Protein Structure available on Protein Data Bank by the PDB code: 1KSY.
Enemark EJ, Stenlund A, Joshua-Tor L. Crystal structures of two intermediates in the assembly of the papillomavirus replication initiation complex. EMBO J. 2002 Mar 15;21(6):1487-96.
Printed with natural PLA, 0,14 layer high and a lot of support!
If you start from the pdb files, in which I've already separated DNA and protein, you'll have to open them on Chimera freeware (www.cgl.ucsf.edu/chimera), turn it into surface, improve resolution and save a .stl file (shown in the pictures).
For more information just take a look at http://www.researchgate.net/post/Protocol_on_how_to_3D_print_protein_structures2
There's where I got my instructions mainly.