Resistance to antibiotics containing the purpurosamine ring including gentamicin, kanamycin, tobramycin, and neomycin. MSIQHFQRKLGITKYSIVTNSNDSVTLRLMTEHDLAMLYEWLNRSHIVEWWGGEEARPTLADVQEQYLPSVLAQESVTPYIAMLNGEPIGYAQSYVALGSGDGWWEEETDPGVRGIDQLLANASQLGKGLGTKLVRALVELLFNDPEVTKIQTDPSPSNLRAIRCYEKAGFERQGTVTTPDGPAVYMVQTRQAFERTRRFA Aminoglycoside N(6')-acetyltransferase AAC(6') aacA4 201 AAC6_SERMA