I have a dataset of pdb-format protein structure decoys/models generated by tertiary structure prediction programs. Many of these are missing hydrogen atoms.
Specifically, I'd like to determine the rough location of side-chain hydrogens in glycine residues, given the CA, C, N, and O coordinates. Is this possible? I don't need too much precision - I just need the general direction relative to the rest of the residue. More specifically, I want a vector originating at the CA that points roughly in the direction of the side chain.
I've looked at software for generating hydrogen atoms from pdb structures, however, I need to know which ones are glycine side chains, and was wondering if there might be a simpler way to predict hydrogen locations given coordinates of backbone atoms.