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Arf-Like Proteins

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Part of the book series: Proteins and Cell Regulation ((PROR,volume 1))

Abstract

At least 10 different proteins have homology to members of the Arf family but each lacks activities that define “true” Arfs. In addition, the percent identity between these 10 proteins, when aligned with Arfs or to each other, is lower (typically 40–60%) than that between Arfs (greater than 65% identity). A summary of current information on each is presented below. Despite extensive conservation of structure between Arfs and Arls, the Arls represent a much more functionally divergent collection of GTPases, with apparent roles in vesicle traffic (Arl1, Sarl), microtubule organization (Arl2, Arl3), spermatogenesis (Arl4), and differentiation (Arfrp1). However, the overlap in binding partners between functionally distinct Arls suggests that Arfs and Arls are likely to have a complex web of overlapping and distinct functions.

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Schürmann, A., Joost, HG. (2004). Arf-Like Proteins. In: ARF Family GTPases. Proteins and Cell Regulation, vol 1. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2593-9_16

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