Download MendeleyCrystal structure of a FYVE-type zinc finger domain from the caspase regulator CARP2.
Tibbetts, M.D., Shiozaki, E.N., Gu, L., McDonald, E.R., El-Deiry, W.S., Shi, Y.(2004) Structure 12: 2257-2263
- PubMed: 15576038
- DOI: https://doi.org/10.1016/j.str.2004.10.007
- Primary Citation of Related Structures:
1Y02 - PubMed Abstract:
The caspase-associated ring proteins (CARP1 and CARP2) are distinguished from other caspase regulators by the presence of a FYVE-type zinc finger domain. FYVE-type domains are divided into two known classes: FYVE domains that specifically bind to phosphatidylinositol 3-phosphate in lipid bilayers and FYVE-related domains of undetermined function. Here, we report the crystal structure of the N-terminal region of CARP2 (44-139) including the FYVE-type domain and its associated helical bundle at 1.7 A resolution. The structure reveals a cramped phosphoinositide binding pocket and a blunted membrane insertion loop. These structural features indicate that the domain is not optimized to bind to phosphoinositides or insert into lipid bilayers. The CARP2 FYVE-like domain thus defines a third subfamily of FYVE-type domains that are functionally and structurally distinct. Structural analyses provide insights into the possible function of this unique subfamily of FYVE-type domains.
Organizational Affiliation:
Department of Molecular Biology, Lewis Thomas Laboratory, Princeton University, Princeton, NJ 08544, USA.
