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Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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BAK1 CDPK either a calcium channel or CDPK either FLS2 or BAK1 a calcium channel FLS2
Transcribed Image Text:BAK1 CDPK either a calcium channel or CDPK either FLS2 or BAK1 a calcium channel FLS2
Ca2+ flg22 calcium channel Cell FLS2 exterior -ВАК1 Cytoplasm of guard cell OP BIK1 CDPK BIK1-mediated channel activation Pathogens are sensed by the receptor protein FLS2, which forms a complex with the BAK1 protein. When this complex senses a bacterial-protein fragment, termed flg22, it adds a phosphate group (P) to the protein BIK1, thereby activating it. BIK1 then phosphorylates the Ca2+ channel to activate it. Ca++ subsequently activates CDPK. bik1++ is an always on/always phosphorylated mutant version of BIK1. bik1++ stomata are always [ Select ] v. bik1++/osca- double mutants are not always open or closed and do not close in the presence of flg22. Solely because this is so, we can infer that OSCA is the gene that is required for the expression of [ Select ]
Transcribed Image Text:Ca2+ flg22 calcium channel Cell FLS2 exterior -ВАК1 Cytoplasm of guard cell OP BIK1 CDPK BIK1-mediated channel activation Pathogens are sensed by the receptor protein FLS2, which forms a complex with the BAK1 protein. When this complex senses a bacterial-protein fragment, termed flg22, it adds a phosphate group (P) to the protein BIK1, thereby activating it. BIK1 then phosphorylates the Ca2+ channel to activate it. Ca++ subsequently activates CDPK. bik1++ is an always on/always phosphorylated mutant version of BIK1. bik1++ stomata are always [ Select ] v. bik1++/osca- double mutants are not always open or closed and do not close in the presence of flg22. Solely because this is so, we can infer that OSCA is the gene that is required for the expression of [ Select ]
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