Histidine-114 at Subsites E and F Can Explain the Characteristic Enzymatic Activity of Guinea Hen Egg-white Lysozyme

2003 ◽  
Vol 67 (3) ◽  
pp. 540-546 ◽  
Author(s):  
Gen TOSHIMA ◽  
Shunsuke KAWAMURA ◽  
Tomohiro ARAKI ◽  
Takao TORIKATA
Keyword(s):  
Enzymatic Activity ◽  
Egg White ◽  
Hen Egg White Lysozyme ◽  
Egg White Lysozyme ◽  
Hen Egg White ◽  
Hen Egg

scholarly journals HEAVY METAL-INDUCED INHIBITION OF ENZYMATIC ACTIVITY IN HEN EGG WHITE LYSOZYME

2018 ◽  
Vol 11 (11) ◽  
pp. 212
Author(s):  
Michel Pazmiño ◽  
Silva Monica ◽  
Welbaum James ◽  
Gaibor Juan ◽  
Altuna Jose Luis ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Enzymatic Activity ◽  
Egg White ◽  
Activity Levels ◽  
Hen Egg White Lysozyme ◽  
Egg White Lysozyme ◽  
Hen Egg White ◽  
Hen Egg

Objective: The objective of this study was to determine the content of chromium (Cr), nickel (Ni), cadmium (Cd), boron (B), mercury (Hg), and lead (Pb) in chicken hen eggs in hen’s eggs and to evaluate their influence on the enzymatic activity of hen egg white lysozyme (HEWL).Methods: In this study, we have determined the content of Cr, Ni, Cd, B, Hg, and Pb in chicken hen eggs using absorption atomic (AA) method. The residual enzymatic activity of HEWL, HEWL was evaluated using spectrophotometric method.Results: The levels of Cr, Ni, Cd, B, Hg, and Pb in hen eggs were 1.8300, 1.1300, 0.5350, 0.5200, 0.0025, and 0.0021 mg/kg, respectively. The inhibition of enzymatic activity of HEWL, by exposure to heavy metals was studied. We found that Cr, Ni, Cd, B, Hg, and Pb produced a loss of enzymatic activity. Cr III was the metal with the highest reduction of HEWL enzymatic activity. 0.01 M of Cr III was able to reduce HEWL enzymatic activity levels up to 49% after 24 h of exposure to this metal. An exposure of 0.05 M of Cr III reduced HEWL enzymatic activity to 1%. 24 h exposure to 0.01 M of Cd presented a reduction of 37% of HEWL enzymatic activity and 0.05 M of Cd resulted in only 75% of HEWL enzymatic residual activity.Conclusions: Content of heavy metals in hen egg from Tungurahua region was high. Cr, Ni, Cd, B, Hg, and Pb produced a loss of enzymatic activity of HEWL.

Inactivation of hen egg-white lysozyme. The azide radical

1997 ◽  
Vol 94 ◽  
pp. 356-364 ◽  
Author(s):  
M Faraggi ◽  
E Bettelheim ◽  
M Weinstein
Keyword(s):  
Egg White ◽  
Hen Egg White Lysozyme ◽  
Egg White Lysozyme ◽  
Hen Egg White ◽  
Hen Egg

The inhibitory role of clioquinol in the fibrillation of hen egg white lysozyme

2021 ◽  
pp. 138830
Author(s):  
Baoliang Ma ◽  
Haohao Wang ◽  
Yujie Liu ◽  
Fang Wu ◽  
Xudong Zhu
Keyword(s):  
Egg White ◽  
Hen Egg White Lysozyme ◽  
Egg White Lysozyme ◽  
Inhibitory Role ◽  
Hen Egg White ◽  
Hen Egg
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