Cloning, expression, characterization and role of the leader sequence of a lipase from Rhizopus oryzae.
A lipase from Rhizopus oryzae DSM 853 (ROL) was cloned from a chromosomal gene bank, sequenced and overexpressed in Escherichia coli. ROL and its precursors ProROL and PreProROL were purified and their pH and temperature profile was determined. In contrast to ROL, ProROL and PreProROL had considerably higher thermostability and a slightly higher pH optimum. Moreover, it could be demonstrated by in vitro experiments that the natural leader sequence of ROL is able to inhibit the folding supporting properties of the prosequence, resulting in a retardation of folding. In addition, there is strong evidence that all different lipase forms derived from Rhizopus sp. described in the literature are a result of different proteolytic processing and originate from the same gene.
AG Werner, MPI-Biochemie, Martinsried, Germany.
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Beer
J E
JE
McCarthy
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Bornscheuer
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Schmid
D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D004795:Enzyme Stability; D004926:Escherichia coli / Q000201:enzymology; D015870:Gene Expression; D005800:Genes, Fungal; D008049:Lipase / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D008969:Molecular Sequence Data; D017510:Protein Folding; D011498:Protein Precursors / Q000096:biosynthesis / Q000235:genetics; D021382:Protein Sorting Signals / Q000737:chemistry / Q000235:genetics*; D012233:Rhizopus / Q000201:enzymology* / Q000235:genetics
D011498:Protein Precursors; D021382:Protein Sorting Signals; D008049:Lipase