CAAX prenyl protease N-terminal, five membrane helices
The five N-terminal five transmembrane alpha-helices of peptidase_M48 family proteins including the CAAX prenyl proteases reside completely within the membrane of the endoplasmic reticulum.
Peptidase_M48 is the largely extracellular catalytic region of CAAX prenyl protease homologues such as Human FACE-1 protease. These are metallopeptidases, with the characteristic HExxH motif giving the two histidine-zinc-ligands and an adjacent gluta ...
Peptidase_M48 is the largely extracellular catalytic region of CAAX prenyl protease homologues such as Human FACE-1 protease. These are metallopeptidases, with the characteristic HExxH motif giving the two histidine-zinc-ligands and an adjacent glutamate on the next helix being the third. The whole molecule folds to form a deep groove/cleft into which the substrate can fit [1,2].