Figure 3. Molecular model of the second bromodomain of TAF1.
(A) The S1600 side chain makes H-bond contacts with N1604 on the next turn of αB and with T1611 on the adjacent helix αC. The S1600, N1604, and T1611 are conserved. (B) Replacement of the serine with glycine is predicted to disrupt hydrogen bonding with N1601 and T1611.