ArticlePlant molecular biology2009
A protein related to prokaryotic UMP kinases is involved in psaA/B transcript accumulation in Arabidopsis.
Article in Plant molecular biology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 17 citations in OpenAlex.
- A splicing site change between exon 5 and 6 of the nuclear-encoded chloroplast-localizedFrontiers in plant science · 2023Article
- Genetic mapping of green curd gene Gr in cauliflower.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2020Article
- Pyrimidine Salvage: Physiological Functions and Interaction with Chloroplast Biogenesis.Plant physiology · 2019Article
- UMP Kinase Regulates Chloroplast Development and Cold Response in Rice.International journal of molecular sciences · 2019Article
- PUMPKIN, the Sole Plastid UMP Kinase, Associates with Group II Introns and Alters Their Metabolism.Plant physiology · 2019Article
- UMP kinase activity is involved in proper chloroplast development in rice.Photosynthesis research · 2018Article
- Map-based cloning and functional analysis of YGL8, which controls leaf colour in rice (Oryza sativa).BMC plant biology · 2016Article
- Modified Clp protease complex in the ClpP3 null mutant and consequences for chloroplast development and function in Arabidopsis.Plant physiology · 2013Article
- The Arabidopsis nox mutant lacking carotene hydroxylase activity reveals a critical role for xanthophylls in photosystem I biogenesis.The Plant cell · 2013Article
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Dpt1 (defect in p saA/B transcript accumulation 1) is a novel photosystem (PS) I mutant in Arabidopsis. dpt1 mutants fail to grow photoautotrophically, and are impaired in the accumulation of psaA/B transcripts while the transcript levels for the remaining PSI subunits, for subunits of the PSII, the cyt-b ( 6 )/f-complex, and the ribulose-1,5-bisphosphate carboxylase are comparable to the wild type. In-organello run-on transcription assays demonstrate that the lower psaA/B transcript abundance in dpt1-1 is not caused by the inability to transcribe the psaA/psaB/rps14 operon. psaA/B transcripts in the mutant are associated with polyribosomes and translated. Thus, the mutation affects post-transcriptional processes specific for psaA/B. The dpt1 gene was isolated by map-based cloning. The protein is localized in the stroma of the chloroplast and exhibits striking similarities to UMP kinases of prokaryotic origin. Our results show that the nuclear encoded protein Dpt1 is essential for retaining photosynthetic activity in higher plant chloroplasts and involved in post-transcriptional steps of psaA/B transcript accumulation. We discuss that Dpt1 may be a bifunctional protein that couples the pyrimidine metabolism to the photosynthetic electron transport.
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