Life and death of a BiP substrate

Semin Cell Dev Biol. 2010 Jul;21(5):472-8. doi: 10.1016/j.semcdb.2009.12.008. Epub 2009 Dec 21.


BiP is the mammalian endoplasmic reticulum (ER) Hsp70 orthologue that plays a major role in all functions of this organelle including the seemingly opposing functions of aiding the maturation of unfolded nascent proteins and identifying and targeting chronically unfolded proteins for degradation. The recent identification of mammalian BiP co-factors combined with delineation of the ER degradation machinery and data suggesting that the ER is subdivided into unique regions helps explain how these different functions can occur in the same organelle and raises some unresolved issues.

Publication types

  • Review

MeSH terms

  • Animals
  • Endoplasmic Reticulum / metabolism*
  • HSP70 Heat-Shock Proteins / metabolism*
  • Humans


  • HSP70 Heat-Shock Proteins