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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Coleman, C. E. Lopes, M. A. Boston, R. S. Gillikin, J. W. Larkins, B. A. |
| Description | Author Affiliation: Coleman CE ( Department of Plant Sciences, University of Arizona, Tucson 85721, USA.); |
| Abstract | The maize floury 2 (fl2) mutation enhances the lysine content of the grain, but the soft texture of the endosperm makes it unsuitable for commercial production. The mutant phenotype is linked with the appearance of a 24-kDa alpha-zein protein and increased synthesis of binding protein, both of which are associated with irregularly shaped protein bodies. We have cloned the gene encoding the 24-kDa protein and show that it is expressed as a 22-kDa alpha-zein with an uncleaved signal peptide. Comparison of the deduced N-terminal amino acid sequence of the 24-kDa alpha-zein protein with other alpha-zeins revealed an alanine to valine substitution at the C-terminal position of the signal peptide, a histidine insertion within the seventh alpha-helical repeat, and an alanine to threonine substitution with the same alpha-helical repeat of the protein. Structural defects associated with this alpha-zein explain many of the phenotypic effects of the fl2 mutation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 15 |
| Volume Number | 92 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1995-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Lysine Mutation Protein Sorting Signals Genetics Zea Mays Zein Amino Acid Sequence Blotting, Southern Cloning, Molecular Electrophoresis, Gel, Two-Dimensional Genetic Linkage Molecular Sequence Data Polymorphism, Restriction Fragment Length Protein Precursors Protein Processing, Post-Translational Chemistry Sequence Analysis Sequence Homology, Amino Acid Comparative Study Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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