Abstract:
:Fcα/μR (CD351) is an Fc receptor for both IgA and IgM and forms an atypical dimer that is resistant to reduction by 2-mercaptoethanol or boiling. We previously demonstrated that the cytoplasmic portion of Fcα/μR is required for dimer formation and for its efficient cell-surface expression. However, the biochemical nature of these phenomena has not been determined. By using a BW5147 mouse cell line expressing deletion mutants of the cytoplasmic region of Fcα/μR, we found that the region spanning amino acids 504-523 was required for efficient cell-surface expression, whereas the region spanning amino acids 481-490 was required for dimmer formation. Immunoblotting analyses of transfectants simultaneously expressing Flag-tagged Fcα/μR and hemagglutinin-tagged Fcα/μR suggested that Fcα/μR does not form homodimers. Instead, our data suggest that Fcα/μR forms heterodimers with an as-yet-unknown molecule with a molecular weight of 60-70 kDa.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Takagaki K,Satoh K,Honda S,Shibuya Adoi
10.1016/j.molimm.2013.04.003subject
Has Abstractpub_date
2013-11-01 00:00:00pages
23-7issue
1-2eissn
0161-5890issn
1872-9142pii
S0161-5890(13)00144-2journal_volume
56pub_type
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pub_type: 临床试验,杂志文章
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pub_type: 杂志文章,评审
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更新日期:2003-09-01 00:00:00
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更新日期:2015-10-01 00:00:00