RGD Reference Report - Tob2, a novel anti-proliferative Tob/BTG1 family member, associates with a component of the CCR4 transcriptional regulatory complex capable of binding cyclin-dependent kinases. - Rat Genome Database

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Tob2, a novel anti-proliferative Tob/BTG1 family member, associates with a component of the CCR4 transcriptional regulatory complex capable of binding cyclin-dependent kinases.

Authors: Ikematsu, N  Yoshida, Y  Kawamura-Tsuzuku, J  Ohsugi, M  Onda, M  Hirai, M  Fujimoto, J  Yamamoto, T 
Citation: Ikematsu N, etal., Oncogene 1999 Dec 9;18(52):7432-41.
RGD ID: 1549881
Pubmed: PMID:10602502   (View Abstract at PubMed)
DOI: DOI:10.1038/sj.onc.1203193   (Journal Full-text)

Human cDNAs encoding a novel member of Tob/BTG1 anti-proliferative family proteins were cloned. The putative protein product termed Tob2 consisted of 344 amino acids with high similarity to the Tob protein. The tob2 mRNA was 4.1 kb long and was ubiquitously expressed in human adult tissues, as was revealed by Northern blot hybridization. However, further in situ hybridization analysis showed a characteristic expression of the tob2 mRNA in oocytes, suggesting a unique role of Tob2 in oogenesis. Like the Tob protein, Tob2 inhibited cell cycle progression from the G0/G1 to S phases. Intriguingly, the amino-terminal half of Tob2 as well as that of Tob was associated with a human homologue of yeast Caf1, a component of the CCR4 transcription factor complex. Moreover, Caf1 was associated with cyclin dependent kinases. These data suggested that both Tob and Tob2 were involved in cell cycle regulation through their interaction with Caf1. Finally, the tob2 gene was mapped to human chromosome 22q13.1-q13.31.

Objects referenced in this article
Gene Tob2 transducer of ERBB2, 2 Rattus norvegicus

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