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Catalase - PubAg

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Last Updated: 15 October 2021

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Grafted carrageenan: alginate gel beads for catalase enzyme covalent immobilization

The ideal focus of catalase for immobilization was 300U/ml and the most effective loading time was 6 h. The catalytic properties increased after immobilization and the debilitated catalase achieved optimal activity at a temperature level series of 30-- 50 ° C that was contrasted to the optimum activity of free catalase which took place at 40 ° C. Higher catalytic task of immobilized catalase happened at alkaline pHs than the free one which accomplished optimal catalytic activity at neutral pH. The results of the research indicate that the developed matrix can be used as a great matrix for catalase enzyme in various industrial applications.

Source link: https://pubag.nal.usda.gov/catalog/7417206


Probing the role of Val228 on the catalytic activity of Scytalidium catalase

The crystal framework of Scytalidium catalase exposes the existence of three connected channels giving access to the outside like various other catalases reported so far. When Val228 was altered to either Ala, Gly or Ser, we observed a significant reduction in catalytic performance in all mutants with the exception of an exceptional boost in oxidase activity. The decreased catalytic efficiencies are identified in terms of the constraint of hydrogen peroxide as electron acceptor in the active centre resulting from the opening of lateral channel inlet by introducing the smaller side chain deposits. The crystal structures of V228C and V228I were figured out at 1. 41 and 1. 47 Å resolution, specifically. The side channels of the V228C and V228I offered an extensively similar chain of prepared waters to that observed for wild-type enzyme.

Source link: https://pubag.nal.usda.gov/catalog/7349636


Structural and functional analyses of a novel manganese-catalase from Bacillus subtilis R5

Catalases militarize the disintegration of hydrogen peroxide into water and oxygen. We describe below molecular cloning and expression in Escherichia coli of a suppositious manganese-catalase genetics from mesophilic bacterium, Bacillus subtilis R5. The absorption ranges and nonsignificant inhibition by salt azide showed that it is a manganese-catalase. CatBₛᵤ showed highest task at pH 8. 0 and 55 ° C. Furthermore, the active site and metal binding deposits in CatBₛᵤ were anticipated by homology modelling and molecular docking. To the ideal of our knowledge, this is the first characterization of a manganese-catalase from genus Bacillus.

Source link: https://pubag.nal.usda.gov/catalog/7313838


Facile synthesis of catalase@ZIF-8 composite by biomimetic mineralization for efficient biocatalysis

The CAT@ZIF-8 composites showed a much lower Kₘ value and much better enzyme task than those of free CAT, exhibiting great security versus chemical hydrolysis and healthy protein denaturation under severe conditions. The inhibitory results of chemicals such as pH, temperature level, solvent and storage at area temperature level on the task of free and debilitated catalase enzyme were checked out. The CAT@MOF created is guaranteeing for the effective elimination of H ₂ O ₂ under rough problems.

Source link: https://pubag.nal.usda.gov/catalog/7389947


A novel pathogenicity determinant hijacks maize catalase 1 to enhance viral multiplication and infection

Maize chlorotic mottle infection can create lethal death in maize when it coinfects with a virus in the Potyviridae family. Here we show that the P31 protein of MCMV is very important for viral build-up and essential for symptom development. Ectopic expression of P31 utilizing foxtail mosaic infection or potato virus X caused necrosis in systemically infected maize or Nicotiana benthamiana leaves. Maize catalases were shown to communicate with P31 in yeast and in planta. P31 attenuated the expression of salicylic acid responsive pathogenesis‐related genes by hindering catalase task throughout MCMV infection.

