Self-Assembled Histidine Acid Phosphatase Nanocapsules in Ionic Liquid [BMIM][BF4] as Functional Templates for Hollow Metal Nanoparticles

Langmuir ◽  
2012 ◽  
Vol 28 (28) ◽  
pp. 10389-10397 ◽  
Author(s):  
Sarvesh K. Soni ◽  
P. R. Selvakannan ◽  
Suresh K. Bhargava ◽  
Vipul Bansal
Keyword(s):  
Ionic Liquid ◽  
Acid Phosphatase ◽  
Metal Nanoparticles ◽  
Histidine Acid Phosphatase ◽  
Self Assembled ◽  
Hollow Metal

scholarly journals Optimization of transition metal nanoparticle-phosphonium ionic liquid composite catalytic systems for deep hydrogenation and hydrodeoxygenation reactions

2015 ◽  
Vol 17 (3) ◽  
pp. 1597-1604 ◽  
Author(s):  
Abhinandan Banerjee ◽  
Robert W. J. Scott
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transition Metal ◽  
Metal Nanoparticles ◽  
Metal Nanoparticle ◽  
Catalytic Systems ◽  
Phosphonium Ionic Liquid

Stable metal nanoparticles in tetraalkylphosphonium ionic liquids can catalyze hydrogenations, as well as phenol hydrodeoxygenation, owing to presence of adventitious borates.

scholarly journals N-Glycosylation Improves the Pepsin Resistance of Histidine Acid Phosphatase Phytases by Enhancing Their Stability at Acidic pHs and Reducing Pepsin's Accessibility to Its Cleavage Sites

2015 ◽  
Vol 82 (4) ◽  
pp. 1004-1014 ◽  
Author(s):  
Canfang Niu ◽  
Huiying Luo ◽  
Pengjun Shi ◽  
Huoqing Huang ◽  
Yaru Wang ◽  
...  
Keyword(s):  
Acid Phosphatase ◽  
Biochemical Characterization ◽  
Animal Feed ◽  
Glycosylation Site ◽  
Site Directed Mutagenesis ◽  
Acidic Ph ◽  
Cleavage Sites ◽  
Ph Optimum ◽  
Content Type ◽  
Histidine Acid Phosphatase

ABSTRACTN-Glycosylation can modulate enzyme structure and function. In this study, we identified two pepsin-resistant histidine acid phosphatase (HAP) phytases fromYersinia kristensenii(YkAPPA) andYersinia rohdei(YrAPPA), each having anN-glycosylation motif, and one pepsin-sensitive HAP phytase fromYersinia enterocolitica(YeAPPA) that lacked anN-glycosylation site. Site-directed mutagenesis was employed to construct mutants by altering theN-glycosylation status of each enzyme, and the mutant and wild-type enzymes were expressed inPichia pastorisfor biochemical characterization. Compared with those of theN-glycosylation site deletion mutants andN-deglycosylated enzymes, allN-glycosylated counterparts exhibited enhanced pepsin resistance. Introduction of theN-glycosylation site into YeAPPA as YkAPPA and YrAPPA conferred pepsin resistance, shifted the pH optimum (0.5 and 1.5 pH units downward, respectively) and improved stability at acidic pH (83.2 and 98.8% residual activities at pH 2.0 for 1 h). Replacing the pepsin cleavage sites L197 and L396 in the immediate vicinity of theN-glycosylation motifs of YkAPPA and YrAPPA with V promoted their resistance to pepsin digestion when produced inEscherichia colibut had no effect on the pepsin resistance ofN-glycosylated enzymes produced inP. pastoris. Thus,N-glycosylation may improve pepsin resistance by enhancing the stability at acidic pH and reducing pepsin's accessibility to peptic cleavage sites. This study provides a strategy, namely, the manipulation ofN-glycosylation, for improvement of phytase properties for use in animal feed.

Luminescent Ionic Liquid Crystals from Self-Assembled BODIPY Disulfonate and Imidazolium Frameworks

2010 ◽  
Vol 16 (24) ◽  
pp. 7134-7142 ◽  
Author(s):  
Jean-Hubert Olivier ◽  
Franck Camerel ◽  
Gilles Ulrich ◽  
Joaquín Barberá ◽  
Raymond Ziessel
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystals ◽  
Ionic Liquid Crystals ◽  
Self Assembled

Polypyrrole Nanostructures Self-Assembled in Magnetic Ionic Liquid as a Template

2008 ◽  
Vol 41 (8) ◽  
pp. 2886-2889 ◽  
Author(s):  
Jin-Yeol Kim ◽  
Jae-Taek Kim ◽  
Eun-Ah Song ◽  
Young-Kun Min ◽  
Hiro-o Hamaguchi
Keyword(s):  
Ionic Liquid ◽  
Magnetic Ionic Liquid ◽  
Self Assembled

scholarly journals Frontispiece: Alloying Behavior of Self-Assembled Noble Metal Nanoparticles

2016 ◽  
Vol 22 (38) ◽  
Author(s):  
Laura Kühn ◽  
Anne-Kristin Herrmann ◽  
Bogdan Rutkowski ◽  
Mehtap Oezaslan ◽  
Maarten Nachtegaal ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Self Assembled

Self-Assembled Exopolysaccharide Nanoparticles for Bioremediation and Green Synthesis of Noble Metal Nanoparticles

2017 ◽  
Vol 9 (27) ◽  
pp. 22808-22818 ◽  
Author(s):  
Chengcheng Li ◽  
Le Zhou ◽  
Hang Yang ◽  
Roujing Lv ◽  
Peilong Tian ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Noble Metal Nanoparticles ◽  
Self Assembled
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