Abstract:
:We have isolated full-length cDNA clones that encode oat (Avena sativa) seed storage globulin mRNAs from a cDNA library in the expression vector lambda gtll. The longest of these clones, pOG2, has an 1840-base pair insert that encodes a complete precursor subunit with a signal peptide of 24 amino acids followed by an acidic polypeptide of 293 amino acids and a basic polypeptide of 201 amino acids. Near the C terminus of the acidic polypeptide are four repeats of a highly conserved, glutamine-rich octapeptide. Other oat globulin cDNA clones contain five of these repeats. Nucleotide sequence comparisons between these clones indicate that the genes encoding these proteins are highly conserved. We estimate there to be 7 to 10 genes for the oat globulin per haploid genome. Comparisons of amino acid sequences show that the oat globulin is 30 to 40% homologous with storage globulins of legumes and about 70% homologous with the rice seed storage globulin (glutelin).
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Shotwell MA,Afonso C,Davies E,Chesnut RS,Larkins BAdoi
10.1104/pp.87.3.698subject
Has Abstractpub_date
1988-07-01 00:00:00pages
698-704issue
3eissn
0032-0889issn
1532-2548journal_volume
87pub_type
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