title: Functional analyses of two syntaxin-like SNARE genes, GzSYN1 and GzSYN2, in the ascomycete Gibberella zeae.
abstract: We identified two syntaxin-like SNARE genes, named GzSYN1 and GzSYN2, from the plant pathogenic ascomycete Gibberella zeae, and characterized the functions and cellular localization of these genes. The GzSYN1 deletion mutant (Deltagzsyn1) had 71% reduced hyphal growth compared to the wild-type strain, but produced perithecia with normal ascospores. Deltagzsyn2 had the same hyphal growth rate as the wild-type, but completely lost both self and female fertility. When Deltagzsyn2 was spermatized for Deltamat1-1 or Deltamat1-2 strains, it retained its male fertility, but the ascus shape was abnormal and ascospore delimitation was delayed. The Deltagzsyn1 and Deltagzsyn2 virulence on barley was reduced by 67% and 75%, respectively, compared to the wild-type. The GFP::GzSYN1 fusion protein was localized in vesicles, vacuoles, plasma membranes, and septa, whereas GFP::GzSYN2 was found only in plasma membranes and septa. These results suggest that syntaxins have key roles in fungal development and virulence in G. zeae.
authors.affiliation: Department of Agricultural Biotechnology and Center for Fungal Pathogenesis, Seoul National University, Seoul 151-921, Republic of Korea.
authors.forename: Sae-Yeon
authors.initials: SY
authors.lastname: Hong
authors.forename: Jinny
authors.initials: J
authors.lastname: So
authors.forename: Jungkwan
authors.initials: J
authors.lastname: Lee
authors.forename: Kyunghun
authors.initials: K
authors.lastname: Min
authors.forename: Hokyoung
authors.initials: H
authors.lastname: Son
authors.forename: Chanju
authors.initials: C
authors.lastname: Park
authors.forename: Sung-Hwan
authors.initials: SH
authors.lastname: Yun
authors.forename: Yin-Won
authors.initials: YW
authors.lastname: Lee
mesh_terms: D002462:Cell Membrane / Q000737:chemistry; D022162:Cytoplasmic Vesicles / Q000737:chemistry; D005656:Fungal Proteins / Q000235:genetics* / Q000378:metabolism*; D017353:Gene Deletion; D017930:Genes, Reporter; D005874:Gibberella / Q000201:enzymology* / Q000235:genetics; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D001467:Hordeum / Q000382:microbiology; D025301:Hyphae / Q000254:growth & development; D010935:Plant Diseases / Q000382:microbiology*; D050765:Qa-SNARE Proteins / Q000235:genetics* / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D013172:Spores, Fungal / Q000254:growth & development; D014617:Vacuoles / Q000737:chemistry; D014774:Virulence
chemical_list: D005656:Fungal Proteins; D050765:Qa-SNARE Proteins; D011993:Recombinant Fusion Proteins; D049452:Green Fluorescent Proteins