4KTN 4KTN 4ktn Dna gyrase atp binding domain of enterococcus faecalis in complex with a small molecule inhibitor ((3S)-1-[2-(PYRIDO[2,3-B]PYRAZIN-7-YLSULFANYL)-9H-PYRIMIDO[4,5-B]INDOL-4-YL]PYRROLIDIN-3-AMINE) 4KTN-noatom