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Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety.
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| Zeitschriftentitel: | Proceedings of the National Academy of Sciences |
|---|---|
| Personen und Körperschaften: | , |
| In: | Proceedings of the National Academy of Sciences, 89, 1992, 16, S. 7546-7550 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Proceedings of the National Academy of Sciences
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| Schlagwörter: |
| author_facet |
Cao, G J Sarkar, N Cao, G J Sarkar, N |
|---|---|
| author |
Cao, G J Sarkar, N |
| spellingShingle |
Cao, G J Sarkar, N Proceedings of the National Academy of Sciences Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. Multidisciplinary |
| author_sort |
cao, g j |
| spelling |
Cao, G J Sarkar, N 0027-8424 1091-6490 Proceedings of the National Academy of Sciences Multidisciplinary http://dx.doi.org/10.1073/pnas.89.16.7546 <jats:p>Although it has been known for some time that bacterial mRNA molecules carry polyadenylate moieties at their 3' ends, nothing is known about the molecular structure of bacterial poly(A) RNA. To define the polyadenylylation site of a specific bacterial mRNA, we took advantage of the presence of elevated levels of poly(A) RNA in cells of Escherichia coli deficient in exoribonucleases and synthesized DNA complementary to polyadenylylated lipoprotein mRNA, encoded by the lpp gene, by using avian myeloblastosis virus reverse transcriptase and an oligo(dT)-containing primer. The 5'-terminal portion of the cDNA was amplified by the polymerase chain reaction and appropriate oligonucleotide primers, and the amplified DNA was cloned in pUC18 and subjected to nucleotide sequence analysis. Four clones were found to contain the entire 3'-terminal coding region of lpp mRNA, with poly(A) attached to either of two sites in the downstream untranslated region of the transcript. In one type of clone, the polyadenylate moiety was attached at the putative transcription termination site of lpp mRNA, whereas other clones lacked the stem-loop structure of the rho-independent transcription terminator and the polyadenylate moiety was attached to the residue just preceding the terminal stem-loop of the primary transcript. A model for the polyadenylylation of bacterial mRNA is proposed in which poly(A) polymerase and exonucleases compete for the 3' ends of mRNA molecules.</jats:p> Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. Proceedings of the National Academy of Sciences |
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| title |
Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_unstemmed |
Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_full |
Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_fullStr |
Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_full_unstemmed |
Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_short |
Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_sort |
poly(a) rna in escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| topic |
Multidisciplinary |
| url |
http://dx.doi.org/10.1073/pnas.89.16.7546 |
| publishDate |
1992 |
| physical |
7546-7550 |
| description |
<jats:p>Although it has been known for some time that bacterial mRNA molecules carry polyadenylate moieties at their 3' ends, nothing is known about the molecular structure of bacterial poly(A) RNA. To define the polyadenylylation site of a specific bacterial mRNA, we took advantage of the presence of elevated levels of poly(A) RNA in cells of Escherichia coli deficient in exoribonucleases and synthesized DNA complementary to polyadenylylated lipoprotein mRNA, encoded by the lpp gene, by using avian myeloblastosis virus reverse transcriptase and an oligo(dT)-containing primer. The 5'-terminal portion of the cDNA was amplified by the polymerase chain reaction and appropriate oligonucleotide primers, and the amplified DNA was cloned in pUC18 and subjected to nucleotide sequence analysis. Four clones were found to contain the entire 3'-terminal coding region of lpp mRNA, with poly(A) attached to either of two sites in the downstream untranslated region of the transcript. In one type of clone, the polyadenylate moiety was attached at the putative transcription termination site of lpp mRNA, whereas other clones lacked the stem-loop structure of the rho-independent transcription terminator and the polyadenylate moiety was attached to the residue just preceding the terminal stem-loop of the primary transcript. A model for the polyadenylylation of bacterial mRNA is proposed in which poly(A) polymerase and exonucleases compete for the 3' ends of mRNA molecules.</jats:p> |
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| description | <jats:p>Although it has been known for some time that bacterial mRNA molecules carry polyadenylate moieties at their 3' ends, nothing is known about the molecular structure of bacterial poly(A) RNA. To define the polyadenylylation site of a specific bacterial mRNA, we took advantage of the presence of elevated levels of poly(A) RNA in cells of Escherichia coli deficient in exoribonucleases and synthesized DNA complementary to polyadenylylated lipoprotein mRNA, encoded by the lpp gene, by using avian myeloblastosis virus reverse transcriptase and an oligo(dT)-containing primer. The 5'-terminal portion of the cDNA was amplified by the polymerase chain reaction and appropriate oligonucleotide primers, and the amplified DNA was cloned in pUC18 and subjected to nucleotide sequence analysis. Four clones were found to contain the entire 3'-terminal coding region of lpp mRNA, with poly(A) attached to either of two sites in the downstream untranslated region of the transcript. In one type of clone, the polyadenylate moiety was attached at the putative transcription termination site of lpp mRNA, whereas other clones lacked the stem-loop structure of the rho-independent transcription terminator and the polyadenylate moiety was attached to the residue just preceding the terminal stem-loop of the primary transcript. A model for the polyadenylylation of bacterial mRNA is proposed in which poly(A) polymerase and exonucleases compete for the 3' ends of mRNA molecules.</jats:p> |
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| spelling | Cao, G J Sarkar, N 0027-8424 1091-6490 Proceedings of the National Academy of Sciences Multidisciplinary http://dx.doi.org/10.1073/pnas.89.16.7546 <jats:p>Although it has been known for some time that bacterial mRNA molecules carry polyadenylate moieties at their 3' ends, nothing is known about the molecular structure of bacterial poly(A) RNA. To define the polyadenylylation site of a specific bacterial mRNA, we took advantage of the presence of elevated levels of poly(A) RNA in cells of Escherichia coli deficient in exoribonucleases and synthesized DNA complementary to polyadenylylated lipoprotein mRNA, encoded by the lpp gene, by using avian myeloblastosis virus reverse transcriptase and an oligo(dT)-containing primer. The 5'-terminal portion of the cDNA was amplified by the polymerase chain reaction and appropriate oligonucleotide primers, and the amplified DNA was cloned in pUC18 and subjected to nucleotide sequence analysis. Four clones were found to contain the entire 3'-terminal coding region of lpp mRNA, with poly(A) attached to either of two sites in the downstream untranslated region of the transcript. In one type of clone, the polyadenylate moiety was attached at the putative transcription termination site of lpp mRNA, whereas other clones lacked the stem-loop structure of the rho-independent transcription terminator and the polyadenylate moiety was attached to the residue just preceding the terminal stem-loop of the primary transcript. A model for the polyadenylylation of bacterial mRNA is proposed in which poly(A) polymerase and exonucleases compete for the 3' ends of mRNA molecules.</jats:p> Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. Proceedings of the National Academy of Sciences |
| spellingShingle | Cao, G J, Sarkar, N, Proceedings of the National Academy of Sciences, Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety., Multidisciplinary |
| title | Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_full | Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_fullStr | Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_full_unstemmed | Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_short | Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_sort | poly(a) rna in escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| title_unstemmed | Poly(A) RNA in Escherichia coli: nucleotide sequence at the junction of the lpp transcript and the polyadenylate moiety. |
| topic | Multidisciplinary |
| url | http://dx.doi.org/10.1073/pnas.89.16.7546 |