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Molecules 2016, 21(8), 1090; doi:10.3390/molecules21081090

Order, Disorder, and Everything in Between

1
Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
2
USF Health Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
3
Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, St. Petersburg 194064, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 21 July 2016 / Revised: 10 August 2016 / Accepted: 11 August 2016 / Published: 19 August 2016
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Abstract

In addition to the “traditional” proteins characterized by the unique crystal-like structures needed for unique functions, it is increasingly recognized that many proteins or protein regions (collectively known as intrinsically disordered proteins (IDPs) and intrinsically disordered protein regions (IDPRs)), being biologically active, do not have a specific 3D-structure in their unbound states under physiological conditions. There are also subtler categories of disorder, such as conditional (or dormant) disorder and partial disorder. Both the ability of a protein/region to fold into a well-ordered functional unit or to stay intrinsically disordered but functional are encoded in the amino acid sequence. Structurally, IDPs/IDPRs are characterized by high spatiotemporal heterogeneity and exist as dynamic structural ensembles. It is important to remember, however, that although structure and disorder are often treated as binary states, they actually sit on a structural continuum. View Full-Text
Keywords: unfolded; flexible; unstructured; intrinsically disordered; protein function; structural heterogeneity; multi-functionality unfolded; flexible; unstructured; intrinsically disordered; protein function; structural heterogeneity; multi-functionality
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DeForte, S.; Uversky, V.N. Order, Disorder, and Everything in Between. Molecules 2016, 21, 1090.

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