Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active.

Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active. Research Abstract Details 

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Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active. Abstract Text:

Kumiko Miwa,Kuniko Ishikawa,Kazunori Terada,Hisami Yamada,Tomomi Suzuki,Takafumi Yamashino,Takeshi Mizuno,Kumiko Miwa,Kuniko Ishikawa,Kazunori Terada,Hisami Yamada,Tomomi Suzuki,Takafumi Yamashino,Takeshi Mizuno,Kumiko Miwa,Kuniko Ishikawa,Kazunori Terada,Hisami Yamada,Tomomi Suzuki,Takafumi Yamashino,Takeshi Mizuno,

In Arabidopsis, three genes (AHK2, AHK3 and AHK4/CRE1) encode histidine kinases (His-kinases), which serve as cytokinin receptors. To understand how the external cytokinin signal activates the His-kinase across the cell membrane, we exploited the power of microbial genetics to isolate several AHK4 mutants that function independently of cytokinin in both prokaryotic and eukaryotic assay systems. In each mutant, a single amino acid substitution within the second membrane-spanning segment, or within the region around the phosphorylation His site, renders the His-kinase constitutively active. These mutant receptors appear to have a 'locked-on' conformation, even in the absence of stimulus. We discuss the implications of these data for the structure and function of the cytokinin receptor His-kinases in plants.

Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active. Publishing Authors By Initials

K Miwa,K Ishikawa,K Terada,H Yamada,T Suzuki,T Yamashino,T Mizuno,K Miwa,K Ishikawa,K Terada,H Yamada,T Suzuki,T Yamashino,T Mizuno,K Miwa,K Ishikawa,K Terada,H Yamada,T Suzuki,T Yamashino,T Mizuno,

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Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Plant & cell physiology

VOLUME: 48

Page Numbers: 1809-14

Journal Abbreviation: Plant Cell Physiol.

ISSN: 0032-0781

DAY: 23

MONTH: 10

YEAR: 2007

Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active. Information

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LANGUAGE: eng

NlmUniqueID: 9430925

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Grant and Affiliation Information for Identification of Amino Acid Substitutions that Render the Arabidopsis Cytokinin Receptor Histidine Kinase AHK4 Constitutively Active.

AFFILIATION: Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University, Furocho, Chikusa-ku, Nagoya, 464-8601 Japan.

Country: Japan

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MEDLINETA: Plant Cell Physiol

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