PMID: 29494751 , Related PDB ids: 2EKO, 4QQG, 2RJF, 2BUD, 2K3Y, 2F5K, 3OA6, 1KNE, 4A4E, 3QJ6, 2RO0

Authors:

Zhang Y, Lei M, Yang X, Feng Y, Yang Y, Loppnau P, Li Y, Yang Y, Min J, Liu Y

Title:

Structural and histone binding studies of the chromo barrel domain of TIP60.

Journal:

FEBS Lett. 2018 Apr;592(7):1221-1232. doi: 10.1002/1873-3468.13021. Epub 2018 Mar, 25.

Abstract:

Tat-interactive protein 60 consists of an N-terminal chromo barrel domain (TIP60-CB) and a C-terminal acetyltransferase domain and acetylates histone and nonhistone proteins in diverse cellular processes. While TIP60-CB is thought to recognize histone tails, molecular details of this interaction remain unclear. Here, we attempted a quantitative analysis of the interaction between the human TIP60-CB and histone peptides, but did not observe any detectable binding by either fluorescence polarization or isothermal titration calorimetry assays. We also determined the crystal structure of the TIP60-CB alone. Analysis of the apo-structure reveals a putative peptide-binding site that might be occluded by the basic side chain of a residue in a unique beta hairpin between the two N-terminal strands of the beta barrel, leading to the inability of TIP60-CB to bind histones.