This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.We are continuing our studies on the structure and mechanism of molecular chaperone proteins which, broadly speaking, facilitate the correct folding, assembly and targeting of proteins and RNA molecules in cells. Systems that are currently under study include a 'prokaryotic proteasome'?a 850 kDa complex that is a simple homolog of the eukaryotic proteasome; a chaperone that facilitates folding and assembly of membrane proteins in bacteria; and a family of RNA chaperones/helicases that modulate RNA structure in cells. Combined with other biophysical studies, we are now examining substrate recognition properties of many of these proteins by characterizing target peptides or RNAs and co-crystallizing complexes for structure determination.
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