Histocompatibility complex class I antigen binding protein p88
Major histocompatibility complex class I antigen-binding protein p88
FunctionCalcium-binding protein that interacts with newly synthesized glycoproteins in the endoplasmic reticulum. It may act in assisting protein assembly and/or in the retention within the ER of unassembled protein subunits. It seems to play a major role in the quality control apparatus of the ER by the retention of incorrectly folded proteins.
Sequence similaritiesBelongs to the calreticulin family.
Cellular localizationEndoplasmic reticulum membrane. Melanosome. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.