title: NMR mapping of the HIV-1 Tat interaction surface of the KIX domain of the human coactivator CBP.
abstract: Tat is required for the expression of the HIV-1 genome. HIV-1 Tat interacts with the human transcriptional coactivator and acetyltransferase CREB-binding protein (CBP) via the KIX domain of CBP. Chemical shift perturbation mapping with nuclear magnetic resonance spectroscopy was used to identify the surface of human KIX that interacts with Tat. It was found that Tat binds to the c-Jun/MLL/Tax binding surface of KIX, as opposed to the CREB binding site. The results provide new insight into the molecular basis of the assembly of protein complexes involving p300/CBP and Tat during HIV gene expression.
authors.affiliation: Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, Colorado 80523-1870, USA.
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Vendel
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Lumb
mesh_terms: D000123:Acetyltransferases / Q000378:metabolism; D000595:Amino Acid Sequence; D050882:CREB-Binding Protein; D018797:Cell Cycle Proteins / Q000378:metabolism; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism*; D004268:DNA-Binding Proteins / Q000378:metabolism; D015696:Gene Products, tat / Q000378:metabolism*; D015497:HIV-1 / Q000378:metabolism*; D051548:Histone Acetyltransferases; D011495:Histone-Lysine N-Methyltransferase; D006801:Humans; D008969:Molecular Sequence Data; D051788:Myeloid-Lymphoid Leukemia Protein; D019906:Nuclear Magnetic Resonance, Biomolecular; D009687:Nuclear Proteins / Q000378:metabolism*; D010446:Peptide Fragments / Q000378:metabolism; D011485:Protein Binding; D025941:Protein Interaction Mapping / Q000379:methods; D011494:Protein Kinases / Q000378:metabolism; D017434:Protein Structure, Tertiary; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism; D011519:Proto-Oncogenes; D017386:Sequence Homology, Amino Acid; D015534:Trans-Activators / Q000378:metabolism*; D014157:Transcription Factors; D050880:p300-CBP Transcription Factors; D054322:tat Gene Products, Human Immunodeficiency Virus; D000099224:p300-CBP-Associated Factor
chemical_list: D000123:Acetyltransferases; D050882:CREB-Binding Protein; D018797:Cell Cycle Proteins; D017362:Cyclic AMP Response Element-Binding Protein; D004268:DNA-Binding Proteins; D015696:Gene Products, tat; D051548:Histone Acetyltransferases; D011495:Histone-Lysine N-Methyltransferase; D051788:Myeloid-Lymphoid Leukemia Protein; D009687:Nuclear Proteins; D010446:Peptide Fragments; D011494:Protein Kinases; D016755:Proto-Oncogene Proteins c-jun; D015534:Trans-Activators; D014157:Transcription Factors; D050880:p300-CBP Transcription Factors; D054322:tat Gene Products, Human Immunodeficiency Virus; D000099224:p300-CBP-Associated Factor; C497422:KMT2A protein, human; C494363:CREBBP protein, human