title: Ermap, a gene coding for a novel erythroid specific adhesion/receptor membrane protein.
abstract: Ermap (erythroid membrane-associated protein), a gene coding for a novel transmembrane protein produced exclusively in erythroid cells, is described. It is mapped to murine Chromosome 4, 57 cM distal to the centromere. The initial cDNA clone was isolated from a day 9 murine embryonic erythroid cell cDNA library. The predicted peptide sequence suggests that ERMAP is a transmembrane protein with two extracellular immunoglobulin folds, as well as a highly conserved B30.2 domain and several phosphorylation consensus sequences in the cytoplasmic region. ERMAP shares a high homology throughout the entire peptide with butyrophilin, a glycoprotein essential for milk lipid droplet formation and release. A GFP-ERMAP fusion protein was localized to the plasma membrane and cytoplasmic vesicles in transiently transfected 293T cells. Northern blot analysis and in-situ hybridization demonstrated that Ermap expression was restricted to fetal and adult erythroid tissues. ERMAP is likely a novel adhesion/receptor molecule specific for erythroid cells.
authors.affiliation: Department of Pathology and Molecular Medicine, McMaster University Faculty of Health Sciences, Hamilton, Ontario, Canada.
authors.forename: T Z
authors.initials: TZ
authors.lastname: Ye
authors.forename: C T
authors.initials: CT
authors.lastname: Gordon
authors.forename: Y H
authors.initials: YH
authors.lastname: Lai
authors.forename: Y
authors.initials: Y
authors.lastname: Fujiwara
authors.forename: L L
authors.initials: LL
authors.lastname: Peters
authors.forename: A C
authors.initials: AC
authors.lastname: Perkins
authors.forename: D H
authors.initials: DH
authors.lastname: Chui
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001789:Blood Group Antigens; D015152:Blotting, Northern; D000071797:Butyrophilins; D002448:Cell Adhesion; D015815:Cell Adhesion Molecules / Q000235:genetics*; D002460:Cell Line; D002467:Cell Nucleus / Q000737:chemistry; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D003593:Cytoplasm / Q000737:chemistry; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D004622:Embryo, Mammalian / Q000378:metabolism; D004912:Erythrocytes / Q000166:cytology / Q000378:metabolism*; D005786:Gene Expression Regulation; D018507:Gene Expression Regulation, Developmental; D049452:Green Fluorescent Proteins; D006801:Humans; D017403:In Situ Hybridization; D020014:K562 Cells; D008164:Luminescent Proteins / Q000235:genetics / Q000378:metabolism; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D051379:Mice; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D009115:Muridae; D012313:RNA / Q000235:genetics / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014018:Tissue Distribution
chemical_list: D001789:Blood Group Antigens; D000071797:Butyrophilins; D015815:Cell Adhesion Molecules; D018076:DNA, Complementary; C485781:Ermap protein, mouse; D008164:Luminescent Proteins; D008565:Membrane Proteins; D011993:Recombinant Fusion Proteins; C472715:scianna antigens; D049452:Green Fluorescent Proteins; D012313:RNA