Enzyme-responsive artificial chaperone system with amphiphilic amylose primer.

An enzyme-responsive artificial chaperone system which employs an amphiphilic amylose primer (dodecyl maltopentaose, C12-MP) as a surfactant and phosphorylase b was designed to enable protein refolding. Effective refolding of carbonic anhydrase B after both heat denaturation (70 degrees C for 10min) and guanidine hydrochloride (6M) denaturation was observed by controlled association between the protein molecules and the C12-MP primer micelle through an enzymatic reaction.

Overexpression of CIN85 suppresses the growth of herpes simplex virus in HeLa cells.

The adaptor protein CIN85 is widely distributed in different tissues and has three Src homology 3 (SH3) domains, a proline-rich region (PRR), and a coiled-coil domain. During studies on the function of CIN85, it was reported to form a complex with herpes simplex virus 1 (HSV-1) infected cell protein 0 (ICP0), which plays a key role in enabling viral replication. Here, we demonstrate that plaque formation by HSV-1 is reduced on HeLa cells expressing CIN85 ectopically.

Cell separation in microcanal coated with electrically charged phospholipid polymers.

To separate the cell population in whole blood using microcanal, the surface was covered with a polyion complex (PIC) composed of electrically charged phospholipid polymers. The phospholipids polymers were prepared by the polymerization of 2-methacryloyloxyethyl phosphorylcholine (MPC) and n-butyl methacrylate with 3-(methacryloyloxypropyl)-trimethyl ammonium iodide as the cationic unit or potassium 3-methacryloyloxypropyl sulfonate as the anionic unit. The PIC was formed at the solid-liquid interface, that is, first, the cationic polymer was coated on the substrate and an aqueous solution containing the anionic polymer with different concentrations was applied to the polymer-coated substrate.

CIN85 associates with TNF receptor 1 via Src and modulates TNF-alpha-induced apoptosis.

CIN85 is a multidomain protein that associates with receptors carrying tyrosine kinase domains. Here we report that it is also a component of the signaling complex associated with tumor necrosis factor receptor 1 (TNFR1), which lacks a tyrosine kinase domain. This was established by showing that CIN85 was co-precipitated with TNFR1, TRADD, cIAP-1 and TARF1/2, but not with FADD, RIP, caspase-8 or TRAF6.

Thermoresponsive controlled association of protein with a dynamic nanogel of hydrophobized polysaccharide and cyclodextrin: heat shock protein-like activity of artificial molecular chaperone.

Dynamic CHP-CD nanogels, which consisted of a self-assembly of cholesteryl-group-bearing pullulan (CHP) and beta-cyclodextrin (CD), were characterized by SEC and SEC-MALS methods. The nanogels prevented the thermal aggregation of carbonic anhydrase B (CAB) by selective trapping of the heat-denatured protein. After the complex between the CHP-CD nanogels and CAB was cooled, the enzyme activity of CAB spontaneously recovered upon release from the complex.

Oligomer preparation from hexane by radical polyaddition with bis(alpha-trifluoromethyl-beta,beta-difluorovinyl) terephthalate.

Polymer preparation from hexane as a starting material by radical polyaddition with bis(alpha-trifluoromethyl-beta,beta-difluorovinyl) terephthalate [CF(2)=C(CF(3))OCOC(6)H(4)COO-C(CF(3))=CF(2)] was investigated to afford polymers bearing a molecular weight of as high as 5.5 x 10(3), and the polyaddition mechanism including 1,5-radical shift mechanism was proposed.

Radiation-induced reactions via the lowest excited states in cinnamic acid crystals.

Radiation-induced reactions of cinnamic acid derivatives have been examined and compared with photoreactions in the crystalline state; all the reaction products were exactly the same as those of the photoreactions, indicating that the reactions proceed only via the lowest excited state to give [2 + 2] cycloadducts, E/Z isomerization products, or starting molecules.