Live imaging of yeast Golgi cisternal maturation

Nature. 2006 Jun 22;441(7096):1007-10. doi: 10.1038/nature04737. Epub 2006 May 14.


There is a debate over how protein trafficking is performed through the Golgi apparatus. In the secretory pathway, secretory proteins that are synthesized in the endoplasmic reticulum enter the early compartment of the Golgi apparatus called cis cisternae, undergo various modifications and processing, and then leave for the plasma membrane from the late (trans) cisternae. The cargo proteins must traverse the Golgi apparatus in the cis-to-trans direction. Two typical models propose either vesicular transport or cisternal progression and maturation for this process. The vesicular transport model predicts that Golgi cisternae are distinct stable compartments connected by vesicular traffic, whereas the cisternal maturation model predicts that cisternae are transient structures that form de novo, mature from cis to trans, and then dissipate. Technical progress in live-cell imaging has long been awaited to address this problem. Here we show, by the use of high-speed three-dimensional confocal microscopy, that yeast Golgi cisternae do change the distribution of resident membrane proteins from the cis nature to the trans over time, as proposed by the maturation model, in a very dynamic way.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • COP-Coated Vesicles / metabolism
  • Coatomer Protein / genetics
  • Coatomer Protein / metabolism
  • Fungal Proteins / metabolism
  • Golgi Apparatus / metabolism
  • Golgi Apparatus / physiology*
  • Intracellular Membranes / metabolism
  • Membrane Proteins / metabolism
  • Microscopy, Confocal
  • Microscopy, Fluorescence
  • Models, Biological
  • Mutation
  • Qb-SNARE Proteins / metabolism
  • SNARE Proteins
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism
  • Saccharomyces cerevisiae / physiology*
  • Saccharomyces cerevisiae Proteins / genetics
  • Saccharomyces cerevisiae Proteins / metabolism*
  • Vesicular Transport Proteins


  • Coatomer Protein
  • Fungal Proteins
  • GOS1 protein, S cerevisiae
  • Membrane Proteins
  • Qb-SNARE Proteins
  • RER1 protein, S cerevisiae
  • SNARE Proteins
  • Saccharomyces cerevisiae Proteins
  • Vesicular Transport Proteins