Efflux pump; part of the gene cluster that mediates the biosynthesis of monakolin K, also known as lovastatin, and which acts as a potent competitive inhibitor of HMG-CoA reductase (PubMed:18578535, PubMed:19968298). Expression is controlled by the monacolin K cluster transcription regulator mokH (PubMed:19968298). Monacoline K acts as an inhibitor of HMG-CoA reductase involved in cholesterogenesis (PubMed:21821946). Its hypocholesterolemic activity might be useful for lowering cholesterol levels in the blood and reduce artherosclerosis and coronary heart disease (PubMed:21821946). Belongs to the major facilitator superfamily. TCR/Tet family.