| Possible function of VIPP1 in thylakoids: Protection but not formation? | |
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MedLine Citation:
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PMID: 23154508 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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VIPP1 protein in photosynthetic organisms is homologous to bacterial PspA, which protects plasma membrane integrity upon stresses. Despite the proposed role of VIPP1 in thylakoid biogenesis, its precise function remains unclear. Recently, our in-depth analysis of Arabidopsis vipp1 mutants revealed VIPP1's involvement in the maintenance of chloroplast envelopes. Chloroplasts in intact vipp1 leaves exhibited spherical balloon-like morphology, which resulted from osmotic stress across envelopes. In fact, observation of VIPP1 fused to green fluorescence protein in vivo revealed that most VIPP1 is localized as a lattice-like macro complex attached along with the envelope. Because of the proposed function in thylakoids, we examined whether vipp1 also exhibited altered morphologies in thylakoids. Results show that thylakoid morphologies were detected irregularly, but vipp1 chloroplasts retained normal-appearing grana stacks. We infer that VIPP1 might influence thylakoids as well as envelopes, but that it is not involved directly in thylakoid membrane formation. |
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Authors:
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Lingang Zhang; Wataru Sakamoto |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-15 |
Journal Detail:
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Title: Plant signaling & behavior Volume: 8 ISSN: 1559-2324 ISO Abbreviation: Plant Signal Behav Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101291431 Medline TA: Plant Signal Behav Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Institute of Plant Science and Resources; Okayama University; Kurashiki, Okayama, Japan. |
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