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Figure 16
Unmodelled PTMs in the PDB. Density for protein modifications may be present but left unmodelled. (a) Lys84 has positive difference density surrounding the side-chain amino group (PDB entry 2jc7; Santillana et al., 2007BB127). (b) Addition of a carboxyl group to the NZ atom of Lys84 [using Coot (Emsley et al., 2010BB56) and AceDRG (Long et al., 2017BB98)], followed by refinement with REFMAC (Murshudov et al., 2011BB108). 2mFoDFc electron density is shown in blue at 1σ for the residue. Positive difference density (mFoDFc) is shown in green contoured to 4σ and clipped within 4 Å of Lys84. The rest of the protein chain is represented by a yellow ribbon model.

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BIOLOGY
ISSN: 2059-7983
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