Catalase - Crossref

Molecular Basis for the Interaction of Catalase with D-Penicillamine : Rationalization of some of its Deleterious Effects

We propose that D-Pen could stimulate catalase activity in hemoprotein metabolism and catalase involvement in cellular H2O 2 redox signaling, thus dropping H 2 O 2 levels. Initially, D-Pen reacts with native catalase and/or iron metal ions, which are used to mimic non heme iron overload in long-term treated WD patients, in order to produce thiyl radicals. Through compound I formation then reduction, then, either H 2 O 2 unexpectedly responds to produce compound II or both aforementioned reactive oxygen species, enters the compound II generation through compound I formation and removal. These findings support findings that D-Pen could alter H 2 O 2 redox homeostasis by transient but revolving catalase inactivation, which may help to account for certain deleterious effects associated with this therapeutic agent, as described.

Source link: https://doi.org/10.1101/2021.09.16.460603

Interaction of human erythrocyte catalase with air – water interface in cryoEM

Abstract in Fourier space One of the main objectives of single-particle cryo-microscopy is to find a uniform pattern of particle orientations in order to ensure that the three-dimensional structure has isotropic resolution. Protein molecules' interaction with the air-u2013water interface on both sides of the thin film of liquid that is produced prior to plunge-freezing to liquid ethane is a common issue. The interaction of human erythrocyte catalase with the air-u2013water interface is investigated and minimized by the addition of such detergents in this paper.

Source link: https://doi.org/10.1093/jmicro/dfab037

Association of Catalase Gene Polymorphisms with Idiopathic Nephrotic Syndrome in a Chinese Pediatric Population

Result Findings There were no significant differences between INS patients and controls for the allele and genotype frequencies of the CAT SNVs, despite the fact that no significant differences were found between INS patients and controls. Patients with C allele of CAT rs769217 were at a greater risk of experiencing steroid-dependent nephrotic syndrome than the steroid-sensitive nephrotic syndrome patients. Conclusion Our results show that genetic variations in CAT were unlikely to give susceptibility to INS in Chinese children, but that the CAT's C allele of the rs769217 polymorphism showed a strong relationship with steroid-dependent responses in Chinese INS children.

Source link: https://doi.org/10.1093/labmed/lmac062

The Role of Catalase C262T Gene Polymorphism in the Susceptibility and Survival of Cancers

This study was designed to summarize the general relationships between CAT C262T polymorphism and cancer risk or survival. Although no associations were established between the polymorphism and Asian or mixed populations, the results revealed a strong correlation between CAT C262T polymorphism and cancer risk among Caucasians, and an elevated risk of prostate cancer and increased risk among Caucasians, according to subgroup studies. In conclusion, the CAT C262T polymorphism may be a candidate marker for cancer risk with type-specific and population-specific effects but not a primary prognostic factor for cancer survival.

Source link: https://doi.org/10.1038/srep26973

Dual promoters of the major catalase (KatA) govern distinct survival strategies of Pseudomonas aeruginosa

This dismantling of katA's dual promoters sheds light on KatA's role in stress resistance in both proliferative and growth-restrictive environments, providing a glimpse into the legislative implications of the major catalase's survival tactics.

Source link: https://doi.org/10.1038/srep31185

THE EFFECT OF PURIFIED AMOUNT OF TRITERPENE GLYCOSIDES AND THEIR ENRICHED EXTRACT FROM LEAVES OF SILPHIUM PERFOLIATUM L. ON THE GERMINATION OF SEEDS OF WINTER WHEAT AND THE ACTIVITY OF CATALASE IN THEM

The treatment of seeds with PATG solutions at concentrations of 0. 2 and 0. 4 percent increases the severity of their swelling within 48 hours after soaking by 3. 2 percent compared to the control, which results in the achievement of the threshold levels necessary for metabolic processes to be initiated. For the first time, the stimulating effect of TG preparations on catalase activity in germinating seeds of winter wheat was demonstrated. The findings show that TG isolated from leaves of S. persuade can be considered as a promising growth promoters for pre-sowing treatment of winter wheat seeds.

Source link: https://doi.org/10.14258/jcprm.2021028275

Moonlighting of Helicobacter pylori catalase protects against complement-mediated killing by utilising the host molecule vitronectin

Despite H. pylori's inflammatory immune responses, the bacterium is still able to establish long-term infections. The purpose of this research was to identify a receptor in H. pylori that binds Vn and determine the relationship between virulence and the interaction, according to the authors. KatA shielded H. pylori from complement-mediated death in a Vn-dependent manner, according to a VN-dependent manner. The virulence factor KatA is a Vn-binding protein that moonlights on the surface of H. pylori to promote host innate immunity by bacteria.

Source link: https://doi.org/10.1038/srep24391

Epigenetic Silencing of the Key Antioxidant Enzyme Catalase in Karyotypically Abnormal Human Pluripotent Stem Cells

Abstract: Epigenomic regulation is likely to be instrumental in the maintenance of human pluripotent stem cells' genomic integrity, however, the exact mechanisms are uncertain. Before and after spontaneous changes to abnormal karyotypes and in correlation with cancer cells, we investigated the epigenomes and transcriptomes of human pluripotent stem cells.

Source link: https://doi.org/10.1038/srep22190

Sulfheme formation during homocysteine S-oxygenation by catalase in cancers and neurodegenerative diseases

homocysteine first reacts with native catalase and/or redox-active transition metal ions to produce thiyl radicals that mediate compound II formation, a temporarily inactive state of the enzyme. By the production of unusual Fe sulfonium, Then, the ferryl center of compound II, steps forward in the extraordinary S-oxygenation of homocysteine to engender the corresponding sulfenic acid species that further participates in the prosthetic heme transformation by the synthesis of unusual Fe sulfonium. In addition, our ex cellulo studies on cancer cells, models of neurodegenerative disorders, and ulcerative colitis suggest the possibility of this condition in a subset of cancer cells, as well as in a cellular model of Parkinsonu2019s disease. Our findings extend the range of heme modifications produced by biological compounds and point out another determinant feature of lowered homocysteine levels that could play a role in these diseases' aetiology.

Source link: https://doi.org/10.1038/ncomms13386

Catalase Gene Therapy in Experimental Optic Neuritis: Immunocytochemistry Study

Catalase is one of the few important antioxidant enzymes that converts hydrogen peroxide to nontoxic H 2 O + O 2. Although it has already been reported that in vitro human endothelial cells show a 2-4 fold rise in catalase levels within 24 hours after the administration of the viral-catalase cDNA complex, there are no data available regarding in vivo human catalase gene transfer.

Source link: https://doi.org/10.1017/s1431927600025678

* 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