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Biochem Biophys Res Commun. 2000 Dec 20;279(2):732-7.

p29, a novel GCIP-interacting protein, localizes in the nucleus.

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Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan.


GCIP, a newly identified cyclin D-interacting protein, was found to reduce the phosphorylation of retinoblastoma protein and inhibit E2F1-mediated transcriptional activity. To explore more GCIP interacting proteins, the yeast two-hybrid screening using GCIP as a bait protein was performed. One novel gene, p29, was demonstrated to associate with GCIP in the yeast two-hybrid method and in vitro GST pull-down assay. Multiple tissue Northern blot analysis showed that p29 was abundantly expressed in the heart, skeletal muscle, and kidney relative to other tissues. The transient expression of HA-tagged p29 in HeLa cells localized in the nucleus. Taken together, we have isolated a novel protein, p29, which may be involved in the functional regulation of GCIP.

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