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Comparative Analysis of the Enzymatic, Coagulant, and Neuromuscular Activities of Two Variants of Venom and Antivenom Efficacy.
Pharmaceuticals (Basel)
January 2025
Laboratory of Toxinology and Cardiovascular Research, University of Western São Paulo (UNOESTE), Presidente Prudente 19050-680, SP, Brazil.
We compared the enzymatic, coagulant, and neuromuscular activities of two variants (yellow-CDRy and white-CDRw) of venom with a sample of (CDT) venom and examined their neutralization by antivenom against CDT venom. The venoms were screened for enzymatic and coagulant activities using standard assays, and electrophoretic profiles were compared by SDS-PAGE. Neutralization was assessed by preincubating venoms with crotalic antivenom and assaying the residual activity.
View Article and Find Full Text PDFA novel USP4 inhibitor that suppresses colorectal cancer stemness by promoting β-catenin and Twist1 degradation.
J Transl Med
January 2025
State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, 510060, P. R. China.
Background: The high mortality rate of metastatic colorectal cancer (CRC) is primarily attributed to resistance to chemotherapy, where cancer stem cells (CSCs) play a crucial role. Deubiquitinating enzymes are essential regulators of CSC maintenance, making them potential targets for eliminating CSCs and overcoming chemotherapy resistance. This study aims to identify key deubiquitinating enzymes regulating CSCs and drug resistance of CRC.
View Article and Find Full Text PDFTMT-labelled quantitative proteomics reveals the mechanism of Rhodotorula mucilaginosa on proteolysis of dry-cured ham: Structural protein degradation, amino acid release and taste improvement.
Food Chem
January 2025
Zhejiang Key Laboratory of Intelligent Food Logistic and Processing; Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition; College of Food Science and Engineering, Ningbo University, Ningbo 315211, China. Electronic address:
To investigate the mechanism of Rhodotorula mucilaginosa on structural protein degradation and taste development of Jinhua ham, the effects of Rhodotorula mucilaginosa and Pichia kudriavzevii on proteolytic enzyme activities, surface hydrophobicity, myofibril microstructure, protein degradation, free amino acids and sensory attributes were investigated during the dry-ripening of Jinhua ham. The inoculation of Rhodotorula mucilaginosa EIODSF019 (RE) and Rhodotorula mucilaginosa XZY63-3 (RX) consistently exhibited higher proteolytic enzyme activities compared with Pichia kudriavzevii XS-5 (PK). The decrease of α-helix exposing more internal hydrophobic groups of myofibrillar proteins, contributed to higher surface hydrophobicity of RE compared with PK and RX.
View Article and Find Full Text PDFExpression of Recombinant Clostridial Neurotoxin by .
Microorganisms
December 2024
Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA.
Tetanus neurotoxins (TeNT) and botulinum neurotoxins (BoNTs) are closely related ~150 kDa protein toxins that together comprise the group of clostridial neurotoxins (CNTs) expressed by various species of . While TeNT is expressed as a single polypeptide, BoNTs are always produced alongside multiple non-toxic proteins that form a stabilizing complex with BoNT and are encoded in a conserved toxin gene cluster. It is unknown how evolved without a similar gene cluster and why complex-free TeNT is secreted as a stable and soluble protein by , whereas complexing proteins appear to be essential for BoNT stability in culture supernatants of .
View Article and Find Full Text PDFAnticoagulant Activity of the Polysaccharide Fromgonad of Abalone Ino: The Role of Conjugate Protein.
Foods
December 2024
National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
Few studies are concerned with the effect of the conjugat protein on the bioactivities of the abalone gonad polysaccharide (AGP). In this study, a series of treatments, including raw material (female and male) defatting, extraction temperature (25-121 °C), proteolysis, ultrafiltration, and ethanol precipitation, was conducted to investigate the role of the conjugate protein on AGP anticoagulant activity. All AGP extracts significantly prolonged activated partial thromboplastin time (APTT) and thrombin time (TT).
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