title: Molecular cloning and partial characterization of a plant VAP33 homologue with a major sperm protein domain.
abstract: In a search for proteins interacting with the resistance protein Cf9 from tomato, a new cDNA was cloned and characterized. Protein sequence database searches suggested that the 120 residue-N terminal domain of the encoded protein (named VAP27) is highly similar to the VAP33 protein family from animals, to uncharacterized plant proteins, and to a lower extent, to the major sperm protein (MSP) from nematodes. The second half of the protein is similar to VAMP and to the VAP33 N-terminus comprising a predicted coiled-coil region followed by a transmembrane segment. The sequence/structure comparison of VAP27 with the crystal structure of AsMSP1 from Ascaris suum, using molecular modeling with the threading method, suggested that the N-terminus of VAP27 does possess a MSP-like domain that might participate in the formation of a protein-protein network. The coiled-coil region of VAP27 was modeled based on the structure of the VAP- and VAMP-containing SNARE complex. The coiled-coil region might also be involved in protein-protein interactions similar to VAP-VAMP interactions.
authors.affiliation: Laboratory of Phytopathology, Wageningen University, Binnenhaven 9, Wageningen, 6709 PD, The Netherlands.
authors.forename: F
authors.initials: F
authors.lastname: Laurent
authors.forename: G
authors.initials: G
authors.lastname: Labesse
authors.forename: P
authors.initials: P
authors.lastname: de Wit
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002352:Carrier Proteins / Q000235:genetics; D003001:Cloning, Molecular; D015801:Helminth Proteins / Q000235:genetics; D008562:Membrane Glycoproteins / Q000378:metabolism; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D008958:Models, Molecular; D010935:Plant Diseases; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D011485:Protein Binding; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D017386:Sequence Homology, Amino Acid; D020798:Two-Hybrid System Techniques
chemical_list: D002352:Carrier Proteins; D015801:Helminth Proteins; D008562:Membrane Glycoproteins; D008565:Membrane Proteins; D010940:Plant Proteins; C407153:VAP27 protein, Nicotiana plumbaginifolia; C050602:major sperm protein, nematode