Abstract:
:The major histocompatibility complex (MHC) class I related receptor, the neonatal Fc receptor (FcRn), rescues immunoglobulin G (IgG) and albumin from lysosomal degradation by recycling in endothelial cells. FcRn also contributes to passive immunity by mediating transport of IgG from mother to fetus (human) or newborn (rodents), and may translocate IgG over mucosal surfaces. FcRn interacts with the Fc-region of IgG and domain III of albumin with binding at pH 6.0 and release at pH 7.4. Knowledge of these interactions has facilitated design of recombinant proteins with altered serum half-lives and/or altered biodistribution. To generate further research in this field, there is a great need for large amounts of soluble human FcRn (shFcRn) for in vitro interaction studies. In this report, we describe a novel laboratory scale production of functional shFcRn in Escherichia coli (E. coli) at milligram level. Truncated wild type hFcRn heavy chains were expressed, extracted, purified from inclusion bodies under denaturing non-reducing conditions, and subsequently refolded in the presence of human beta(2)-microglobulin (hbeta(2)m). The secondary structural elements of refolded heterodimeric shFcRn were correctly formed as demonstrated by circular dichroism (CD). Furthermore, functional and stringent pH dependent binding to IgG and human serum albumin were demonstrated by ELISA and surface plasmon resonance (SPR). This method may be easily adapted for the expression of large amounts of other FcRn species and MHC class I related molecules.
journal_name
J Immunol Methodsjournal_title
Journal of immunological methodsauthors
Andersen JT,Justesen S,Berntzen G,Michaelsen TE,Lauvrak V,Fleckenstein B,Buus S,Sandlie Idoi
10.1016/j.jim.2007.11.003subject
Has Abstractpub_date
2008-02-29 00:00:00pages
39-49issue
1-2eissn
0022-1759issn
1872-7905pii
S0022-1759(07)00356-0journal_volume
331pub_type
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journal_title:Journal of immunological methods
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journal_title:Journal of immunological methods
pub_type: 杂志文章,评审
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journal_title:Journal of immunological methods
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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journal_title:Journal of immunological methods
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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journal_title:Journal of immunological methods
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pub_type: 杂志文章
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journal_title:Journal of immunological methods
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journal_title:Journal of immunological methods
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journal_title:Journal of immunological methods
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更新日期:1986-06-10 00:00:00
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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