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| Content Provider | PubMed Central |
|---|---|
| Author | Luethy, M. H. Thelen, J. J. Knudten, A. F. Elthon, T. E. |
| Abstract | An NADH dehydrogenase activity from red beet (Beta vulgaris L.) root mitochondria was purified to a 58-kD protein doublet. An immunologically related dehydrogenase was partially purified from maize (Zea mays L. B73) mitochondria to a 58-kD protein doublet, a 45-kD protein, and a few other less prevalent proteins. Polyclonal antibodies prepared against the 58-kD protein of red beet roots were found to immunoprecipitate the NAD(P)H dehydrogenase activity. The antibodies cross-reacted to similar proteins in mitochondria from a number of plant species but not to rat liver mitochondrial proteins. The polyclonal antibodies were used in conjunction with maize mitochondrial fractionation to show that the 58-kD protein was likely part of a protein complex loosely associated with the membrane fraction. A membrane-impermeable protein cross-linking agent was used to further show that the majority of the 58-kD protein was located on the outer surface of the inner mitochondrial membrane or in the intermembrane space. Analysis of the cross-linked 58-kD NAD(P)H dehydrogenase indicated that specific proteins of 64, 48, and 45 kD were cross-linked to the 58-kD protein doublet. The NAD(P)H dehydrogenase activity was not affected by ethyleneglycol-bis([beta]-aminoethyl ether)-N,N[prime] -tetraacetic acid or CaCl2, was stimulated somewhat (21%) by flavin mononucleotide, was inhibited by p-chloromercuribenzoic acid (49%) and mersalyl (40%), and was inhibited by a bud scale extract of Platanus occidentalis L. containing platanetin (61%). |
| Starting Page | 443 |
| File Format | |
| ISSN | 15322548 |
| e-ISSN | 15322548 |
| Journal | Plant Physiology |
| Issue Number | 2 |
| Volume Number | 107 |
| Language | English |
| Publisher Date | 1995-02-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Physiology Plant Science |
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