Abundance of intrinsic disorder in SV-IV, a multifunctional androgen-dependent protein secreted from rat seminal vesicle

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Abstract

The potent immunomodulatory, anti-inflammatory and procoagulant properties of protein no. 4 secreted from the rat seminal vesicle epithelium (SV-IV) have previously been found to be modulated by a supramolecular monomer-trimer equilibrium. More structural details that integrate experimental data into a predictive framework have recently been reported. Unfortunately, homology modelling and fold-recognition strategies were not successful in creating a theoretical model of the structural organization of SV-IV. It was inferred that the global structure of SV-IV is not similar to that of any protein of known three-dimensional structure. Reversing the classical approach to the sequence-structure-function paradigm, in this paper we report novel information obtained by comparing the physicochemical parameters of SV-IV with two datasets composed of intrinsically unfolded and ideally globular proteins. In addition, we analyse the SV-IV sequence by several publicly available disorder-oriented predictors. Overall, disorder predictions and a re-examination of existing experimental data strongly suggest that SV-IV needs large plasticity to efficiently interact with the different targets that characterize its multifaceted biological function, and should therefore be better classified as an intrinsically disordered protein. © 2008 The Authors.

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Vilasi, S., & Ragone, R. (2008). Abundance of intrinsic disorder in SV-IV, a multifunctional androgen-dependent protein secreted from rat seminal vesicle. FEBS Journal, 275(4), 763–774. https://doi.org/10.1111/j.1742-4658.2007.06242.x

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