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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Dear Phenix developers,<BR>
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I am solving a protein-dna complex and Autobuild is able to build both the protein as well as DNA chain (one at a time). However, when I try to do the refinement, I get an error saying “Phenix could not find the geometry restraints in the standard monomer library for one or more residues in the pdb file... DG: 6 copies, DA: 3 copies, DT: 43 copies”. It seems like Autobuid uses the nomenclature DA, DC, DG and DT for the DNA bases while Phenix.Refine either doesn’t like the nomenclature or the restraint files uses a different one. It still however lets me do the refinement...although I don’t know if it just ignores the DNA part. Can someone enlighten me on this.<BR>
Also, the nomenclature Coot seems to like is Ad, Cd, Gd, Td for the DNA and doesn’t like the above phenix style. In order to manipulate in coot, I had to rename all the bases...is it possible to have a format that is compatible both in Phenix and Coot or am I missing something obvious here.<BR>
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Thanks and Have a great weekend!<BR>
Sena<BR>
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