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Intramembrane-cleaving proteases are members of a novel type of enzyme that hydrolyse substrate proteins within transmembrane regions. The presently known proteases that catalyse such cleavage reactions are membrane proteins of high hydrophobicity and multiple predicted transmembrane regions. A key feature is the positioning of active site residues in hydrophobic segments implying that the catalytic...
The ftsH gene encodes an ATP- and Zn 2+ -dependent metalloprotease with a molecular mass of about 70 kDa. It was first identified in Escherichia coli where it is also designated hflB, tolZ or mrsC, and seems to be present in most if not all bacteria. The FtsH protein is anchored to the cytoplasmic membrane via two transmembrane regions in such a way that the very short amino- and the...
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