Deciphering the folding transition state structure and denatured state properties of nucleophosmin C-terminal domain. (Articolo in rivista)

Type
Label
  • Deciphering the folding transition state structure and denatured state properties of nucleophosmin C-terminal domain. (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Scaloni F, Federici L, Brunori M, Gianni S. (2010)
    Deciphering the folding transition state structure and denatured state properties of nucleophosmin C-terminal domain.
    in Proceedings of the National Academy of Sciences of the United States of America
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Scaloni F, Federici L, Brunori M, Gianni S. (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto Pasteur-Fondazione Cenci Bolognetti and Istituto di Biologia e Patologia Molecolari del Consiglio Nazionale delle Ricerche, Dipartimento di Scienze Biochimiche A. Rossi Fanelli, Università di Roma La Sapienza, Rome, Italy; Centro Studi sull'Invecchiamento and Dipartimento di Scienze Biomediche, Università di Chieti G. D'Annunzio, Chieti, Italy (literal)
Titolo
  • Deciphering the folding transition state structure and denatured state properties of nucleophosmin C-terminal domain. (literal)
Abstract
  • Nucleophosmin (NPM1), one of the most abundant nucleolar proteins, is a frequent target of oncogenic mutations in acute myeloid leukaemia (AML). Mutation-induced changes at the C-terminal domain of NPM1 (Cter-NPM1) compromise its stability and cause the aberrant translocation of NPM1 to the cytosol. Hence, this protein represents a suitable candidate to investigate the relations between folding and disease. Since Cter-NPM1 folds via a compact denatured state, stabilization of the folded state of the mutated variants demands detailed structural information on both the native and denatured states. Here, we present the characterization of the complete folding pathway of Cter-NPM1 and provide molecular details for both the transition and the denatured states. The structure of the transition state was assessed by F-value analysis, whereas residual structure in the denatured state was mapped by evaluating the effect of mutations as modulated by conditions promoting denatured state compaction. Data reveal that folding of Cter-NPM1 proceeds via an extended nucleus and that the denatured state retains significant malleable structure at the interface between the second and third helices. Our observations constitute the essential prerequisite for structure-based drug-design studies, aimed at identifying molecules that may rescue pathological NPM1 mutants by stabilizing the native-like state. (literal)
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