Download MendeleyThe Crystal Structure of the Novel Calcium-binding Protein AtCBL2 from Arabidopsis thaliana
Nagae, M., Nozawa, A., Koizumi, N., Sano, H., Hashimoto, H., Sato, M., Shimizu, T.(2003) J Biol Chem 278: 42240-42246
- PubMed: 12871972
- DOI: https://doi.org/10.1074/jbc.M303630200
- Primary Citation of Related Structures:
1UHN - PubMed Abstract:
Arabidopsis thaliana calcineurin B-like protein (AtCBL2) is a member of a recently identified family of calcineurin B-like calcium-binding proteins in A. thaliana. The crystal structure of AtCBL2 has been determined at 2.1 A resolution. The protein forms a compact alpha-helical structure with two pairs of EF-hand motifs. The structure is similar in overall folding topology to the structures of calcineurin B and neuronal calcium sensor 1, but differs significantly in local conformation. The two calcium ions are coordinated in the first and fourth EF-hand motifs, whereas the second and third EF-hand motifs are maintained in the open form by internal hydrogen bonding without coordination of calcium ions. Both a possible site and a possible mechanism for the target binding to AtCBL2 are discussed based on the three-dimensional structure.
Organizational Affiliation:
Graduate School of Integrated Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.
