77471-41-1Relevant academic research and scientific papers
Activity-Based Probe for Screening of High-Colibactin Producers from Clinical Samples
Hirayama, Yuichiro,Tsunematsu, Yuta,Yoshikawa, Yuko,Tamafune, Ryota,Matsuzaki, Nobuo,Iwashita, Yuji,Ohnishi, Ippei,Tanioka, Fumihiko,Sato, Michio,Miyoshi, Noriyuki,Mutoh, Michihiro,Ishikawa, Hideki,Sugimura, Haruhiko,Wakabayashi, Keiji,Watanabe, Kenji
, p. 4490 - 4494 (2019)
While high-colibactin-producing Escherichia coli is thought to be associated with colorectal oncogenesis, this study is complicated part due to an inability to isolate colibactin adequately. Here, we created fluorescent probes activated by ClbP, the colibactin-maturing peptidase, to identify high-colibactin-producing strains. Our probe served as a valuable clinical diagnostic tool that allowed simple high-throughput diagnostic screening of clinical samples. Furthermore, the probe also allowed identification of high-colibactin producers that would help advance our understanding of colibactin biosynthesis.
A judgment on postmortem aging in Longissimus dorsi based on a peptide substrate library
Onitsuka, Eiichiro,Okumura, Tomoyuki,Murakami, Hiroshi,Nishino, Norikazu,Morimatsu, Fumiki
, p. 2836 - 2843 (2007/10/03)
We attempted to develop a method to determine easily and effectively the degree of postmortem aging of pork longissimus dorsi (LD) by measuring the activity of proteases in the LD using fluorogenic peptide substrates. LD was used to measure the change with time in the protease activity detected with these substrates. Determining the variations within the LD muscles, strong positive correlations were found between changes in hardness and fluorescence intensities against Ac-Ala-MCA, Ac-Met-MCA, Ac-Ser-MCA, Ac-Thr-MCA, and Ac-Ala-Phe-MCA (P 0.005), and strong negative correlations were found between changes in total amounts of free amino acids and Ac-Ala-MCA, Ac-Met-MCA, Ac-Ser-MCA, Ac-Thr-MCA, and Ac-Ala-Phe-MCA (P 0.001). Negative correlations were also observed between changes in the amounts of free Ala, Arg, Lys, Leu, Met, Phe, and Tyr and the fluorescence intensities against Ala, Arg, Lys, Leu, Met, Phe, and Tyr-MCA respectively (P 0.001).
