Selection of Arabidopsis genes encoding secreted and plasma membrane proteins

Selection of Arabidopsis genes encoding secreted and plasma membrane proteins Secreted and plasma membrane proteins play crucial roles in a variety of physiological and developmental processes of multicellular organisms. Systematic cloning of the genes encoding these proteins is therefore of general interest. An effective method of trapping signal sequences was first described by Tashiro et al. (1993), and a similar yet more efficient method was reported by Klein et al. (1996) and Jacobs et al. (1997). In this study, we carried out the latter yeast-based signal sequence trap to clone genes from Arabidopsis thaliana encoding secreted and plasma membrane proteins. Of 144 sequenced cDNA clones, 18% are identical to previously cloned Arabidopsis thaliana genes, 12% are homologous to genes identified from various organisms, and 46% are novel. All of the isolated genes identical or homologous to previously reported genes are either secreted or plasma membrane proteins, and the remaining novel genes appear to contain functional signal sequences based on computer-aided sequence analysis. The full-length cDNA clones of one homologous gene and another novel gene were isolated and sequenced. The deduced amino acid sequences suggest that the former encodes a secreted protein, and the latter encodes a type 1 membrane protein. These results indicate that the signal sequence trap method is effective and useful for the isolation of plant genes encoding secreted and plasma membrane proteins. Plant Molecular Biology Springer Journals

Selection of Arabidopsis genes encoding secreted and plasma membrane proteins

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Kluwer Academic Publishers
Copyright © 1999 by Kluwer Academic Publishers
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
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