title: Systematic single base-pair substitution analysis of DNA binding by the cAMP receptor protein in cyanobacterium Synechocystis sp. PCC 6803.
abstract: The cAMP receptor protein SYCRP1 in cyanobacterium Synechocystis sp. PCC 6803 is a regulatory protein that binds to the consensus DNA sequence (5'-AAATGTGATCTAGATCACATTT-3') for the cAMP receptor protein CRP in Escherichia coli. Here we examined the effects of systematic single base-pair substitutions at positions 4-8 (TGTGA) of the consensus sequence on the specific binding of SYCRP1. The consensus sequence exhibited the highest affinity, and the effects of base-pair substitutions at positions 5 and 7 were the most deleterious. The result is similar to that previously reported for CRP, whereas there were differences between SYCRP1 and CRP in the rank order of affinity for each substitution.
authors.affiliation: Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo 153-8902, Japan.
authors.forename: Katsumi
authors.initials: K
authors.lastname: Omagari
authors.forename: Hidehisa
authors.initials: H
authors.lastname: Yoshimura
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Takano
authors.forename: Dongyun
authors.initials: D
authors.lastname: Hao
authors.forename: Masayuki
authors.initials: M
authors.lastname: Ohmori
authors.forename: Akinori
authors.initials: A
authors.lastname: Sarai
authors.forename: Akira
authors.initials: A
authors.lastname: Suyama
mesh_terms: D000595:Amino Acid Sequence; D001482:Base Composition; D020029:Base Pairing; D001483:Base Sequence; D001665:Binding Sites / Q000235:genetics; D016384:Consensus Sequence; D000458:Cyanobacteria / Q000235:genetics*; D002373:Cyclic AMP Receptor Protein / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D016297:Mutagenesis, Site-Directed; D011485:Protein Binding; D017433:Protein Structure, Secondary; D017422:Sequence Analysis, DNA; D013329:Structure-Activity Relationship
chemical_list: D002373:Cyclic AMP Receptor Protein; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins