{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,20]],"date-time":"2025-07-20T03:28:29Z","timestamp":1752982109631},"reference-count":28,"publisher":"Oxford University Press (OUP)","issue":"13","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2007,7,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Motivation: The folding of many proteins in vivo and in vitro is assisted by molecular chaperones. A well-characterized molecular chaperone system is the chaperonin GroEL\/GroES from Escherichia coli which has a homolog found in the eukaryotic cytosol called CCT. All chaperonins have a ring structure with a cavity in which the substrate protein folds. An interesting difference between prokaryotic and eukaryotic chaperonins is in the nature of the ATP-mediated conformational changes that their ring structures undergo during their reaction cycle. Prokaryotic chaperonins are known to exhibit a highly cooperative concerted change of their cavity surface while in eukaryotic chaperonins the change is sequential. Approximately 70% of proteins in eukaryotic cells are multi-domain whereas in prokaryotes single-domain proteins are more common. Thus, it was suggested that the different modes of action of prokaryotic and eukaryotic chaperonins can be explained by the need of eukaryotic chaperonins to facilitate folding of multi-domain proteins.<\/jats:p>\n               <jats:p>Results: Using a 2D square lattice model, we generated two large populations of single-domain and double-domain substrate proteins. Chaperonins were modeled as static structures with a cavity wall with which the substrate protein interacts. We simulated both concerted and sequential changes of the cavity surfaces and demonstrated that folding of single-domain proteins benefits from concerted but not sequential changes whereas double-domain proteins benefit also from sequential changes. Thus, our results support the suggestion that the different modes of allosteric switching of prokaryotic and eukaryotic chaperonin rings have functional implications as it enables eukaryotic chaperonins to better assist multi-domain protein folding.<\/jats:p>","DOI":"10.1093\/bioinformatics\/btm180","type":"journal-article","created":{"date-parts":[[2007,7,23]],"date-time":"2007-07-23T16:13:46Z","timestamp":1185207226000},"page":"i240-i248","source":"Crossref","is-referenced-by-count":25,"title":["Different mechanistic requirements for prokaryotic and eukaryotic chaperonins: a lattice study"],"prefix":"10.1093","volume":"23","author":[{"given":"Etai","family":"Jacob","sequence":"first","affiliation":[{"name":"1 The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel and 2Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel"}]},{"given":"Amnon","family":"Horovitz","sequence":"additional","affiliation":[{"name":"1 The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel and 2Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel"}]},{"given":"Ron","family":"Unger","sequence":"additional","affiliation":[{"name":"1 The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel and 2Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel"}]}],"member":"286","published-online":{"date-parts":[[2007,7,1]]},"reference":[{"key":"2023062708515916400_B1","doi-asserted-by":"crossref","first-page":"460","DOI":"10.1006\/jmbi.1995.0511","article-title":"Impact of local and non-local interactions on thermodynamics and kinetics of protein folding","volume":"252","author":"Abkevich","year":"1995","journal-title":"J Mol Biol"},{"key":"2023062708515916400_B2","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1126\/science.181.4096.223","article-title":"Principles that govern the folding of protein chains","volume":"181","author":"Anfinsen","year":"1973","journal-title":"Science"},{"key":"2023062708515916400_B3","doi-asserted-by":"crossref","first-page":"701","DOI":"10.1016\/S0022-2836(03)00929-X","article-title":"Effects of confinement in chaperonin assisted protein folding: rate enhancement by decreasing the roughness of the folding energy landscape","volume":"332","author":"Baumketner","year":"2003","journal-title":"J. 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