期刊
PLANT AND CELL PHYSIOLOGY
卷 46, 期 2, 页码 381-386出版社
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pci036
关键词
constitutively active form; heterotrimeric G protein; rice; site-directed mutagenesis; transgenic plant
We used site-directed mutagenesis to engineer two constitutively active forms of the alpha subunit of a rice heterotrimeric G protein. The recombinant proteins produced from these novel cDNAs had GTP-binding activity but no GTPase activity. A chimeric gene for a constitutively active form of the alpha. subunit was introduced into the rice mutant d1, which is defective for the a-subunit gene. All the transformants essentially showed a wild-type phenotype compared with normal cultivars, although seed sizes were substantially increased and internode lengths also showed some increase.
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