Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 334, Issue 1, Pages 128-133Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2005.06.067
Keywords
RILP; Rab7; Rab34; membrane traffic; lysosome; late endosome; endocytosis; oligomerization; two-hybrid
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Rab-interacting lysosomal protein (RILP) has been identified as an interacting partner of the small GTPases Rab7 and Rab34. Active Rab7 recruits RILP on the late endosomal/lysosomal membrane and RILP then functions as a Rab7 effector controlling transport to degradative compartments. Indeed, RILP induces recruitment of dynein-dynactin motor complexes to Rab7-containing late endosomes and lysosomes. Recently, Rab7 and RILP have been found to be key proteins also for the biogenesis of phagolysosomes. Therefore, RILP represents probably an important factor for all endocytic routes to lysosomes. In this study, we show, using the yeast two-hybrid system.. that RILP is able to interact with itself. The data obtained with the two-hybrid system were confirmed using co-immunoprecipitation in HeLa cells. The data together indicate that RILP, as already demonstrated for several other Rab effector proteins, is capable of self-association, thus probably forming a homo-dimer. (c) 2005 Elsevier Inc. All rights reserved.
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