Organization and post-transcriptional processing of the psb B operon from chloroplasts of Populus deltoides

Chloroplast genes are typically organized into polycistronic transcription units that give rise to complex sets of mono- and oligo-cistronic overlapping RNAs through a series of processing steps. The psbB operon contains genes for the PSII (psbB, psbT, psbH) and cytochrome b(6)f (petB and petD) comp...

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Bibliographic Details
Published in:Current genetics 1999-09, Vol.36 (3), p.165-172
Main Authors: Dixit, R, Trivedi, P.K, Nath, P, Sane, P.V
Format: Article
Language:English
Subjects:
alternative splicing
Amino Acid Sequence
amino acid sequences
Base Sequence
Blotting, Northern
chloroplast DNA
Chloroplasts - genetics
cytochrome b
cytochromes
genbank/y13328
gene expression
Gene Expression Regulation, Plant
genes
genomics
Light-Harvesting Protein Complexes
messenger RNA
Models, Genetic
Molecular Sequence Data
nucleotide sequences
open reading frames
Operon
Photosynthetic Reaction Center Complex Proteins - genetics
photosystem II
Photosystem II Protein Complex
plant proteins
Plant Proteins - genetics
Populus deltoides
promoter regions
Recombinant Proteins - genetics
RNA Processing, Post-Transcriptional - genetics
Sequence Analysis, DNA
transcription (genetics)
Trees - genetics
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Summary:Chloroplast genes are typically organized into polycistronic transcription units that give rise to complex sets of mono- and oligo-cistronic overlapping RNAs through a series of processing steps. The psbB operon contains genes for the PSII (psbB, psbT, psbH) and cytochrome b(6)f (petB and petD) complexes which are needed in different amounts during chloroplast biogenesis. The functional significance of gene organization in this polycistronic unit, containing information for two different complexes, is not known and is of interest. To determine the organization and expression of these complexes, studies have been carried out on crop plants by different groups, but not much information is known about trees. We present the nucleotide sequences of PSII genes and RNA profiles of the genes located in the psbB operon from Populus deltoides, a tree species. Although the gene organization of this operon in P. deltoides is similar to that in other species, a few variations have been observed in the processing scheme.
ISSN:0172-8083
1432-0983
DOI:10.1007/s002940050487