Abstract: The present invention is based upon the finding that the protein p300 has acetylation activity which is directed to the retinoblastoma tumour suppressor protein pRb by the presence in the cell of the adenovirus E1A protein. This represents a target for modulators of the cell cycle, to which end the invention provides an assay for a modulator of acetylation of pRb by p300, which comprises: a) bringing into contact a p300 protein a pRb protein and a putative modulator compound under conditions where the p300 protein, in the absence of said modulator is capable of acetylating the pRb protein; b) providing conditions for acetylation of said pRb protein; and c) measuring the degree of inhibition of acetylation caused by said modulator compound.

Abstract: The invention provides a polynucleotide in substantially isolated form which includes a contiguous sequence of nucleotides which is capable of selectively hybridizing to SEQ ID NO: 1 or the complement of SEQ ID NO: 1, and a polypeptide in substantially isolated form which includes: (a) the protein in SEQ ID NO: 2; or (b) an allelic variant or species homologue thereof; or (c) a protein at least 70% homologous to (a); or (d) a fragment of any one of (a) to (c) capable of forming a complex with the E2 F-1 protein or related family member; or (e) a fragment of any one of (a) to (c) of at least 15 amino acids.

Abstract: The present invention is based upon the finding that the protein p300 has acetylation activity which is directed to the retinoblastoma tumour suppressor protein pRb by the presence in the cell of the adenovirus E1A protein. This represents a target for modulators of the cell cycle, to which end the invention provides an assay for a modulator of acetylation of pRb by p300, which comprises: a) bringing into contact a p300 protein a pRb protein and a putative modulator compound under conditions where the p300 protein, in the absence of said modulator is capable of acetylating the pRb protein; b) providing conditions for acetylation of said pRb protein; and c) measuring the degree of inhibition of acetylation caused by said modulator compound.

Abstract: The invention provides an isolated nucleic acid (SEQ ID NO:1) encoding a novel protein, JMY, which is found to be a co-activator of p300/CBP. The invention also provides JMY polypeptides and antibodies thereto, as well as assays for modulators of the cell cycle which target the interaction of JMY with transcription factors such as E2F; ER or TBP.

Abstract: The invention provides an isolated nucleic acid (SEQ ID NO:1) encoding a novel protein, JMY, which is found to be a co-activator of p300/CBP. The invention also provides JMY polypeptides and antibodies thereto, as well as assays for modulators of the cell cycle which target the interaction of JMY with transcription factors such as E2F, ER or TBP.

Abstract: The invention provides an isolated nucleic acid (SEQ ID NO:1) encoding a novel protein, JMY, which is found to be a co-activator of p300/CBP. The invention also provides JMY polypeptides and antibodies thereto, as well as assays for modulators of the cell cycle which target the interaction of JMY with transcription factors such as E2F; ER or TBP.

Abstract: The invention provides a polynucleotide in substantially isolated form which includes a contiguous sequence of nucleotides which is capable of selectively hybridizing to SEQ ID NO: 1 or the complement of SEQ ID NO: 1, and a polypeptide in substantially isolated form which includes: (a) the protein in SEQ ID NO: 2; or (b) an allelic variant or species homologue thereof; or (c) a protein at least 70% homologous to (a); or (d) a fragment of any one of (a) to (c) capable of forming a complex with the E2 F-1 protein or related family member; or (e) a fragment of any one of (a) to (c) of at least 15 amino acids.

Abstract: The invention provides a polynucleotide in substantially isolated form which comprises a contiguous sequence of nucleotides which is capable of selectively hybridizing to Seq. ID No. 1 or to the complement of Seq. ID No. 1, and a polypeptide in substantially isolated form which comprises: (a) the protein of Seq. ID No. 2; or (b) an allelic variant or species homologue thereof; or c) a protein at least 70% homologous to (a); or (d) a fragment of any one of (a) to (c) capable of forming a complex with the E2F-1 protein or related family member; or (e) a fragment of any one of (a) to (c) of at least 15 amino acids.