期刊
JOURNAL OF COMPUTATIONAL BIOLOGY
卷 22, 期 9, 页码 876-886出版社
MARY ANN LIEBERT, INC
DOI: 10.1089/cmb.2015.0103
关键词
mTOR; protein domain; protein-protein interactions; Raptor; Rictor
类别
资金
- National Cancer Institute, National Institutes of Health [HHSN261200800001E]
- NIH, National Cancer Institute, Center for Cancer Research
- Chinese NFSC [30772529]
- 973 program [2011CB933100, 2010CB933900]
Mammalian target of rapamycin (mTOR) complexes play a pivotal role in the cell. Raptor and Rictor proteins interact with mTOR to form two distinct complexes, mTORC1 and mTORC2, respectively. While the domain structure of Raptor is known, current bioinformatics tools failed to classify the domains in Rictor. Here we focus on identifying specific domains in Rictor by searching for conserved regions. We scanned the pdb structural database and constructed three protein domain datasets. Next we carried out multiple pairwise sequence alignments of the proteins in the domain dataset. By analyzing the z-scores of Rictor sequence similarity to protein sequences in the dataset, we assigned the structural and functional domains of Rictor. We found that, like Raptor, Rictor also has HEAT and WD40 domains, which could be the common motif binding to mTORC. Rictor may also have pleckstrin homology domains, which mediate cellular localization and transmit signals to downstream targets, as well as a domain that is homologous to 50S protein L17 and human 39S protein L17. This putative ribosome binding domain could mediate mTORC2-ribosome interaction.
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