title: Analysis of the region in between two closely linked patatin genes: class II promoter activity in tuber, root and leaf.
abstract: From a potato genomic library a phage lambda clone was isolated that carried nucleotide sequences of two patatin genes, thus demonstrating a close physical linkage between these two members of the patatin gene family. Sequence and restriction analysis showed the genes to be oriented in tandem. The more upstream gene was a pseudogene truncated at the 3' end, whereas the downstream gene was a class II patatin gene. In addition to a 208 bp fragment also present in patatin class I promoters, the region in between both genes contained various direct repeats also found in other patatin genes. To study the promoter activity of this intergenic region, a 2.78 kb fragment was transcriptionally fused to the beta-glucuronidase gene and reintroduced into potato cultivar Bintje. Histochemical analysis revealed expression in the outermost layer of cells of the cortex, in the tuber phellogen, in or around the root vascular system, and also in the abaxial phloem layer of the vascular bundle in leaves.
authors.affiliation: DLO-Centre for Plant Breeding and Reproduction Research (CPRO-DLO), Department of Molecular Biology, Wageningen, Netherlands.
authors.forename: J P
authors.initials: JP
authors.lastname: Nap
authors.forename: W G
authors.initials: WG
authors.lastname: Dirkse
authors.forename: J
authors.initials: J
authors.lastname: Louwerse
authors.forename: J
authors.initials: J
authors.lastname: Onstenk
authors.forename: R
authors.initials: R
authors.lastname: Visser
authors.forename: A
authors.initials: A
authors.lastname: Loonen
authors.forename: F
authors.initials: F
authors.lastname: Heidekamp
authors.forename: W J
authors.initials: WJ
authors.lastname: Stiekema
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002265:Carboxylic Ester Hydrolases; D003001:Cloning, Molecular; D004247:DNA; D008040:Genetic Linkage; D005966:Glucuronidase / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D005810:Multigene Family; D009928:Organ Specificity / Q000235:genetics; D010940:Plant Proteins / Q000235:genetics*; D011401:Promoter Regions, Genetic; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid; D011198:Solanum tuberosum / Q000235:genetics* / Q000378:metabolism
chemical_list: D010940:Plant Proteins; C043222:patatin protein, Solanum tuberosum; D004247:DNA; D002265:Carboxylic Ester Hydrolases; D005966:Glucuronidase