ArticleThe Plant cell2007
The thylakoid lumen protease Deg1 is involved in the repair of photosystem II from photoinhibition in Arabidopsis.
Article in The Plant cell, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 95 papers.
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95 citing papers in PubMed, 224 citations in OpenAlex.
- The GreenCut protein TEF6 maintains photosystem II homeostasis under high light by stabilizing FtsH accumulation in Chlamydomonas reinhardtii.Plant communications · 2026Article
- What are grana in chloroplasts of vascular plants good for?Annals of botany · 2026Review
- From quantitative trait loci towards mechanisms: Linkage Integration Hypothesis Testing (LIgHT) sheds light on the mechanisms of genetically modulated stress tolerance.Journal of experimental botany · 2025Article
- Proteostasis and protein quality control in chloroplasts: mechanisms and novel insights related to protein mislocalization.Journal of experimental botany · 2025Review
- Roles of multiple TEF30-associated intermediate complexes in the repair and reassembly of photosystem II in Chlamydomonas reinhardtii.Nature plants · 2025Article
- Characterization of Arabidopsis thaliana thylakoid lumen 7.6 protein functions in photosystem II assembly.Communications biology · 2025Article
- The thylakoid lumen Deg1 protease affects non-photochemical quenching via the levels of violaxanthin de-epoxidase and PsbS.The Plant journal : for cell and molecular biology · 2025Article
- Assembly and Repair of Photosystem II inPlants (Basel, Switzerland) · 2024Review
- Fine mapping and candidate gene analysis of qSB12TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023Article
- Chloroplast gene expression: Recent advances and perspectives.Plant communications · 2023Review
- A large deletion conferring pale green leaves of maize.BMC plant biology · 2023Article
- Photosynthetic acclimation to changing environments.Biochemical Society transactions · 2023Review
- Research progress on maintaining chloroplast homeostasis under stress conditions: a review.Acta biochimica et biophysica Sinica · 2023Review
- Chloroplast proteostasis: A story of birth, life, and death.Plant communications · 2023Review
- Downregulated expression ofPhotosynthetica · 2023Article
- Chloroplasts Protein Quality Control and Turnover: A Multitude of Mechanisms.International journal of molecular sciences · 2022Review
- Recent Advances in Understanding the Structural and Functional Evolution of FtsH Proteases.Frontiers in plant science · 2022Review
- Unraveling the Dichotomy of Enigmatic Serine Protease HtrA2.Frontiers in molecular biosciences · 2022Review
- Molecular origins of induction and loss of photoinhibition-related energy dissipation qScience advances · 2021Article
- Chlamydomonas proteases: classification, phylogeny, and molecular mechanisms.Journal of experimental botany · 2021Article
35 more citing papers are in PubMed but not listed here.
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Deg1 is a Ser protease peripherally attached to the lumenal side of the thylakoid membrane. Its physiological function is unknown, but its localization makes it a suitable candidate for participation in photoinhibition repair by degradation of the photosystem II reaction center protein D1. We transformed Arabidopsis thaliana with an RNA interference construct and obtained plants with reduced levels of Deg1. These plants were smaller than wild-type plants, flowered earlier, were more sensitive to photoinhibition, and accumulated more of the D1 protein, probably in an inactive form. Two C-terminal degradation products of the D1 protein, of 16 and 5.2 kD, accumulated at lower levels compared with the wild type. Moreover, addition of recombinant Deg1 to inside-out thylakoid membranes isolated from the mutant could induce the formation of the 5.2-kD D1 C-terminal fragment, whereas the unrelated proteases trypsin and thermolysin could not. Immunoblot analysis revealed that mutants containing less Deg1 also contain less FtsH protease, and FtsH mutants contain less Deg1. These results suggest that Deg1 cooperates with the stroma-exposed proteases FtsH and Deg2 in degrading D1 protein during repair from photoinhibition by cleaving lumen-exposed regions of the protein. In addition, they suggest that accumulation of Deg1 and FtsH proteases may be coordinated.
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