Rab GTPases pp 245-258 | Cite as

Methods for Analysis of AP-3/Rabin4’ in Regulation of Lysosome Distribution

  • Viorica Ivan
  • Peter van der SluijsEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 1298)


The position of lysosomes in the cytoplasm is important for their ability to fuse with the plasma membrane and release of proteases that are involved in tissue remodeling. Motor-directed bidirectional transport along microtubules is a critical process determining the distribution of lysosomes. How lysosomes are tethered to microtubules is incompletely understood, but a role for small GTPases of rab and arl families has been documented. We recently found that the rab5 and rab4 effector rabip4′ interacts with the adaptor complex AP-3 in a rab4-dependent manner on tubular endosomes. We here describe the assays that led to the identification of AP-3 as a rabip4′ partner and the role of the complex in regulating the spatial distribution of lysosomes.

Key words

rabip4/rabip4′ AP-3 complex Lysosomes Microtubules 



This research was supported by grant UEFISCDI PNII-RU 122/2010 (VI) and the Netherlands Organization for Scientific Research NWO-CW (PvdS).


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Molecular Cell BiologyInstitute of Biochemistry of the Romanian AcademyBucharestRomania
  2. 2.Department of Cell BiologyUniversity Medical Center UtrechtUtrechtThe Netherlands

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