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Potential of the Complex to Produce 4-Hydroxy-3-Methyl-2-Alkyquinolines.
Front Cell Infect Microbiol
November 2019
Institut Armand Frappier, Institut National de la Recherche Scientifique, Laval, QC, Canada.
A few species, especially , and , are known to produce and release various 4-hydroxy-3-methyl-2-alkylquinolines (HMAQs), a family of molecules analogous to the 4-hydroxy-2-alkylquinolines [aka 2-n-alkyl-4(1)-quinolones] of , which include the quinolone signal (PQS). However, while these exoproducts play several roles in virulence and survival, the available literature is very limited on their distribution and function in . In this perspective article, we studied the distribution of the operon, which encodes the enzymes involved in the biosynthesis of HMAQs, in the complex (Bcc) group.
View Article and Find Full Text PDFThe effect of neat ionic liquid on the folding of short peptides.
Chem Commun (Camb)
July 2011
Department of Chemistry, The College of New Jersey, 2000 Pennington Rd., Ewing, NJ 08628, USA.
Using circular dichroism spectroscopy, we show evidence of unusual folding behaviour for several designed peptides in neat ionic liquid. Helical peptides, AKA(2) and Trp-cage, exhibit heat-induced folding, with stable helical structure persisting to 96 °C, whereas the β-hairpin Trpzip4 is destabilized by the neat [C(4)mpy][Tf(2)N].
View Article and Find Full Text PDFProtein folding in a reverse micelle environment: the role of confinement and dehydration.
J Chem Phys
February 2011
Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA.
Characterization of the molecular interactions that stabilize the folded state of proteins including hydrogen bond formation, solvation, molecular crowding, and interaction with membrane environments is a fundamental goal of theoretical biophysics. Inspired by recent experimental studies by Gai and co-workers, we have used molecular dynamics simulations to explore the structure and dynamics of the alanine-rich AKA(2) peptide in bulk solution and in a reverse micelle environment. The simulated structure of the reverse micelle shows substantial deviations from a spherical geometry.
View Article and Find Full Text PDFTechniques for colorectal anastomosis.
World J Gastroenterol
April 2010
Discipline of Surgery, School of Medicine, James Cook University, Clinical School 1MB52, Angus Smith Dr, Douglas, Townsville, QLD 4811, Australia.
Colorectal anastomotic leak remains one of the most feared post-operative complications, particularly after anterior resection of the rectum with, the shift from abdomino-peritoneal resections to total mesorectal excision and primary anastomosis. The literature fails to demonstrate superiority of stapled over hand-sewn techniques in colorectal anastomosis, regardless of the level of anastomosis, although a high stricture rate was noted in the former technique. Thus, improvements in safety aspects of anastomosis and alternatives to hand-sewn and stapled techniques are being sought.
View Article and Find Full Text PDF[Experience with using anterior resections in the surgery of rectum].
Vestn Khir Im I I Grek
February 2010
A retrospective analysis of direct results of anterior resections of the rectum fulfilled for cancer is presented. The patients were divided into 3 groups according to the methods of forming colorectal anastomoses: manual nodular, compression-mechanical method using apparatus AKA-2, 4 and a compressive method with apparatuses on the basis of the effect of memory of the form in the titanium nikelide alloy. Advantages of using compressive apparatuses are shown as well as the reliability of compressive colorectal anastomoses.
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