PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression

Pfalz J, Liere K, Kandlbinder A, Dietz K-J, Oelmüller R (2006)
PLANT CELL 18(1): 176-197.

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Abstract
Transcription in plastids is mediated by a plastid-encoded multimeric (PEP) and a nuclear-encoded single-subunit RNA polymerase (NEP) and a still unknown number of nuclear-encoded factors. By combining gel filtration and affinity chromatography purification steps, we isolated transcriptionally active chromosomes from Arabidopsis thaliana and mustard (Sinapis alba) chloroplasts and identified 35 components by electrospray ionization ion trap tandem mass spectrometry. Eighteen components, called plastid transcriptionally active chromosome proteins (pTACs), have not yet been described. T-DNA insertions in three corresponding genes, ptac2, -6, and -12, are lethal without exogenous carbon sources. Expression patterns of the plastid-encoded genes in the corresponding knockout lines resemble those of Delta rpo mutants. For instance, expression of plastid genes with PEP promoters is downregulated, while expression of genes with NEP promoters is either not affected or upregulated in the mutants. All three components might also be involved in posttranscriptional processes, such as RNA processing and/or mRNA stability. Thus, pTAC2, -6, and -12 are clearly involved in plastid gene expression.
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Pfalz J, Liere K, Kandlbinder A, Dietz K-J, Oelmüller R. PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression. PLANT CELL. 2006;18(1):176-197.
Pfalz, J., Liere, K., Kandlbinder, A., Dietz, K. - J., & Oelmüller, R. (2006). PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression. PLANT CELL, 18(1), 176-197.
Pfalz, J., Liere, K., Kandlbinder, A., Dietz, K. - J., and Oelmüller, R. (2006). PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression. PLANT CELL 18, 176-197.
Pfalz, J., et al., 2006. PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression. PLANT CELL, 18(1), p 176-197.
J. Pfalz, et al., “PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression”, PLANT CELL, vol. 18, 2006, pp. 176-197.
Pfalz, J., Liere, K., Kandlbinder, A., Dietz, K.-J., Oelmüller, R.: PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression. PLANT CELL. 18, 176-197 (2006).
Pfalz, J, Liere, K, Kandlbinder, Andrea, Dietz, Karl-Josef, and Oelmüller, R. “PTAC2,-6, and-12 are components of the transcriptionally active plastid chromosome that are required for plastid gene expression”. PLANT CELL 18.1 (2006): 176-197.
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