Grab a Golgi: laser trapping of Golgi bodies reveals in vivo interactions with the endoplasmic reticulum.
Traffic. 2009 May; 10(5):567-71
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I found this paper very interesting as its results strongly imply that Golgi stacks are attached to the tubules of ER (endoplasmic reticulum) in plant cells. These findings help explain earlier findings that the domains of the ER that are involved in protein export are associated with motile Golgi stacks.
How can motile Golgi stacks receive cargo from the ER while they are moving? A characteristic of plant Golgi stacks is that they are motile. It has been shown that fluorescent protein fusions to COPII (coat protein complex II) proteins label structures that moved with the Golgi and that the Golgi could receive cargo from the ER during stationary and non-stationary phases. These findings raise the question, how is delivery of COPII carriers achieved if the Golgi moves over the ER surface? Using laser optical tweezers, Sparkes et al. have shown that Golgi stacks are associated with the ER and that the ER tubules can be remodeled to follow a Golgi trapped and dragged in a cell with the tweezers. These findings strongly imply that Golgi stacks may move with the ER rather than over it and are consistent with a model in which COPII carriers are generated at an ER/Golgi interface that is relatively static.
Brandizzi F: F1000Prime Recommendation of [Sparkes IA et al., Traffic 2009, 10(5):567-71]. In F1000Prime, 17 Dec 2009; DOI: 10.3410/f.1282050.749147. F1000Prime.com/1282050#eval749147
F1000Prime Recommendations, Dissents and Comments for [Sparkes IA et al., Traffic 2009, 10(5):567-71]. In F1000Prime, 17 Apr 2014; F1000Prime.com/1282050
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