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GrainGenes Reference Report: PCP-42-789

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Reference	PCP-42-789
Title	Structure and function of heterotrimeric G proteins in plants
Journal	Plant and Cell Physiology
Year	2001
Volume	42
Pages	789-794
Author	Fujisawa Y Kato H Iwasaki Y
Abstract	Summary: Heterotrimeric G proteins are mediators that transmit the external signals via receptor molecules to effector molecules. The G proteins consist of three different subunits: alpha, beta, and gamma subunits. The cDNAs or genes for all the alpha, beta, amd gamma subunits have been isolated from many plant species, which has contributed to great progress in the study of the structure and function of the G proteins in plants. In addition, rice plants lacking the alpha subunit were generated by the antisense method and a rice mutant, Daikoku d1, was found to have mutation in the alpha-subunit gene. Both plants show abnormal morphology such as dwarfism, dark green leaf, and small round seed. The findings revealed that the G proteins are functional molecules regulating some body plans in plants. There is evidence that the plant G proteins participate at least in signaling of gibberellin at low concentrations. In this review, we summarize the currently known information on the structure of plant heterotrimeric G proteins and discuss the possible functions of the G proteins in plants
External Databases	Pubmed: 11522903
Keyword	[ Hide all but 1 of 39 ] addition alpha alpha-subunit antisense arabidopsis thaliana beta-subunit bodies cdna dark function g protein gamma gamma-subunit gene gene expression gibberellin gibberellin signal-transduction gtp binding proteins heterotrimeric g protein inward k+ channel method molecular cloning molecule morphology mutant mutation phospholipase-d plasma membrane protein receptor review rice rice mutant rice plant seed signal signal transduction structure subunit

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