title: Molecular cloning and characterization of an ADP-ribosylation factor 6 gene (ptARF6) from Pisolithus tinctorius.
abstract: ADP-ribosylation factor 6 (ARF6) is an evolutionarily conserved molecule that has an essential function in intracellular trafficking and organelle structure. To better understand its role during presymbiosis between plant roots and compatible filamentous fungi, the full-length cDNA sequence of ARF6 from Pisolithus tinctorius was cloned and a variety of bioinformatics analyses performed. The full-length sequence was 849 bp long and contained a 549 bp open reading frame encoding a protein of 182 amino acids. A phylogenetic analysis showed that ptARF6 was the ortholog of the ADP ribosylation factor 6/GTPase SAR1 gene from the white-rot basidiomycete Trametes versicolor. A domain architecture analysis of the ARF6 protein revealed a repeat region, which is a common feature of ARF6 in other species. Recombinant ARF6 protein was expressed with an N-terminal 6×His tag and purified using Ni(2+)-NTA affinity chromatography. The molecular mass of the recombinant protein was estimated by SDS-PAGE to be 25 kDa. The recombinant ARF6 protein bound strongly to 18:1 and 18:2 phosphatidic acids. Thus, ARF6 may participate in the signaling pathways involved in membrane phospholipid composition. The intracellular distribution of ptADP6 in HEK239T cells also indicates that ptADP6 may function not only in plasma membrane events but also in endosomal membranes events. Real-time quantitative PCR revealed that the differential expression of ptARF6 was associated with the presymbiotic stage. ptARF6 may be induced by presymbiosis during the regulation of mycorrhizal formation.
authors.affiliation: a Zhejiang Forestry Academy, Zhejiang Provincial Key Laboratory of Forest Food, Hangzhou, 310023, People's Republic of China.
authors.forename: Liling
authors.initials: L
authors.lastname: Wang
authors.affiliation: a Zhejiang Forestry Academy, Zhejiang Provincial Key Laboratory of Forest Food, Hangzhou, 310023, People's Republic of China.
authors.forename: Haibo
authors.initials: H
authors.lastname: Li
authors.affiliation: b Zhejiang University of Science and Technology, Hangzhou, 310023, People's Republic of China.
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: a Zhejiang Forestry Academy, Zhejiang Provincial Key Laboratory of Forest Food, Hangzhou, 310023, People's Republic of China.
authors.forename: Yuchuan
authors.initials: Y
authors.lastname: Qin
authors.affiliation: a Zhejiang Forestry Academy, Zhejiang Provincial Key Laboratory of Forest Food, Hangzhou, 310023, People's Republic of China.
authors.forename: Yanbin
authors.initials: Y
authors.lastname: Wang
authors.affiliation: a Zhejiang Forestry Academy, Zhejiang Provincial Key Laboratory of Forest Food, Hangzhou, 310023, People's Republic of China.
authors.forename: Bentong
authors.initials: B
authors.lastname: Liu
authors.affiliation: a Zhejiang Forestry Academy, Zhejiang Provincial Key Laboratory of Forest Food, Hangzhou, 310023, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Qian
mesh_terms: D000089982:ADP-Ribosylation Factor 6; D020727:ADP-Ribosylation Factors / Q000235:genetics*; D001487:Basidiomycota / Q000235:genetics*; D002462:Cell Membrane / Q000378:metabolism; D003001:Cloning, Molecular; D004591:Electrophoresis, Polyacrylamide Gel; D011992:Endosomes; D005800:Genes, Fungal; D010802:Phylogeny; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism
chemical_list: D000089982:ADP-Ribosylation Factor 6; D011994:Recombinant Proteins; D020727:ADP-Ribosylation Factors
keywords: ADP-ribosylation factor 6; Pisolithus tinctorius; facteur d’ADP-ribosylation 6; mycorhizes; mycorrhiza