Characterization of the subtilase gene family in tomato (Lycopersicon esculentum Mill.)

Characterization of the subtilase gene family in tomato (Lycopersicon esculentum Mill.) The gene family of subtilisin-like serine proteases (subtilases, SBTs) in tomato (Lycopersicon esculentum Mill.) comprises at least 15 members, 12 of which have been characterized in this study. Sequence comparison revealed that tomato subtilases fall into 5 distinct subfamilies. Single genes were shown to exist for LeSBT1, LeSBT2 and tmp, while 5 and 6 genes were found in the LeSBT3/4 and P69 subfamilies, respectively. With the exception of tmp, tomato subtilase genes were found to lack introns. Expression of subtilase genes was confirmed at the mRNA level by northern blot analysis and/or by primer extension experiments. For each of the 5 subtilase subfamilies, a distinctive pattern of expression was observed in tomato organs. At least one of the subtilases was found to be expressed in each organ analysed. Structural features evident from deduced amino acid sequences are discussed with reference to the related mammalian proprotein convertases. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Characterization of the subtilase gene family in tomato (Lycopersicon esculentum Mill.)

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Publisher
Springer Journals
Copyright
Copyright © 1999 by Kluwer Academic Publishers
Subject
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1023/A:1006193414434
Publisher site
See Article on Publisher Site

Abstract

The gene family of subtilisin-like serine proteases (subtilases, SBTs) in tomato (Lycopersicon esculentum Mill.) comprises at least 15 members, 12 of which have been characterized in this study. Sequence comparison revealed that tomato subtilases fall into 5 distinct subfamilies. Single genes were shown to exist for LeSBT1, LeSBT2 and tmp, while 5 and 6 genes were found in the LeSBT3/4 and P69 subfamilies, respectively. With the exception of tmp, tomato subtilase genes were found to lack introns. Expression of subtilase genes was confirmed at the mRNA level by northern blot analysis and/or by primer extension experiments. For each of the 5 subtilase subfamilies, a distinctive pattern of expression was observed in tomato organs. At least one of the subtilases was found to be expressed in each organ analysed. Structural features evident from deduced amino acid sequences are discussed with reference to the related mammalian proprotein convertases.

Journal

Plant Molecular BiologySpringer Journals

Published: Oct 19, 2004

References

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