Fasciola hepatica calcium-binding protein FhCaBP2: structure of the dynein light chain-like domain.Nguyen, T.H., Thomas, C.M., Timson, D.J., van Raaij, M.J.
(2016) Parasitol. Res. 115: 2879-2886
- PubMed: 27083189
- DOI: 10.1007/s00436-016-5046-x
- Primary Citation of Related Structures:
- PubMed Abstract:
- Fhcabp2: A Fasciola Hepatica Calcium-Binding Protein with EF-Hand and Dynein Light Chain Domains.
Thomas, C.M.,Timson, D.J.
(2015) Parasitology 142: 1375
The common liver fluke Fasciola hepatica causes an increasing burden on human and animal health, partly because of the spread of drug-resistant isolates. As a consequence, there is considerable interest in developing new drugs to combat liver fluke i ...
The common liver fluke Fasciola hepatica causes an increasing burden on human and animal health, partly because of the spread of drug-resistant isolates. As a consequence, there is considerable interest in developing new drugs to combat liver fluke infections. A group of potential targets is a family of calcium-binding proteins which combine an N-terminal domain with two EF-hand motifs and a C-terminal domain with predicted similarity to dynein light chains (DLC-like domain). The function of these proteins is unknown, although in several species, they have been localised to the tegument, an important structure at the host-parasite interface. Here, we report the X-ray crystal structure of the DLC-like domain of F. hepatica calcium-binding protein 2 (FhCaBP2), solved using single-wavelength anomalous diffraction and refined at 2.3 Å resolution in two different crystal forms. The FhCaBP2 DLC-like domain has a structure similar to other DLC domains, with an anti-parallel β-sheet packed against an α-helical hairpin. Like other DLC domains, it dimerises through its β2-strand, which extends in an arch and forms the fifth strand in an extended β-sheet of the other monomer. The structure provides molecular details of the dimerisation of FhCaBP2, the first example from this family of parasite proteins.
Dpto de Estructura de Macromoleculas, Centro Nacional de Biotecnologia-CSIC, calle Darwin 3, E-28049, Madrid, Spain.