Abstract：
:The mouse Fcgr1 gene encoding the high-affinity IgG receptor (FcgammaRI) exists as two known alleles, FcgammaRI-BALB and FcgammaRI-NOD, and these alleles exhibit functional differences. To determine whether other alleles exist in mouse strains, Fcgr1 coding regions from 35 strains of mice were sequenced and a further five alleles were identified. The FcgammaRI-BALB and NOD alleles are now designated the "a" and "d" alleles, respectively. Analysis of the five new alleles revealed that although no polymorphisms were observed in the two leader exons, nucleotide and subsequent amino acid changes were observed in the exons encoding the extracellular domains, and transmembrane and cytoplasmic tail. The cDNA of the seven alleles (a-g) were isolated and transiently transfected into COS cells, and IgG-binding studies were performed. Receptors encoded by four of the five new alleles (b, c, f, g) bound IgG2a with high affinity, displaying IgG binding characteristics similar to the a allele (previously FcgammaRI-BALB). The d allele (previously FcgammaRI-NOD) and the e allele [derived from Mus spretus (SPRET/Ei)] encoded receptors which showed broader specificity by binding monomeric IgG2a, IgG2b, and IgG3.
journal_name
Immunogeneticsjournal_title
Immunogeneticsauthors
Gavin AL,Leiter EH,Hogarth PMdoi
10.1007/s002510050033subject
Has Abstractpub_date
2000-03-01 00:00:00pages
206-11issue
3eissn
0093-7711issn
1432-1211journal_volume
51pub_type
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