学科分类
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3 个结果
  • 简介:U7smallnuclearRNA(snRNA)sequenceshavebeendescribedonlyforahandfulofanimalspeciesinthepast.Herewedescribeacomputationalsearchforfunc-tionalU7snRNAgenesthroughoutvertebratesincludingtheupstreamsequenceelementscharacteristicforsnRNAstranscribedbypolymeraseⅡ.Basedontheresultsofthissearch,wediscussthehighvariabilityofU7snRNAsinbothse-quenceandstructure,andreportonanattempttofindU7snRNAsequencesinbasaldeuterostomesandnon-drosophilidsinsectgenomesbasedonacombinationofsequence,structure,andpromoterfeatures.Duetotheextremelyshortse-quenceandthehighvariabilityinbothsequenceandstructure,nounambiguouscandidateswerefound.TheseresultscastdoubtonputativeU7homologsinevenmoredistantorganismsthatarereportedinthemostrecentreleaseoftheRfamdatabase.

  • 标签: U7 SNRNA 非编码RNA RNA分子构造 进化过程