title: Analysis of the interaction between hPFTAIRE1 and PLZF in a yeast two-hybrid system.
abstract: hPFTAIRE1 is a Cdc2-related kinase family member. To search its substrates and regulatory proteins, hPFTAIRE1 was fused to LexA and used as a bait to screen a human brain LexA two-hybrid library. In this screening, seven hPFTAIRE1 interacting proteins, including promyelocytic leukemia zinc finger (PLZF), were obtained. The interaction between PLZF and hPFTAIRE1 was confirmed by beta-galactosidase assay and Leu growth activity. PLZF encodes a transcription factor belonging to the POZ/BTB domain and Krüpel zinc finger (POK) family. The highly conserved POZ/BTB domain plays a critical role in protein-protein interaction. We deleted the POZ/BTB and Krüpel zinc finger domains, respectively, and observed the interaction between hPFTAIRE1 and truncated PLZFs by liquid beta-galactosidase activity assay. A weak interaction was detected between hPFTAIRE1 and PLZF. We also observed the interaction between PLZF and another Cdc2-related kinase, PCTAIRE1. A similar result was observed. The interaction between PLZF and hPFTAIRE1 or PCTAIRE1 was confirmed by co-immunoprecipitation assay in a yeast system. PLZF is a phosphoprotein and plays multiple roles during cell growth. Our results suggest that hPFTAIRE1 and PCTAIRE1 may play important roles in the functional regulation of PLZF.
authors.affiliation: State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.
authors.forename: Yan-Kun
authors.initials: YK
authors.lastname: Gao
authors.forename: Mei
authors.initials: M
authors.lastname: Jiang
authors.forename: Tao
authors.initials: T
authors.lastname: Yang
authors.forename: Jiang-Ye
authors.initials: JY
authors.lastname: Chen
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D001921:Brain / Q000166:cytology / Q000378:metabolism; D042846:CDC2-CDC28 Kinases / Q000378:metabolism*; D002478:Cells, Cultured; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism; D006801:Humans; D047468:Immunoprecipitation / Q000379:methods; D051741:Kruppel-Like Transcription Factors; D010750:Phosphoproteins / Q000235:genetics / Q000378:metabolism; D000075722:Promyelocytic Leukemia Zinc Finger Protein; D012697:Serine Endopeptidases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D020798:Two-Hybrid System Techniques; D015003:Yeasts; D001616:beta-Galactosidase / Q000378:metabolism; D000099160:LexA Repressor Protein
chemical_list: D001426:Bacterial Proteins; D042846:CDC2-CDC28 Kinases; D004268:DNA-Binding Proteins; D018398:Homeodomain Proteins; D051741:Kruppel-Like Transcription Factors; D010750:Phosphoproteins; D000075722:Promyelocytic Leukemia Zinc Finger Protein; D012697:Serine Endopeptidases; D014157:Transcription Factors; D001616:beta-Galactosidase; D000099160:LexA Repressor Protein; C092037:ZBTB16 protein, human