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Tubulin Tyrosine Ligase and Stathmin Compete for Tubulin Binding In Vitro.

Authors :
Szyk, Agnieszka
Piszczek, Grzegorz
Roll-Mecak, Antonina
Source :
Journal of Molecular Biology. Jul2013, Vol. 425 Issue 14, p2412-2414. 3p.
Publication Year :
2013

Abstract

Abstract: Tubulin partition between soluble and polymeric forms is tightly regulated in cells. Stathmin and tubulin tyrosine ligase (TTL) each form stable complexes with tubulin and inhibit tubulin polymerization. Here we explore the mutual relationship between these proteins in vitro and demonstrate that full-length stathmin and TTL compete for binding to tubulin and fail to make a stable tubulin:stathmin:TTL triple complex in solution. Moreover, stathmin depresses TTL tubulin tyrosination activity in vitro. These results suggest either that TTL and stathmin have a partially overlapping footprint on the tubulin dimer or that stathmin induces a tubulin conformation incompatible with stable TTL binding. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
00222836
Volume :
425
Issue :
14
Database :
Academic Search Index
Journal :
Journal of Molecular Biology
Publication Type :
Academic Journal
Accession number :
88988501
Full Text :
https://doi.org/10.1016/j.jmb.2013.04.017