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- W2561572145 abstract "Summary The characterization of mutants with altered leaf shape and pigmentation has previously allowed the identification of nuclear genes that encode plastid‐localized proteins that perform essential functions in leaf growth and development. A large‐scale screen previously allowed us to isolate ethyl methanesulfonate‐induced mutants with small rosettes and pale green leaves with prominent marginal teeth, which were assigned to a phenotypic class that we dubbed Angulata. The molecular characterization of the 12 genes assigned to this phenotypic class should help us to advance our understanding of the still poorly understood relationship between chloroplast biogenesis and leaf morphogenesis. In this article, we report the phenotypic and molecular characterization of the angulata7‐1 ( anu7‐1 ) mutant of Arabidopsis thaliana , which we found to be a hypomorphic allele of the EMB 2737 gene, which was previously known only for its embryonic‐lethal mutations. ANU 7 encodes a plant‐specific protein that contains a domain similar to the central cysteine‐rich domain of DnaJ proteins. The observed genetic interaction of anu7‐1 with a loss‐of‐function allele of GENOMES UNCOUPLED 1 suggests that the anu7‐1 mutation triggers a retrograde signal that leads to changes in the expression of many genes that normally function in the chloroplasts. Many such genes are expressed at higher levels in anu7‐1 rosettes, with a significant overrepresentation of those required for the expression of plastid genome genes. Like in other mutants with altered expression of plastid‐encoded genes, we found that anu7‐1 exhibits defects in the arrangement of thylakoidal membranes, which appear locally unappressed." @default.
- W2561572145 created "2017-01-06" @default.
- W2561572145 creator A5020598101 @default.
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- W2561572145 creator A5078467190 @default.
- W2561572145 creator A5079285289 @default.
- W2561572145 date "2017-02-11" @default.
- W2561572145 modified "2023-10-15" @default.
- W2561572145 title "The<i><scp>ANGULATA</scp>7</i>gene encodes a DnaJ‐like zinc finger‐domain protein involved in chloroplast function and leaf development in Arabidopsis" @default.
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