BROWSE

Related Scientist

Researcher

이신영
식물 노화·수명 연구단
more info

Trithorax group protein Oryza sativa trithorax1 controls flowering time in rice via interaction with early heading date3

Cited 35 time in webofscience Cited 0 time in scopus
340 Viewed 34 Downloaded
Title
Trithorax group protein Oryza sativa trithorax1 controls flowering time in rice via interaction with early heading date3
Author(s)
Choi, S.C.; Shinyoung Lee; Kim, S.R.; Lee, Y.S.; Liu, C.; Cao, X.; An, G.
Publication Date
2014-03
Journal
PLANT PHYSIOLOGY, v.164, no.3, pp.1326 - 1337
Publisher
AMER SOC PLANT BIOLOGISTS
Abstract
Trithorax group proteins are chromatin-remodeling factors that activate target gene expression by antagonistically functioning against the Polycomb group. In Arabidopsis (Arabidopsis thaliana), Arabidopsis Trithorax protein1 (ATX1) regulates flowering time and floral organ identity. Here, we observed that suppression of Oryza sativa Trithorax1 (OsTrx1), an ortholog of ATX1, delayed flowering time in rice (Oryza sativa). Because the delay occurred only under long-day conditions, we evaluated the flowering signal pathways that specifically function under long-day conditions. Among them, the OsMADS50 and Heading date1 pathways were not affected by the mutation. However, the Grain number, plant height, and heading date7 (Ghd7) pathway was altered in ostrx1. Transcript levels of OsGI, phytochrome genes, and Early heading date3 (Ehd3), which function upstream of Ghd7, were unchanged in the mutant. Because Trx group proteins form a complex with other proteins to modify the chromatin structure of target genes, we investigated whether OsTrx1 interacts with a previously identified protein that functions upstream of Ghd7. We demonstrated that the plant homeodomain motif of OsTrx1 binds to native histone H3 from the calf thymus and that OsTrx1 binds to Ehd3 through the region between the plant homeodomain and SET domains. Finally, we showed that the SET domain at the C-terminal end of OsTrx1 has histone H3 methyltransferase activity when incubated with oligonucleosomes. Our results suggest that OsTrx1 plays an important role in regulating flowering time in rice by modulating chromatin structure.
URI
https://pr.ibs.re.kr/handle/8788114/1525
ISSN
0032-0889
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > Journal Papers (저널논문)
Files in This Item:
Plant Physiology_2014.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse