Results 61 to 70 of about 118,118 (316)

Cell Propagation of Cholera Toxin CTA ADP-Ribosylating Factor by Exosome Mediated Transfer [PDF]

, 2018
In this study, we report how the cholera toxin (CT) A subunit (CTA), the enzyme moiety responsible for signaling alteration in host cells, enters the exosomal pathway, secretes extracellularly, transmits itself to a cell population.
Boussadia, Zaira, Carollo, Maria, Fabbri, Alessia, Falchi, Mario, Fecchi, Katia, Fiani, Maria Luisa, Gallina, Angelo, Palermo, Angela, Parisi, Sofia, Pasquini, Luca, Sargiacomo, Massimo, Zanetti, Cristiana   +11 more
core   +1 more source

KLK1 as an Epithelial‐Specific Brake Inhibits Colorectal Tumorigenesis by Suppressing B1R‐Mediated Fibroblast Phenotypic Transition

Advanced Science, EarlyView.
KLK1 downregulation disrupts the intestinal mucosal barrier and impairs kallikrein‐kinin signaling, thereby reducing Lys‐des‐Arg9‐BK production. This enhances B1R activation on ADAMDEC1⁺ fibroblasts, promoting inflammation and extracellular matrix (ECM) remodeling. The resulting iCAFs promote colorectal cancer progression, highlighting a novel KLK1‐B1R
Lisha Zhou, Meijing Wang, Shunji Liu, Limei Gu, Shijia Liu, Qianming Du, Tianyi Zhang, Yinuo Ma, Lixin Zhao, Jiaming Wang, Qiang Xu, Tingsheng Ling, Haibo Cheng, Hongqi Chen, Yang Sun   +14 more
wiley   +1 more source

A procedure for the determination of proteolytic activity [PDF]

, 1950
The difficulties introduced by the desire to maintain a constant pH during an enzyme-catalyzed hydrolysis of peptide-like substrates and at the same time to determine the extent of hydrolysis by an acid-base titration have been pointed out (1), but to ...
Iselin, Beat M., Niemann, Carl
core  

Giardia Cyst Wall Protein 1 Is a Lectin That Binds to Curled Fibrils of the GalNAc Homopolymer [PDF]

, 2010
The infectious and diagnostic stage of Giardia lamblia (also known as G. intestinalis or G. duodenalis) is the cyst. The Giardia cyst wall contains fibrils of a unique β-1,3-linked N-acetylgalactosamine (GalNAc) homopolymer and at least three cyst wall ...
Bullitt, Esther, Carpentieri, Andrea, Chatterjee, Aparajita, Costello, Catherine E., Ratner, Daniel M., Robbins, Phillips W., Samuelson, John   +6 more
core   +5 more sources

Utilizing Proteolytic‐Resistant Nano‐Short Peptide Based on Naphthyl Tail‐Anchored to Combat Bacterial Infections

Advanced Science, EarlyView.
Antimicrobial peptides (AMPs) show potential as alternatives to antibiotics for bacterial infections; however, their susceptibility to proteases limits wider application. In this study, N4 nanofibers are constructed by integrating anti‐enzymolysis motif into the self‐assembly system triggered by naphthyl‐anchored.
Xi Yan, Yinfeng Lyu, Yi Liu, Jianping Ren, Yue Zhao, Licong Zhang, Anshan Shan   +6 more
wiley   +1 more source

The stereospecificity of α-chymotrypsin [PDF]

Biochemical Journal, 1968
1. The rates of deacylation of acyl-α-chymotrypsins in which the hydrogen-bonding capacity of the acylamino group of the substrate has been systematically removed were measured. 2. The ratio of deacylation rates of l- and d-acyl-enzymes is found to depend largely on the existence in the substrate of an amido –NH– group. 3. The data presented agree with
J. R. Knowles, D. W. Ingles
openaire   +3 more sources

The minimal structure containing the band 3 anion transport site. A 35Cl NMR study [PDF]

, 1985
35Cl NMR, which enables observation of chloride binding to the anion transport site on band 3, is used in the present study to determine the minimal structure containing the intact transport site.
Chan, Sunney I., Falke, Joseph J., Kanes, Katherine J.   +2 more
core  

Inhibition of pancreatic cholesterol esterase reduces cholesterol absorption in the hamster [PDF]

, 2004
BACKGROUND: Pancreatic cholesterol esterase has three proposed functions in the intestine: 1) to control the bioavailability of cholesterol from dietary cholesterol esters; 2) to contribute to incorporation of cholesterol into mixed micelles; and 3) to ...
Contos, Linda M, Deck, Lorraine M, Heidrich, John E, Hunsaker, Lucy A, Vander Jagt, David L   +4 more
core   +2 more sources

K29‐Linked Ubiquitination of Transcription Regulators Controls Cell Proliferation in the Unfolded Protein Response

Advanced Science, EarlyView.
Under endoplasmic reticulum stress, cells activate the unfolded protein response (UPR). During the UPR, the cohesin complex at the promoter of cell proliferation‐related genes undergoes K29‐linked ubiquitination, recruiting the cohesin release factor WAPL to release cohesin, leading to transcriptional downregulation and inhibition of cell growth ...
Qiushuang Zhang, Xucong Teng, Yicong Dai, Yuncong Wu, Hongwei Hou, Jinghong Li   +5 more
wiley   +1 more source

Screening and Purification of a Chymotrypsin Inhibitor from Entrolobium Saman Seeds

Sultan Qaboos University Journal for Science, 2010
A chymotrypsin inhibitor was isolated and purified from the seeds of Enterolobium saman  (Leguminaceae family) by extraction with 100 mM phosphate buffer, heat treatment, ammonium sulphate precipitation, ion-exchange chromatography on DEAEcellulose and ...
Maher Ali. Maqtari, A.B. Mohamed. Saad
doaj   +1 more source