Abstract:
:We examined folding and secretion of human lysozyme using four mutants each lacking two cysteines expressed in a yeast secretion system. Our results have revealed that the formation of the disulfide bond Cys6/Cys128 in human lysozyme is a prerequisite for correct folding in vivo in yeast. Substitution of Ala for Cys77 and Cys95 gave eight-fold greater secretion of a molecule with almost the same specific activity as that of the native enzyme. Substitutions of the other cysteines gave molecules that were secreted at a lower rate and had lower specific activities than the native enzyme. These are the first findings that the individual disulfide bonds of human lysozyme have different functions in folding and secretion in vivo.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Taniyama Y,Yamamoto Y,Nakao M,Kikuchi M,Ikehara Mdoi
10.1016/s0006-291x(88)80377-2subject
Has Abstractpub_date
1988-05-16 00:00:00pages
962-7issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(88)80377-2journal_volume
152pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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