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- W2009031118 abstract "Abstract The doublecortin‐like (DC) domains, which usually occur in tandem, constitute novel microtubule‐binding modules. They were first identified in doublecortin (DCX), a protein expressed in migrating neurons, and in the doublecortin‐like kinase (DCLK). They are also found in other proteins, including the RP1 gene product which—when mutated—causes a form of inherited blindness. We previously reported an X‐ray structure of the N‐terminal DC domain of DCLK (N‐DCLK), and a solution structure of an analogous module of human doublecortin (N‐DCX). These studies showed that the DC domain has a tertiary fold closely reminiscent of ubiquitin and similar to several GTPase‐binding domains. We now report an X‐ray structure of a mutant of N‐DCX, in which the C‐terminal fragment (residues 139–147) unexpectedly shows an altered, “open” conformation. However, heteronuclear NMR data show that this C‐terminal fragment is only transiently open in solution, and assumes a predominantly “closed” conformation. While the “open” conformation may be artificially stabilized by crystal packing interactions, the observed switching between the “open” and “closed” conformations, which shortens the linker between the two DC‐domains by ∼20 Å, is likely to be of functional importance in the control of tubulin polymerization and microtubule bundling by doublecortin. Proteins 2006. © 2006 Wiley‐Liss, Inc." @default.
- W2009031118 created "2016-06-24" @default.
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- W2009031118 date "2006-07-11" @default.
- W2009031118 modified "2023-10-17" @default.
- W2009031118 title "The DC-module of doublecortin: Dynamics, domain boundaries, and functional implications" @default.
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- W2009031118 doi "https://doi.org/10.1002/prot.21068" @default.
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