title: Isolation of the 3-phosphoglycerate kinase gene of the arbuscular mycorrhizal fungus Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe.
abstract: The 3-phosphoglycerate kinase (PGK) gene of the arbuscular mycorrhizal fungus Glomus mosseae has been isolated by differential RNA display (DD). Experimentally, the technique of DD was utilized to simultaneously compare the mRNA transcript populations from Lycopersicon esculentum root systems colonized by the arbuscular mycorrhizal fungus G. mosseae and non-mycorrhizal plants. A differentially expressed band was isolated and cloned from mycorrhizal tissue. The isolated DD fragment was screened and sequenced. A reverse transcription-PCR (RT-PCR) technique detected transcripts in germinated spores and G. mosseae-colonized root systems but not in uncolonised root systems. The full-length cDNA was isolated by RACE and corresponded to the 3-phosphoglycerate kinase gene of G. mosseae. The cDNA encodes a polypeptide of 416 amino acids, with a predicted molecular weight of 44 764 Da. The PGK proteins shows high homology to those PGKs of other fungi and the phylogenetic relationship among 14 isolated fungal PGK sequences is illustrated.
authors.affiliation: Biotechnology Unit, Plant Science Division, Scottish Agricultural College, Kings Buildings, Mains Road, Edinburgh EH9 3JG, Scotland, UK. L.Harrier@ed.sac.ac.uk
authors.forename: L A
authors.initials: LA
authors.lastname: Harrier
authors.forename: F
authors.initials: F
authors.lastname: Wright
authors.forename: J E
authors.initials: JE
authors.lastname: Hooker
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D005658:Fungi / Q000201:enzymology / Q000235:genetics*; D005800:Genes, Fungal / Q000235:genetics*; D018551:Solanum lycopersicum / Q000382:microbiology; D008969:Molecular Sequence Data; D010735:Phosphoglycerate Kinase / Q000235:genetics*; D010802:Phylogeny; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D013170:Spores / Q000201:enzymology / Q000235:genetics; D014158:Transcription, Genetic
chemical_list: D018076:DNA, Complementary; D010735:Phosphoglycerate Kinase