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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Scandalios, J. G. Zhu, D. |
| Description | Author Affiliation: Zhu D ( Department of Genetics, North Carolina State University, Raleigh 27695.); |
| Abstract | We have isolated maize cDNAs encoding three manganese-containing superoxide dismutases (MnSODs) distinct from the one previously reported. Molecular analyses indicate that multiple MnSOD transcripts are encoded by different, though similar, genes in the maize genome. A single MnSOD gene has been reported in all other organisms examined to date. The deduced amino acid sequences show that these maize MnSOD proteins have a mitochondrial transit peptide and that the first 9 amino acids (matrix-targeting sequence) in the transit peptide are conserved. This suggests that all the maize MnSOD proteins are mitochondria-associated isozymes. RNA blot analysis demonstrated that each member of the maize MnSOD multigene family is both spatially and developmentally regulated. One gene, Sod3.3, was predominantly expressed in the embryo late in embryogenesis. Patterns of increased Mn-SOD transcript accumulation are shown to be associated with increased mitochondrial activity during plant growth and development. The influence of mitochondrial metabolism on the expression of the nuclear MnSOD genes is discussed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 20 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Genes, Plant Superoxide Dismutase Genetics Zea Mays Amino Acid Sequence DNA, Complementary DNA, Mitochondrial Gene Expression Manganese Mitochondria Metabolism Molecular Sequence Data Multigene Family Oligonucleotide Probes RNA, Messenger Sequence Alignment Sequence Homology Tissue Distribution Embryology Growth & Development Comparative Study Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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