Abstract:
:Most members of the large family of rhodopsin-like G-protein-coupled receptors possess an evolutionarily conserved Asp-Arg-Tyr (DRY) motif in the C-terminal region of the third transmembrane domain. Mutations of residues within this motif usually abolish receptor function and, when they occur naturally, can even cause human diseases. By analyzing over 100 mammalian orthologs of the chemoattractant receptor GPR33 we identified several polymorphic and fixed sequence variations within the DRY motif. Unexpectedly, the naturally occurring mutation of Arg(3.50) to His in mouse GPR33 showed no difference from the wild-type receptor in several functional tests. Sequence analysis of GPR33 from Asian house mice revealed the polymorphic existence of Arg(3.50) and His(3.50) alleles in wild-trapped populations, further supporting the functional equivalence of both allelic variants. In contrast, the Arg(3.50) to Gly mutation found in hamster GPR33 inactivates the receptor and may have contributed to pseudogenization of this gene in this species. Functional data with GPR33 variants indicate different receptor- and context-specific consequences of DRY mutations. Our study also reveals GPR33 as a new example illustrating missense mutations as a first step in the pseudogenization process.
journal_name
Genomicsjournal_title
Genomicsauthors
Römpler H,Yu HT,Arnold A,Orth A,Schöneberg Tdoi
10.1016/j.ygeno.2006.02.009subject
Has Abstractpub_date
2006-06-01 00:00:00pages
724-32issue
6eissn
0888-7543issn
1089-8646pii
S0888-7543(06)00051-6journal_volume
87pub_type
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