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  1. ...discussions. This work was supported in part by NIH grant GM36481 to J.D.B. References Bachman N, Eby Y, Boeke JD. 2004. Local definition of Ty1 target preference by long terminal repeats and clustered tRNA genes. Genome Res 14: 1232–1247. Bachman N, Gelbart ME, Tsukiyama T, Boeke JD. 2005. TFIIIB subunit Bdp...
  2. ...showed that tRNA genes (tDNAs) are targeted at widely different frequencies even within isoacceptor families. Ectopic expression of Ty3 integrase (IN) showed that it localized to targets independent of other Ty3 proteins and cDNA. IN, RNAP3, and transcription factor Brf1 were enriched at tDNA targets...
  3. ...the periodic pattern of Ty1 insertion upstream of class III gene targets (Bachman et al. 2005). However, this is likely due to changes in nucleosome positioning, as catalytically inactive ISW2 does not change overall targeting to tRNA genes (Gelbart et al. 2005). Nucleosomes are also preferred targets...
  4. ...novo Ty3 integration sites identified in HTS Target sites Genome alignment Number Proximal genes (cluster ID #) Notes tRNA Single 262 Multiple 2 tL(CAA)G2 tL(CAA)M Not in original data set 11 tD(GUC)B Part of tD-tR tandem pairs, originally assigned to tR tD(GUC)D tD(GUC)J2 tD(GUC)J3 tM(CAU)J3 Sequence...
  5. ...to 400 nucleotides. The association of Tf insertions with pol II promoters was very similar to the preference previously observed for Tf1 integration. We found that the recently active Tf elements were absent from centromeres and pericentromeric regions of the genome containing tandem tRNA gene...
  6. ...protein-coding genes andmore introns than other yeasts andhas a larger variety of transposable elements. It also has several peculiarities, such as multiple subtelomeric rDNA loci and dispersed 5S RNA coding genes, half of which are transcriptionally fused to tRNA genes (Acker et al. 2008). A second...
  7. ...are not randomly distributed in yeast, but are mainly located in genes transcribed by RNA polymerase III, such as tRNA genes ( Kim et al. 1998 ). It is, however, difficult to explain why the non-uniform homolog pairing in Saccharomyes cerevisiae ( Kleckner and Weiner 1993 ), as opposed to the close homolog...
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