Directional Self-assembly in Archaerhodopsin-Reconstituted Phospholipid Liposomes

Abstract

This paper reports, for the first time, that Archaerhodopsin-4 (AR4) could be reconstituted into phospholipid liposomes by self-assembly. AR4 is a new membrane protein isolated from halobacteria H.sp. xz515 in a salt lake of Tibet, China. This is a bacteriorhodopsin (bR) like protein, function as a light-driven proton pump. Experimental measurements verified that similar to bR, AR not only remains its biological activity in proteoliposome, but also keeps a preferred orientation in self-assembly.

Metal–Organic Framework Supported Palladium Nanoparticles: Applications and Mechanisms

“…Although the above mechanisms are thought to be applicable to a large proportion of NCs, researches find that Pd‐based bimetallic NP–embedded MOFs can greatly improve the catalytic activity 11c,16. A series of crown‐jewel Pd‐M ( M = Ni, Fe, Co, Ag, and Cu) bimetallic NPs supported on MOFs were successfully fabricated, where Pd NPs served as the crown and the transition metal atoms M acted as jewels to decorate the Pd NPs11b,c,13,16,17 Chen et al11b prepared the Pd^Ni‐in‐UiO‐67 catalysts via a hydride‐induced reduction strategy to catalyze hydrogenation of nitrobenzene, and the reaction pathway is presented in Figure . It was found that the catalytic efficiency of Pd^Ni‐in‐UiO‐67 for nitrobenzene hydrogenation was 2.2 times greater than that of Pd NPs‐in‐UiO‐67 catalysts.…”

Amphiphilic block copolymers significantly influence functions of bacteriorhodopsin in water

“…Like some other retinalcontaining membrane proteins, [11][12][13][14][15][16][17][18][19] BR functions as a lightdriven proton pump, 20,21 and is an excellent model protein for photoresponsive supramolecular assemblies. [22][23][24][25][26] The photoelectric response of BR is accompanied by a photochromic response. Upon absorption of light, the configuration of the retinal is changed from the all-trans to 13-cis, which triggers a remarkable series of intermediates and ultimately results in the transient deprotonation and reprotonation of the retinal Schiff base and a net proton transport from the cytoplasmic to the extracelluar side.…”

Transformation of thiols to disulfides via an oxidant-free radical pathway on the zeolite ETS-10

“…Disulfide bonds, including symmetrical and unsymmetrical bonds, are pivotal structural motifs in natural compounds, biological agents and drugs, as well as in advanced materials. In recent decades, various feasible strategies have been developed for the synthesis of symmetrical disulfides, such as thiolysis, 1 reductive dimerization of thiocyanates, 2 nucleophilic substitution of S–H bonds, 3 and reductive coupling of sulfonyl chlorides. 4 However, the formation of byproducts arising from leaving groups is inevitable in these strategies (Scheme 1a).…”