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. 1991 Nov;10(11):3379–3386. doi: 10.1002/j.1460-2075.1991.tb04902.x

Anatomy of the parp gene promoter of Trypanosoma brucei.

D R Sherman 1, L Janz 1, M Hug 1, C Clayton 1
PMCID: PMC453066  PMID: 1840521

Abstract

While growing in the tsetse fly, Trypanosoma brucei expresses a major surface glycoprotein, the procyclic acidic repetitive protein (PARP). The parp genes are transcribed by an alpha-amanitin-resistant RNA polymerase. We have determined the sequence requirements for parp promoter activity. Studies of RNA produced from input DNA in transiently transfected trypanosomes indicate that the RNA is correctly processed by trans-splicing and polyadenylation. Deletion analyses show that 330 bp are sufficient for full promoter and splicing activity and that the promoter structure is complex, involving at least three elements whose mutual spacing is important. Mutagenesis pin-pointed two sequences vital for promoter activity; neither bears any resemblance to known prokaryotic or eukaryotic promoter elements.

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Selected References

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