Incorporation of anthraquinonyl group into lambda-Cro repressor protein for strand- and position-specific photocleavage of double-stranded DNA.
lambda-Cro repressor protein incorporated with a 2-anthraquinonylalanine (anqAla) at the 64th position was chemically synthesized by solid-phase method. The 64th position was selected according to previous information on various mutants of Cro incorporated with a single anqAla unit, that were synthesized through an Escherichia coli in vitro protein-synthesizing system. The 64anqAla mutant bound to a dsDNA of consensus operator sequence and underwent strand- and position-specific photocleavage of the dsDNA at the GG sequence after treatment with piperidine. The mutant also underwent position-specific self-photoscission. The self-photoscission was retarded in the presence of the dsDNA.
Department of Bioscience and Biotechnology, Faculty of Engineering, Okayama University 3-1-1 Tsushimanaka, Okayama 700-8530, Japan.
Hiroshi
H
Sasaki
Kazumasa
K
Ikeda
Maya
M
Suzuki
Keiko
K
Ninomiya
Masahiko
M
Sisido
D000595:Amino Acid Sequence; D000880:Anthraquinones / Q000737:chemistry*; D010582:Bacteriophage lambda / Q000737:chemistry*; D001483:Base Sequence; D001665:Binding Sites; D004247:DNA / Q000737:chemistry* / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000737:chemistry / Q000378:metabolism; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010777:Photochemistry; D012097:Repressor Proteins / Q000737:chemistry* / Q000378:metabolism; D014764:Viral Proteins / Q000737:chemistry* / Q000378:metabolism; D054334:Viral Regulatory and Accessory Proteins
D000880:Anthraquinones; D004268:DNA-Binding Proteins; D012097:Repressor Proteins; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins; C016649:phage repressor proteins; D004247:DNA