| Legumains and their functions in plants. | |
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MedLine Citation:
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PMID: 12167328 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Legumains are a family of plant and animal Asn-specific cysteine proteinases with extra-cytoplasmic localization in vacuoles or cell walls. Plant legumains are involved in Asn-specific propolypeptide processing during, for example, storage-protein deposition in maturing seeds, when these proteins are resistant against degradation by legumains. With the transition to germination and subsequent seedling growth, storage proteins are opened to unlimited cleavage by legumains, which now contribute to protein mobilization. Here, we suggest a hypothesis that unifies both functions of legumains. Their action as propolypeptide-processing or protein-degrading enzymes is naturally controlled by the conformational state of their substrates, which undergo development- or environment-dependent changes. The suggested substrate conformation-dependent differential roles of legumains might not be restricted to seeds but could also apply to cells of different tissues in vegetative organs. |
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Authors:
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Klaus Müntz; Andrei D Shutov |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Trends in plant science Volume: 7 ISSN: 1360-1385 ISO Abbreviation: Trends Plant Sci. Publication Date: 2002 Aug |
Date Detail:
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Created Date: 2002-08-08 Completed Date: 2002-10-02 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9890299 Medline TA: Trends Plant Sci Country: England |
Other Details:
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Languages: eng Pagination: 340-4 Citation Subset: IM |
Affiliation:
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Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Gatersleben, Germany. muentz@IPK-gatersleben.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acid Sequence Cell Wall / enzymology Cysteine Endopeptidases / biosynthesis, classification, genetics, metabolism* Evolution Gene Expression Regulation, Plant Plants / cytology, enzymology*, genetics, metabolism Protein Conformation Protein Processing, Post-Translational* Protein Transport Seeds / enzymology Substrate Specificity Vacuoles / enzymology |
| Chemical | |
Reg. No./Substance:
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EC 3.4.22.-/Cysteine Endopeptidases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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