TY - JOUR A1 - Luo, Hong A1 - Chaudhuri, Asok A1 - Johnson, Kenneth R. A1 - Neote, Kuldeep A1 - Zbrzezna, Valerie A1 - He, Yu A1 - Pogo, A. Oscar T1 - Cloning, Characterization, and Mapping of a Murine Promiscuous Chemokine Receptor Gene: Homolog of the Human Duffy Gene Y1 - 1997/09/01 JF - Genome Research JO - Genome Research SP - 932 EP - 941 DO - 10.1101/gr.7.9.932 VL - 7 IS - 9 UR - http://genome.cshlp.org/content/7/9/932.abstract N2 - We report here the isolation and genomic organization of the orthologous mouse Duffy gene, named Dfy. It is a single copy gene located in chromosome 1 in a region homologous to the human Duffy gene (FY). Sequence analyses indicate that Dfyconsists of two exons: exon 1 of 55 nucleotides, which encodes 7 amino acid residues; and exon 2 of 1038 nucleotides, which encodes 327 residues. The single intron consists of 462 nucleotides. The 5′-end promoter region contains motifs involved in vertebrate development in addition to potential binding sites of factors for globin transcription. The open reading frame (ORF) shows 60% homology with the human Duffy protein. However, mouse erythrocytes are serologically Duffy-negative and mouse erythrocyte membrane proteins do not cross-react with two Duffy-specific rabbit polyclonal antibodies. The deduced protein predicts a M r of 36,692 and carries three potential N-glycosylation sites to asparagine residues. Hydropathy analysis predicts an exocellular amino-terminal domain of 57 residues, seven transmembrane α-helices, and an endocellular carboxy-terminal domain of 29 residues. In bone marrow and spleen,Dfy expresses a major 1.4-kb and a minor 1.8-kb mRNA. Contrary to humans, Dfy is expressed in liver, synthesizing a 1.4-kb mRNA, and is repressed in kidney. Dfy is highly expressed in mouse brain and produces a major 8.5-kb and a minor 10.2-kb mRNA. The human erythroleukemia K562 cells, transfected with cDNA encoding the mouse Duffy-like protein and mouse erythrocytes, have the same chemokine binding profiles indicating that they contain the same protein.[The sequence data described in this paper have been submitted to GenBank under accession nos. AF016584 and AF016697.] ER -