Abstract:
:A specific polysome immunoadsorption procedure, employing soluble rabbit anti-NADP-GDH IgG and sheep anti-rabbit IgG covalently-linked to an insoluble cellulose matrix, was used to immunoselect polysomes translating mRNA for a chloroplastic ammonium-inducible NADP-GDH in fully induced cells of Chlorella sorokiniana. The immunoselected polysomes were dissociated, and the NADP-GDH mRNA was recovered by oligo (dT)cellulose chromatography. The translatable NADP-GDH mRNA was estimated to be 0.07 and 90% of the total polysomal poly(A)(+)RNA before and after immunoselection of the polysomes, respectively. The immunoadsorption procedure resulted in an 83% recovery and 1,291-fold purification of translatable NADP-GDH mRNA. In vitro translation of the immunoselected poly(A)(+)RNA yielded a single radioactive protein (on sodium dodecyl sufate polyacrylamide gels) with a molecular weight of 58,500, i.e. size of the putative precursor-protein of the NADP-GDH subunit in the holoenzyme in fully induced cells. The purified NADP-GDH mRNA was used for synthesis of a high proportion of nearly full-length single-stranded cDNA and double-stranded cDNA molecules.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Bascomb NF,Turner KJ,Schmidt RRdoi
10.1104/pp.81.2.527subject
Has Abstractpub_date
1986-06-01 00:00:00pages
527-32issue
2eissn
0032-0889issn
1532-2548journal_volume
81pub_type
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