Crystallization and preliminary X-ray crystallographic analysis of the CARD domain of apoptosis repressor with CARD (ARC)

Apoptosis repressor with caspase-recruiting domain (ARC) is an apoptosis repressor that inhibits both intrinsic and extrinsic apoptosis signalling. Human ARC contains an N-terminal caspase-recruiting domain (CARD domain) and a C-terminal proline- and glutamic acid-rich (P/E-rich) domain. The CARD domain in ARC is the domain that is directly involved in inhibition of the extrinsic pathway. In this study, the N-terminal CARD domain of ARC was overexpressed, purified and crystallized. X-ray diffraction data were collected to a resolution of 2.1 angstrom and the crystals were found to belong to space group P6(1) or P6(5), with unit-cell parameters a = 98.28, b = 98.28, c = 51.86 angstrom, alpha= 90, beta = 90, gamma = 120 degrees.