The ATPase activity of Hsp82 is essential, and two mutations known to disrupt this activity are Hsp82-E33A, which disrupted ATP hydrolysis, and Hsp82-D79N, which disrupted ATP binding. Finally, although the presence of heterodimers between WT Hsp82 and mutant Hsc82 cannot be excluded, dramatic differences between WT and mutant forms of Hsc82 may be observed despite the presence of WT Hsp82 in cell extracts. Biol. 21:7569-7575. ↵ Ali, M. M., S. M. Roe, C. K. Vaughan, P. Meyer, B. Panaretou, P. W. Piper, C. Prodromou, and L. H. Pearl. 2006. Crystal structure of an Hsp90-nucleotide-p23/Sba1 closed chaperone complex. Point mutations were constructed using site-directed mutagenesis (QuikChange; Stratagene, La Jolla, CA) or other PCR-based methods. Acad. Sci. USA 93:13937-13942. ↵ Mayr, C., K. Richter, H. Lilie, and J. Buchner. 2000. Cpr6 and Cpr7, two closely related Hsp90-associated immunophilins from Saccharomyces cerevisiae, differ in their functional properties. J. Biol.
Relationship of cochaperone interaction to overall Hsp90 function.Our study provides novel information linking the conformational changes that occur during the ATPase cycle of Hsp90 to cochaperone interactions. Biol. 18:3727-3734. ↵ Flom, G., J. Weekes, and J. L. Johnson. 2005. Novel interaction of the Hsp90 chaperone machine with Ssl2, an essential DNA helicase in Saccharomyces cerevisiae. Наша миссия — раскрыть естественную красоту каждой женщины.Развернуть+.. И мы с удовольствием это делаем, предлагая высококачественные продукты на основе растительных компонентов. View larger version: FIG. 5. Interaction of mutant Hsc82 with Sti1, Sba1, and Cpr6 in the presence of ATP plus an ATP-regenerating system. Удобство покупателей – один из приоритетов компании. Мы предлагаем несколько способов доставки и оплаты, чтобы каждый мог выбрать наиболее подходящий вариант.
The Coomassie blue-stained band corresponding to His-Hsc82 is shown in the upper panel, and the lower panels represent immunoblot analysis using antibodies against the indicated proteins. Cell Stress Chaperones 3:118-129. CrossRefMedlineGoogle Scholar ↵ Dollins, D. E., R. M. Immormino, and D. T. Gewirth. 2005. Structure of unliganded GRP94, the endoplasmic reticulum Hsp90. Basis for nucleotide-induced conformational change. J. Biol. Because both mutations disrupt the essential in vivo functions of Hsc82 (Table 1), this experiment was conducted with cells coexpressing WT untagged Hsp82 (Fig. 1B). His-Hsc82 complexes were isolated as described above. Nickel-bound protein complexes were separated by SDS-PAGE and analyzed as described in the legend to Fig. 1. B. As above, except that WT His-Hsc82, His-Hsc82-T22I, or His-T101I was isolated from cells coexpressing WT untagged Hsp82, since hsc82-T22I and hsc82-T101I confer a lethal phenotype.