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Comparative and Functional Genomics
Volume 2012 (2012), Article ID 310402, 8 pages
Research Article

Comparative Analysis of SWIRM Domain-Containing Proteins in Plants

1Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Guangzhou 51065, China
2Graduate University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
3Agriculture and Agri-Food Canada, Southern Crop Protection and Food Research Centre, London, ON, Canada N5V 4T3
4Institute of Plant Biology, National Taiwan University, Taipei 106, Taiwan

Received 12 April 2012; Revised 16 June 2012; Accepted 24 June 2012

Academic Editor: Elena Pasyukova

Copyright © 2012 Yan Gao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Chromatin-remodeling complexes affect gene expression by using the energy of ATP hydrolysis to locally disrupt or alter the association of histones with DNA. SWIRM (Swi3p, Rsc8p, and Moira) domain is an alpha-helical domain of about 85 residues in chromosomal proteins. SWIRM domain-containing proteins make up large multisubunit complexes by interacting with other chromatin modification factors and may have an important function in plants. However, little is known about SWIRM domain-containing proteins in plants. In this study, 67 SWIRM domain-containing proteins from 6 plant species were identified and analyzed. Plant SWIRM domain proteins can be divided into three distinct types: Swi-type, LSD1-type, and Ada2-type. Generally, the SWIRM domain forms a helix-turn-helix motif commonly found in DNA-binding proteins. The genes encoding SWIRM domain proteins in Oryza sativa are widely expressed, especially in pistils. In addition, OsCHB701 and OsHDMA701 were downregulated by cold stress, whereas OsHDMA701 and OsHDMA702 were significantly induced by heat stress. These observations indicate that SWIRM domain proteins may play an essential role in plant development and plant responses to environmental stress.