title: The PcG protein hPc2 interacts with the N-terminus of histone demethylase JARID1B and acts as a transcriptional co-repressor.
abstract: JARID1B (jumonji AT rich interactive domain 1B) is a large nuclear protein that is highly expressed in breast cancers and is proposed to function as a repressor of gene expression. In this paper, a phage display screen using the N-terminus of JARID1B as bait identified one of the JARID1B interacting proteins, namely PcG protein (Polycomb group) hPc2. We demonstrated that the C-terminal region, including the COOH box, was required for the interaction with the N-terminus of JARID1B. In a reporter assay system, co-expression of JARID1B with hPc2 significantly enhanced the transcriptional repression. These results support a role for hPc2 acting as a transcriptional co-repressor.
authors.affiliation: Institute of Immunology, Zhejiang University, Hangzhou 210058, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Zhou
authors.forename: Haixiang
authors.initials: H
authors.lastname: Chen
authors.forename: Lihuang
authors.initials: L
authors.lastname: Zhang