Abstract:
:Histone proteins play a central role in chromatin packaging, and modification of histones is associated with chromatin accessibility. SET domain [Su(var)3-9, Enhancer-of-zeste, Trithorax] proteins are one class of proteins that have been implicated in regulating gene expression through histone methylation. The relationships of 22 SET domain proteins from maize (Zea mays) and 32 SET domain proteins from Arabidopsis were evaluated by phylogenetic analysis and domain organization. Our analysis reveals five classes of SET domain proteins in plants that can be further divided into 19 orthology groups. In some cases, such as the Enhancer of zeste-like and trithorax-like proteins, plants and animals contain homologous proteins with a similar organization of domains outside of the SET domain. However, a majority of plant SET domain proteins do not have an animal homolog with similar domain organization, suggesting that plants have unique mechanisms to establish and maintain chromatin states. Although the domains present in plant and animal SET domain proteins often differ, the domains found in the plant proteins have been generally implicated in protein-protein interactions, indicating that most SET domain proteins operate in complexes. Combined analysis of the maize and Arabidopsis SET domain proteins reveals that duplication of SET domain proteins in plants is extensive and has occurred via multiple mechanisms that preceded the divergence of monocots and dicots.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Springer NM,Napoli CA,Selinger DA,Pandey R,Cone KC,Chandler VL,Kaeppler HF,Kaeppler SMdoi
10.1104/pp.102.013722subject
Has Abstractpub_date
2003-06-01 00:00:00pages
907-25issue
2eissn
0032-0889issn
1532-2548pii
pp.102.013722journal_volume
132pub_type
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