NCIt definition : An antineoplastic antibiotic that is structurally similar to the benzoquinone ansamycin
antibiotic geldanamycin. A geldanamycin analogue binds to HSP90, a chaperone protein
that aids in the assembly, maturation, and folding of proteins. Subsequently, the
function of HSP90 is inhibited, leading to the degradation and depletion of client
proteins such as kinases and transcription factors involved with cell cycle regulation
and signal transduction.;
Alternative definition : NCI-GLOSS: An antineoplastic antibiotic drug that belongs to the family of drugs called
ansamycins.;