GTP-binding protein YPT1 - P01123 (YPT1_YEAST)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P01123: 4
 
Function
The small GTPases Rab are key regulators of intracellular membrane trafficking, from the formation of transport vesicles to their fusion with membranes. Rabs cycle between an inactive GDP-bound form and an active GTP-bound form that is able to recruit to membranes different set of downstream effectors directly responsible for vesicle formation, movement, tethering and fusion. YPT1 regulates the trafficking of secretory vesicles from the endoplasmic reticulum (ER) to the Golgi. Vesicular transport depends on shuttling of YPT1 between membrane and cytosol by GDI1, probably by recycling it to its membrane of origin after a vesicle fusion event. Plays a role in the initial events of the autophagic vacuole development which take place at specialized regions of the endoplasmic reticulum. Also involved in the recycling of membrane proteins. UniProt
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Subunit Structure
Forms a complex with the Rab escort protein (REP) MRS6, which is recognized by Rab geranylgeranyltransferase BET2-BET4. Interacts with the Rab GDP dissociation inhibitor GDI1, which can retrieve from and deliver to membranes the GDP-bound and prenylated form of YPT1. Interacts with YIP1, which is required for proper membrane targeting of prenylated YPT1. Interacts with YIF1, YIP3, YIP4 and YIP5. UniProt
  • Organism: Baker's yeast
  • Length:
  • UniProt
  • Other Gene names: YPT1, YP2, YFL038C
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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