Extrachloroplastic Site of Synthesis of Three Chloroplast Proteins in Maize (Zea mays)
| Autor: | Douglas D. Randall, L. A. Kleczkowski, C. A. Zeiher |
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| Rok vydání: | 1987 |
| Předmět: | |
| Zdroj: | Zeitschrift für Naturforschung C. 42:1113-1115 |
| ISSN: | 1865-7125 0939-5075 |
| DOI: | 10.1515/znc-1987-9-1019 |
| Popis: | Activities of acetyl-CoA synthetase (EC 6.2.1.1), adenylate kinase (EC 2.7.4.3) and glycerate kinase (EC 2.7.1.31) were found in leaf extracts of iojap mutant maize (Zea mays) which lacks the protein-synthesizing apparatus in plastids. These activities represented at least one-half of the rates observed for normal maize plants. Since the proteins studied are localized either preferentially (adenylate kinase) or exclusively (acetyl-CoA synthetase, glycerate kinase) in chloroplasts, the high activities seen for iojap mutant can not be attributed to some outerchloroplastic isoforms of these enzymes. The data indicate that in maize the three proteins are synthesized by an outerchloroplastic translation system. |
| Databáze: | OpenAIRE |
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