JCB logo
amgmicro.com
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

This Article
Right arrow Full Text (PDF, 1577K)
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tan, P. K.
Right arrow Articles by Payne, G. S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tan, P. K.
Right arrow Articles by Payne, G. S.
Right arrowPubmed/NCBI databases
*Protein
*Compound via MeSH
*Substance via MeSH
Hazardous Substances DB
*L-LYSINE
*L-TYROSINE
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

The Journal of Cell Biology, Vol 135, 1789-1800, Copyright © 1996 by The Rockefeller University Press


ARTICLES

The sequence NPFXD defines a new class of endocytosis signal in Saccharomyces cerevisiae

PK Tan, JP Howard and GS Payne
Department of Biological Chemistry, UCLA School of Medicine 90095, USA.

The yeast membrane protein Kex2p uses a tyrosine-containing motif within the cytoplasmic domain for localization to a late Golgi compartment. Because Golgi membrane proteins mislocalized to the plasma membrane in yeast can undergo endocytosis, we examined whether the Golgi localization sequence or other sequences in the Kex2p cytoplasmic domain mediate endocytosis. To assess endocytic function, the Kex2p cytoplasmic domain was fused to an endocytosis-defective form of the alpha-factor receptor. Ste2p. Like intact Ste2p, the chimeric protein, Stex22p, undergoes rapid endocytosis that is dependent on clathrin and End3p. Uptake of Stex22p does not require the Kex2p Golgi localization motif. Instead, the sequence NPFSD, located 37 amino acids from the COOH terminus, is essential for Stex22p endocytosis. Internalization was abolished when the N, P, or F residues were converted to alanine and severely impaired upon conversion of D to A. NPFSD restored uptake when added to the COOH terminus of an endocytosis-defective Ste2p chimera lacking lysine-based endocytosis signals present in wild-type Ste2p. An NPF sequence is present in the cytoplasmic domain of the a- factor receptor, Ste3p. Mutation of this sequence prevented pheromone- stimulated endocytosis of a truncated form of Ste3p. Our results identify NPFSD as a clathrin-dependent endocytosis signal that is distinct from the aromatic amino acid-containing Golgi localization motif and lysine-based, ubiquitin-dependent endocytosis signals in yeast.
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents