A yeast metal resistance protein similar to human cystic fibrosis transmembrane conductance regulator (CFTR) and multidrug resistance-associated protein

Production and characterisation of monoclonal and polyclonal antibodies to different regions of the cystic fibrosis transmembrane conductance regulator (CFTR): detection of immunologically related proteins

We have raised mouse monoclonal antibodies to eight synthetic peptides corresponding to different regions of the human cystic fibrosis transmembrane conductance regulator (CFTR) and rabbit polyclonal antisera to beta-galactosidase fusion proteins which encompass three different regions of CFTR. Immunoblot, immunoprecipitation, immunofluorescence and immunocytochemical experiments demonstrate that, in addition to recognising CFTR, these antibodies recognise one or more immunologically related proteins with a similar molecular mass, calcium responsiveness and tissue distribution to CFTR.

Yeast multidrug resistance: the PDR network

This minireview describes a network of genes involved in multiple drug resistance of the yeast S. cerevisiae. The transcription regulators, PDR1, PDR3, PDR7, and PDR9 control the expression of the gene PDR5, encoding a membrane protein of the ATP-binding-cassette superfamily and functioning as a drug extrusion pump. Next to PDR5, several other target genes, encoding membrane pumps of the ABC type, such as SNQ2, STE6, PDR10, PDR11, YOR1, but also other membrane-associated (such as GAS1, D4405) or soluble proteins (such as G3PD), involved or not in multidrug resistance, are found to be controlled by PDR1. On another side, the PDR3 regulator participates with its homolog PDR1 to co- and auto-regulation circuits of yeast multidrug resistance.