1qyr is a 2 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
RSMA_ECOLI Specifically dimethylates two adjacent adenosines (A1518 and A1519) in the loop of a conserved hairpin near the 3'-end of 16S rRNA in the 30S particle. May play a critical role in biogenesis of 30S subunits. Has also a DNA glycosylase/AP lyase activity that removes C mispaired with oxidized T from DNA, and may play a role in protection of DNA against oxidative stress.[1][2][3]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
↑van Buul CP, van Knippenberg PH. Nucleotide sequence of the ksgA gene of Escherichia coli: comparison of methyltransferases effecting dimethylation of adenosine in ribosomal RNA. Gene. 1985;38(1-3):65-72. PMID:3905517
↑Zhang-Akiyama QM, Morinaga H, Kikuchi M, Yonekura S, Sugiyama H, Yamamoto K, Yonei S. KsgA, a 16S rRNA adenine methyltransferase, has a novel DNA glycosylase/AP lyase activity to prevent mutations in Escherichia coli. Nucleic Acids Res. 2009 Apr;37(7):2116-25. doi: 10.1093/nar/gkp057. Epub 2009 Feb, 17. PMID:19223326 doi:10.1093/nar/gkp057
↑Connolly K, Rife JP, Culver G. Mechanistic insight into the ribosome biogenesis functions of the ancient protein KsgA. Mol Microbiol. 2008 Dec;70(5):1062-75. doi: 10.1111/j.1365-2958.2008.06485.x. PMID:18990185 doi:10.1111/j.1365-2958.2008.06485.x
