A strategically located serine residue is critical for the mutator activity of DNA polymerase IV from Escherichia coli.
Sharma, A., Kottur, J., Narayanan, N., Nair, D.T.(2013) Nucleic Acids Res 41: 5104-5114
- PubMed: 23525461 
- DOI: 10.1093/nar/gkt146
- Primary Citation of Related Structures:  
4IR1, 4IR9, 4IRC, 4IRD, 4IRK - PubMed Abstract: 
The Y-family DNA polymerase IV or PolIV (Escherichia coli) is the founding member of the DinB family and is known to play an important role in stress-induced mutagenesis. We have determined four crystal structures of this enzyme in its pre-catalytic state in complex with substrate DNA presenting the four possible template nucleotides that are paired with the corresponding incoming nucleotide triphosphates ...