Structural insights into the molecular ruler mechanism of the endoplasmic reticulum aminopeptidase ERAP1.
Gandhi, A., Lakshminarasimhan, D., Sun, Y., Guo, H.C.(2011) Sci Rep 1: 186-186
- PubMed: 22355701 
- DOI: https://doi.org/10.1038/srep00186
- Primary Citation of Related Structures:  
3RJO - PubMed Abstract: 
Endoplasmic reticulum aminopeptidase 1 (ERAP1) is an essential component of the immune system, because it trims peptide precursors and generates the N--restricted epitopes. To examine ERAP1's unique properties of length- and sequence-dependent processing of antigen precursors, we report a 2.3 Å resolution complex structure of the ERAP1 regulatory domain. Our study reveals a binding conformation of ERAP1 to the carboxyl terminus of a peptide, and thus provides direct evidence for the molecular ruler mechanism.
Organizational Affiliation: 
Department of Biological Sciences, University of Massachusetts Lowell, 1 University Avenue, Lowell, MA 01854, USA.