Source link: https://pubag.nal.usda.gov/catalog/7330428


Biophysical interaction between self-assembled branched DNA nanostructures with bovine serum albumin and bovine liver catalase

Herein, we report the biophysical interaction in between self-assembled bDNA nanostructure with flowing healthy protein bovine product albumin and cellular enzyme bovine liver catalase. With a rise in bDNA focus as much as 100 nM, no substantial modification in absorbance and CD ranges was observed for both BLC and BSA which recommends structural security and untouched additional conformation of healthy proteins in visibility of bDNA. The thermal melting study recommends a greater Tm value for healthy proteins in visibility of bDNAmix which demonstrates that communication with bDNAmix raises the thermal security of healthy proteins. Jointly these data recommend that self-assembled DNA nanostructure might bind to BSA for assisting in blood circulation in plasma or binding to intracellular healthy proteins like BLC for stablizing, nonetheless the secondary conformation of healthy protein or catalytic activity of enzyme is unaltered in presence of bDNA nanostructure.

Source link: https://pubag.nal.usda.gov/catalog/7283508


Changes in transcript levels of cassava superoxide dismutase and catalase during interaction with Phytopythium sp.

Among the biotic aspects affecting the manufacturing of cassava, root rot is one of the most severe illness worldwide. Therefore, four SOD and 3 CAT genetics were picked from the cassava genome offered in the Phytozome Database. Comparative sequence evaluation revealed high identification in between the deduced MeSOD and MeCAT proteins with SODs and CATs from GenBank Database. Additionally, phylogenetic evaluation revealed that MeCuZnSOD1 and MeCuZnSOD3 healthy proteins were connected to SOD [ Cu-- Zn] 2 from Hevea brasiliensis, while MeCuZnSOD2 was close to SOD [Cu-- Zn] from Jatropha curcas. The outcomes revealed phylogenetic closeness of MeCAT2 and MeCAT3 with CAT isozyme 2, while MeCAT1 was close to CAT isozyme 1, both from H. brasiliensis. was able to reduce the expression of MeSOD genetics at early stages of infection, while at 48 h after vaccination cassava responded by raising the expression of the MeCuZnSOD3 gene.

Source link: https://pubag.nal.usda.gov/catalog/7279442


Designing ultrafine PdCo alloys in mesoporous silica nanospheres with peroxidase-like activity and catalase-like activity

The aberration-corrected transmission electron microscopy analysis confirmed that the cyanogel forerunner in the mesoporous silica nanospheres was converted to PdCo alloy in NH ₃ at a high temperature level. Utilizing glutathione as the model analyte, the prospective application of PdCo@MSNs in GSH detection from intricate cell media was confirmed using colorimetric assay. The ultrafine alloy size, double mimetic activities, and bountiful loading space of PdCo@MSNs make them promising not just in scientific diagnosis yet in getting over hypoxia-induced photodynamic therapy resistance in tumor treatment.

Source link: https://pubag.nal.usda.gov/catalog/7302558


Interaction of artemisinin protects the activity of antioxidant enzyme catalase: A biophysical study

In today research study, for the very first time we have demonstrated the safety function of widely known anti-malarial medication Artemisinin on the moment and temperature-induced deterioration of bovine liver catalase task. Molecular docking studies recommended certain binding of ART on BLC with heme team user interface which was further sustained by cyclic voltammetry and vibrant light spreading research. The stablizing of BLC in existence of ART was moderated through developing a BLC-ART facility with lowered and changed electrochemical height and enhanced hydrodynamic diameter. However, the safety duty of ART was accepted from the enhanced thermal security and raised Tₘ value of BLC in presence of ART at greater temperature levels. Our outcomes uncover the mechanism of interaction between ART with BLC and suggest the protective role of ART in the direction of spatiotemporal change of BLC by preventing the molecular and structural adjustment in BLC.

Source link: https://pubag.nal.usda.gov/catalog/7241705


Fluorinated chitosan-mediated intracellular catalase delivery for enhanced photodynamic therapy of oral cancer

Upon straightforward mixing, FC-Ce6 and catalase co-assemble to form stable nanoparticles, which show a significantly boosted cross-membrane infiltration capacity compared with catalase alone or nonfluorinated CS-Ce6/ catalase nanoparticles. Under catalase catalysis, a high concentration of intracellular H ₂ O ₂ can be changed into O ₂. Our research study recommends an efficient intracellular catalase shipment system to get rid of hypoxia for boosted PDT against oral cancer.

Source link: https://pubag.nal.usda.gov/catalog/7273434

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions