A model of protein association based on their hydrophobic and electric interactions
MetadataShow full item record
The propensity of many proteins to oligomerize and associate to form complex structures from their constituent monomers, is analyzed in terms of their hydrophobic (H), and electric pseudo-dipole (D) moment vectors. In both cases these vectors are defined as the product of the distance between their
positive and negative centroids, times the total hydrophobicity or total positive charge of the protein. Changes in the magnitudes and directions of H and D are studied as monomers associate to form larger complexes. We use these descriptors to study similarities and differences in two groups of associations: a) open associations such as polymers with an undefined number of monomers (i.e. actin polymerization, amyloid and HIV capsid assemblies); b) closed symmetrical associations of finite size, like spherical virus capsids and protein cages. The tendency of the hydrophobic moments of the monomers in an association is to align in parallel arrangements following a pattern similar to those of phospholipids in a membrane. Conversely, electric dipole moments of monomers tend to align in antiparallel associations. The final conformation of a given assembly is a fine-tuned combination of these forces, limited by steric constraints. This determines whether the association will be open (indetermined number of monomers) or closed (fixed number of monomers). Any kinetic, binding or molecular peculiarities that characterize a protein assembly, comply with the vector rules laid down in this paper. These findings are also independent of protein size and shape.
Is part ofPLoS One, 2014, vol. 9, núm. 10, e110352
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Mozo Villarías, Angel; Cedano, Juan; Querol, Enrique (Springer, 2016)This article describes the formation of homodimers from their constituting monomers, based on the rules set by a simple model of electric and hydrophobic interactions. These interactions are described in terms of the ...
Hernández, Sergio; Ferragut, Gabriela; Amela, Isaac; Perez-Pons, Josep Antoni; Piñol, Jaume; Mozo Villarías, Angel; Cedano, Juan; Querol, Enrique (Oxford University Press, 2014)We have compiled MultitaskProtDB, available online at http://wallace.uab.es/multitask, to provide a repository where the many multitasking proteins found in the literature can be stored. Multitasking or moonlighting ...
Franco-Serrano, Luis; Huerta, Mario; Hernández, Sergio; Cedano, Juan; Perez-Pons, Josep Antoni; Piñol, Jaume; Mozo Villarías, Angel; Amela, Isaac; Querol, Enrique (Springer Verlag, 2018)Multifunctionality or multitasking is the capability of some proteins to execute two or more biochemical functions. The objective of this work is to explore the relationship between multifunctional proteins, human diseases ...