Format

Send to

Choose Destination
See comment in PubMed Commons below
J Cell Biol. 2007 Nov 19;179(4):635-41. Epub 2007 Nov 12.

Switching of membrane organelles between cytoskeletal transport systems is determined by regulation of the microtubule-based transport.

Author information

  • 1Center for Cell Analysis and Modeling, University of Connecticut Health Center, Farmington, CT 06032, USA.

Abstract

Intracellular transport of membrane organelles occurs along microtubules (MTs) and actin filaments (AFs). Although transport along each type of the cytoskeletal tracks is well characterized, the switching between the two types of transport is poorly understood because it cannot be observed directly in living cells. To gain insight into the regulation of the switching of membrane organelles between the two major transport systems, we developed a novel approach that combines live cell imaging with computational modeling. Using this approach, we measured the parameters that determine how fast membrane organelles switch back and forth between MTs and AFs (the switching rate constants) and compared these parameters during different signaling states. We show that regulation involves a major change in a single parameter: the transferring rate from AFs onto MTs. This result suggests that MT transport is the defining factor whose regulation determines the choice of the cytoskeletal tracks during the transport of membrane organelles.

PMID:
17998399
PMCID:
PMC2080897
DOI:
10.1083/jcb.200705146
[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Support Center