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Sequence Name:	T0978
Target:
Sequence(s):	>Salmonella montevideo DpdA MSKLKYFFPDSQDFIDPSFDFVRETRNEHRVRQRDDHYPHEVFPHPYDGMLVSKAVVDGLGGGESKYTRAQRLRYFRNGMKHFFRLPDNMQTMGDCGAFTYVNQDVPPYRVEEVIEFYETSRFNYGVSLDHIIFGYEKPGESFSGEVLAECRRRQDITLTLAQDFLVKSQKSCFTPFGVAHGWNKKSYRQSVEALLAMGYKNITMGGMVPLKTAQILETLEEIKPLLKSDTQVHLLGIARPESFADFIRLGVTSIDSTTPLQQAFKDRKNNYHTPEGRAYTAVRVPQFDANPSLSRKIKSGVIDQDVARHLEKDAMHALFEYDNNALSLEKTLEAVLAYERLHSGEKEAEKIRADYERTLGDRPWRKCECNICRSIGINVIIFRGAERNRRRGFHNIQVLYNRLQYTLSLRSEDKS
Comments:
Subunit(s):	1
Target List Comments:
PDB Code:
Chain:
Is Server Only:
Is CAPRI:
Release date:	Today Tomorrow Day After Tomorrow Next Monday
Server Expiration:
Soft Expiration:
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Sequence summary:	Sequence TSID: 75 Target: T0978 SEQUENCE : >Salmonella montevideo DpdA MSKLKYFFPDSQDFIDPSFDFVRETRNEHRVRQRDDHYPHEVFPHPYDGMLVSKAVVDGLGGGESKYTRAQRLRYFRNGMKHFFRLPDNMQTMGDCGAFTYVNQDVPPYRVEEVIEFYETSRFNYGVSLDHIIFGYEKPGESFSGEVLAECRRRQDITLTLAQDFLVKSQKSCFTPFGVAHGWNKKSYRQSVEALLAMGYKNITMGGMVPLKTAQILETLEEIKPLLKSDTQVHLLGIARPESFADFIRLGVTSIDSTTPLQQAFKDRKNNYHTPEGRAYTAVRVPQFDANPSLSRKIKSGVIDQDVARHLEKDAMHALFEYDNNALSLEKTLEAVLAYERLHSGEKEAEKIRADYERTLGDRPWRKCECNICRSIGINVIIFRGAERNRRRGFHNIQVLYNRLQYTLSLRSEDKS NUMBER_OF_AA : 416 REAL_NUMBER_OF_AA : 416 SGI_CENTER : Others OLIGOMERIC_STATE : monomer BINDING_SITES : LIGANDS : guanine and Zn2+ STOICHIOMETRY : A1 DISORDER : SOLVENT : 10% (w/v) polyethylene glycol 8000, 8% (v/v) ethylene glycol, and 0.1 M HEPES pH 7.5, 0.5 mM guanine, 0.1 mM ZnCl2, 3 mM GSH/GSSH PROTEIN_MATERIAL : YES EXPRESSION : E. coli BLAST_INFO : HHSEARCH_INFO : DIFFICULTY : Other info : DpdA is annotated in the genomic databases as a tRNA guanine transglycosylase. However, its true function was determined to be the insertion of preQ0, a stable precursor to the modified nucleoside queuosine in DNA of bacteria and phage. Queuosine is a 7-deazaguanosine modification of the wobble position of tRNAs and has been studied extensively by us and other groups. Its recent discovery in the DNA of bacteria and phage is novel, and opens the field of DNA modification to studies beyond the known methylation of DNA, and highlights the cross-talk between RNA and DNA metabolism. Preliminary results show that queuosine modification of DNA by DpdA confers resistance against foreign endonucleoases, implying an ancient role in restriction-modification and defense against foreign DNA.

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