher affinity to catalase compared to carmoisine.
In this research retrieval effects of natural yellow (NY) on the performance of carmoisine (CAR) inhibited bovine liver catalase (BLC) was studied using multispectral and theoretical methods. Kinetic studies showed that CAR inhibited BLC through competitive inhibition (IC50 value of 2.24 x 10(-6) M) while the addition of NY recover the activity of CAR-BLC up to 82% in comparison with the control enzyme. Circular dichroism data revealed that NY can repair the structural changes of BLC, affected by CAR. Furthermore, an equilibrium dialysis study indicated that NY could reduce the stability of the CAR-catalase complex. The surface plasmon resonance (SPR) data analysis indicated a high affinity of NY to BLC compared to CAR and the binding of NY led to a decrease in the affinity of the enzyme to the inhibitor. On the other hand, fluorescence and molecular docking studies showed that the quenching mechanism of BLC by CAR occurs through a static quenching process, and van der Waals forces and hydrogen bonding play a crucial role in the binding of CAR to BLC. MLSD data demonstrated that NY could increase the binding energy of CAR-BLC complex from -7.72 kJ mol(-1) to -5.9 kJ mol(-1), leading to complex instability and catalase activity salvage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available