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Plant and Cell Physiology, 2003, Vol. 44, No. 5 549-554
© 2003 Oxford University Press

Short Communications

The CaTin1 (Capsicum annuum TMV-induced Clone 1) and CaTin1-2 Genes are Linked Head-to-Head and Share a Bidirectional Promoter

Ryoung Shin1, Min Jung Kim and Kyung-Hee Paek2

Graduate School of Biotechnology, Korea University, 1,5ga Anam-dong, Sungbuk-gu, Seoul 136-701, Republic of Korea

Abstract

CaTin1 was expressed relatively early in the TMV-inoculated leaves of hot pepper which is resistant to TMV-P0 infection. Interestingly, there was another homologous gene (CaTin1-2) located in front of CaTin1 in a head-to-head fashion and they shared a single promoter. The expression profile of the CaTin1-2 was very similar to CaTin1 in all the treatments except the slower induction time compared to CaTin1 upon TMV-P0 inoculation. The promoter analysis of CaTin1 and CaTin1-2 revealed bidirectionality both in cis-elements and activity. The CaTin1-2 promoter had two TATA-boxes, four GCC-boxes, the root responsive element, and a W1-box. The ethylene-inducible promoter activity depended on GCC-boxes and TMV-inducible activity of the CaTin1-2 promoter reached its highest activity when this promoter had a W1-box.

Footnotes

1 Current address: Donald Danforth Plant Science Center, 975 N Warson Road, St. Louis, MO 63132, U.S.A.

2 Corresponding author: E-mail, khpaek95{at}korea.ac.kr; Fax, +82-2-928-1274.


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