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中国生物工程杂志

China Biotechnology
China Biotechnology  2015, Vol. 35 Issue (4): 1-10    DOI: 10.13523/j.cb.20150401
    
Screening Interacting Proteins for BAG Domains of BAG Family Proteins by GST pull-down Coupled with LC-MS/MS
LIU Dong-mei1, SUN Jia-nan1, ZOU Jia-ning2, LIU Ming-wei3, SUN Lu1, LIU Qiong-ming2
1. College of Pharmacy of Shenyang Pharmaceutical University, Shenyang 110016, China;
2. Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China;
3. Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
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Abstract  

The Bcl-2-associated athanogene (BAG) family proteins are BAG-domain (BD) containing protein and are evolutionally conserved among eukaryotes. BAG family proteins play a critical role in a wide variety of cellular processes, such as cell survival, proliferation, migration, apoptosis, stress response and neural differentiation. BDs are responsible in binding HSP70 to BAG proteins. However, how BDs mediate the protein complexes assembly to govern the diverse functions of BAG proteins is needed further studies. To explore the roles of BDs in BAG family proteins, GST-BDs pull-down coupled with LC-MS/MS were performed to screen the BDs associated proteins in cytosolic extracts from Hela cells. 370 potential BDs interacting proteins were identified. GO (Gene Ontology) annotation analysis shows that BDs interacting proteins function in cellular protein quality control, glycolysis, immune response, stress response, ubiquitin-proteasome regulation, cell cycle process. In particular, KEGG (Kyoto Enyoolpedia of genes and Genomes) pathway enrichment analysis reveals that BDs interacting proteins involve in several important pathways, including FGF signaling pathway, EGF receptor signaling pathway, PDGF signaling pathway and Ras pathway. In addition,different BDs can specifically binding different partners. Overall, this expands knowledge of the BDs interactome, provides a valuable resource for understanding the roles of BDs in mediating BAG proteins' different cellular functions.



Key wordsBAG family proteins      BAG domain (BD)      GST pull-down      LC-MS/MS     
Received: 06 February 2015      Published: 25 April 2015
ZTFLH:  Q71  
Cite this article:

LIU Dong-mei, SUN Jia-nan, ZOU Jia-ning, LIU Ming-wei, SUN Lu, LIU Qiong-ming. Screening Interacting Proteins for BAG Domains of BAG Family Proteins by GST pull-down Coupled with LC-MS/MS. China Biotechnology, 2015, 35(4): 1-10.

URL:

https://manu60.magtech.com.cn/biotech/10.13523/j.cb.20150401     OR     https://manu60.magtech.com.cn/biotech/Y2015/V35/I4/1


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