Adenovirus mediated expression "in vivo" of the chemokine receptor CXCR1.

Adenovirus mediated expression "in vivo" of the chemokine receptor CXCR1.
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腺病毒介导趋化因子受体CXCR1的“体内”表达。

DOI:
10.1007/s10969-008-9051-x
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发表时间:
2009
期刊:
Journal of structural and functional genomics
影响因子:
--
通讯作者:
Navarro,J
Navarro,J
中科院分区:
--
文献类型:
--
作者:
Sarmiento,J;Kypreos,KE;Prado,GN;Suetomi,K;Stanzel,C;Maxwell,C;Shumate,D;Tandang-Silvas,MR;Rajarathnam,K;Navarro,J

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A major hurdle in the structural analysis of membrane proteins is the expression of a functional and homogeneous form of the protein. Except for rhodopsin, most G protein-coupled receptors (GPCRs) are endogenously expressed at very low levels. Heterologous expression of GPCRs in bacteria, yeast, insect cells or mammalian cell lines often yields proteins with large amounts of misfolded proteins and heterogeneous posttranslational modifications. Here, we report a novel mammalian “in vivo” system for the expression of the chemokine receptor CXCR1. This receptor was expressed in liver of mice infected with adenovirus encoding CXCR1. Liver plasma membranes from infected mice displayed high-levels of125I-labeled human interleukin-8 (IL-8) binding. The pharmacological profile of the recombinant CXCR1 expressed “in vivo” was similar to those expressed in neutrophils. We found that the incorporation of the detergent solubilized CXCR1 into phospholipid vesicles in the presence of Gi/Go proteins is required for the reconstitution of125I-IL-8 binding. On the basis of the presence of the several endogenous His residues and glycosylation moieties in CXCR1 we fractionated the detergent-solubilized plasma membranes by employing Ni- and Concanavalin A-based chromatography. Fractions enriched with CXCR1 were monitored by125I-IL-8-bound to the receptor and Western blots with anti-CXCR1 antibodies. This robust expression system could be readily applied for the expression of GPCRs and other eukaryotic membrane proteins.
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