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In several works it has been shown that the interplay between short range and long range interactions, mimicking the hydrophobic effect, leads to the formation of the typical secondary structures in proteins, alpha-helices and beta-sheets. In this work we study in detail how the general properties of the energy landscape emerge in a model that presents both components. In this regard it proves useful...
The evolution of RNA viruses under antiviral pressure is characterized by high mutation rates and strong selective forces that induce extremely rapid changes of protein sequences. This makes the course of molecular evolution directly observable on time scales of months. Here we study the interplay between selection for drug resistance and selection for thermodynamic stability in the protease (PR)...
We review and further develop an analytical model that describes how thermodynamic constraints on the stability of the native state influence protein evolution in a site-specific manner. To this end, we represent both protein sequences and protein structures as vectors: structures are represented by the principal eigenvector (PE) of the protein contact matrix, a quantity that resembles closely the...
Green fluorescent protein (GFP) has been used to report protein folding by correlating solubility with fluorescence. In a GFP fusion protein, an upstream aggregation-prone domain can disrupt de novo folding of the GFP domain in Escherichia coli, resulting in a loss of fluorescence. Previously, we showed that prevention of misfolding of the upstream aggregation-prone domain by a coupled folding and...
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