1.
FEMS Microbiol Lett
; 108(3): 353-9, 1993 Apr 15.
Artículo
en Inglés
| MEDLINE
| ID: mdl-8514122
RESUMEN
By genetic exchange and in vitro mutagenesis a hybrid beta-lactamase was constructed that contained the pCloDF13-encoded bacteriocin release protein signal peptide plus a cysteine residue coupled to the mature portion of beta-lactamase. Immunoblotting, labelling with [3H]palmitate in the presence and absence of globomycin, and pulse-chase experiments revealed that this hybrid construct is modified with lipid and processed into a lipid-modified beta-lactamase. Subcellular localization studies revealed that this hybrid is localized both in the cytoplasmic and outer membranes of Escherichia coli cells. A mutant derivative with an incomplete lipobox (LVG instead of LVAC+1) was not processed and was found in the cytoplasmic membranes.