期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 385, 期 2, 页码 273-278出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2009.05.055
关键词
Ribosomal protein S3 (rpS3); Arginine methylation; Ribosome assembly
资金
- Korea University [R01-08-000-11574, FPR05C2-390]
The human ribosomal protein S3 (rpS3), a component of the 40S small subunit in the ribosome, is a known multi-functional protein with roles in DNA repair and apoptosis. We recently found that the arginine residue(s) of rpS3 are methylated by protein arginine methyltransferase 1 (PRMT1). In this paper, we confirmed the arginine methylation of rpS3 protein both in vitro and in vivo. The sites of arginine methylation are located at amino acids 64, 65 and 67. However, Mutant rpS3 (3RA), which cannot be methylated at these sites, cannot be transported into the nucleolus and subsequently incorporated into the ribosome. Our results clearly show that arginine methylation of rpS3 plays a critical role in its import into the nucleolus, as well as in small subunit assembly of the ribosome. (C) 2009 Elsevier Inc. All rights reserved.
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