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. 1990 Jun 25;18(12):3459–3466. doi: 10.1093/nar/18.12.3459

Amplification of plant U3 and U6 snRNA gene sequences using primers specific for an upstream promoter element and conserved intragenic regions.

C Marshallsay 1, T Kiss 1, W Filipowicz 1
PMCID: PMC330997  PMID: 2362803

Abstract

U-snRNA genes in higher plants contain two essential promoter elements, the USE with sequence RTCCCACATCG and the TATA-like box, positioned in the -70 and -30 regions, respectively. Using an oligodeoxynucleotide containing the USE motif and oligodeoxynucleotides specific for the intragenic regions conserved in U-snRNAs, several sequences encoding U6 and U3 snRNAs were determined by polymerase chain reaction (PCR) amplification of Arabidopsis thaliana and tobacco genomic DNAs. This method provides a simple and rapid procedure for characterisation of plant U-snRNA genes and their promoters. It could also be used for the characterisation of other genes containing conserved upstream promoter elements. PCR-derived fragments were used as probes for the isolation of the U3 snRNA genes from a genomic library of Arabidopsis. Two isolated U3 genes were shown to be active when transfected into protoplasts of Nicotiana plumbaginifolia. Both U3 genes contain the USE and TATA-like upstream elements located in similar positions to the U6 genes of Arabidopsis. The encoded Arabidopsis U3 snRNAs can be folded into a secondary structure which is more similar to that of U3 RNAs from lower eukaryotes rather than from metazoa.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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