Successful Control of Aggregation and Folding Rates during Refolding of Denatured Lysozyme by Adding N-Methylimidazolium Cations with Various N’-Substituents was written by Yamaguchi, Satoshi;Yamamoto, Etsushi;Tsukiji, Shinya;Nagamune, Teruyuki. And the article was included in Biotechnology Progress in 2008.Formula: C7H13ClN2 This article mentions the following:
The present study aimed to obtain more effective refolding agents and to understand the influence of their chem. structures on their function as refolding agents. To achieve these aims, we investigated the effects of a large variety of N’-substituted N-methylimidazolium chlorides on the oxidative refolding of lysozyme in a high throughput manner. Among the mols. examined, N-methylimidazolium cations with a short N’-alkyl chain, such as an N’-Et or N’-Bu chain, significantly enhanced the refolding yield compared to conventional refolding additives such as arginine hydrochloride and Triton X-100. Detailed kinetic analyses revealed that the effective cations selectively decreased the aggregation rate constant (kA) without any large decreases in the folding rate constant (kN). However, when the hydrophobicity of the N’-substituent of the cations was increased, the desirable properties of the short N’-alkyl chain-type cations for protein refolding were diminished. Furthermore, increases in the N’-alkyl chain length to an N’-octyl or N’-dodecyl chain drastically decreased the kA values, thereby increasing the ratio of kN to kA, despite the very small kN values and resulting in enhanced refolding yields. Thus, by tuning the chem. structure of the N’-substituents of N-methylimidazolium chloride, five effective refolding agents (N’-ethyl-, N’-propyl-, N’-butyl-, N’-pentyl- and N’-isobutyl-N-methylimidazolium chlorides) were successfully obtained, and the kinetic parameters of folding and aggregation during the refolding process could be controlled using three different modes. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8Formula: C7H13ClN2).
1-Methyl-3-propylimidazolium Chloride (cas: 79917-89-8) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. Imidazole based anticancer drug find applications in cancer chemotherapy. It is used as buffer component for purification of the histidine tagged recombinant proteins in immobilized metal-affinity chromatography (IMAC).Formula: C7H13ClN2
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem