Isolation and expression of the full-length cDNA encoding CD59 antigen of human lymphocytes.
To identify the primary structure of CD59 antigen and to elucidate its function, a full-length cDNA clone of CD59 was isolated. The cDNA sequence contained an open reading frame that encodes an 128-amino-acid peptide. The amino-terminal 25 amino acids represented a typical signal peptide sequence and the carboxy-terminal hydrophobic amino acids were characteristic for phosphatidylinositol-anchored proteins. The predicted mature protein sequence showed 35% homology with murine Ly-6C.1 and 31% with Ly-6A.2. The number and the distribution of cysteine residues were conserved, implying that the CD59 represented a human homologue of murine Ly-6. RNA blot hybridization analysis revealed the expression of CD59 mRNA in placental, lung, and pancreatic tissues. The mRNA was not only expressed in T-cell lines but in some of monocytic, myeloid, and B-cell lines. In all of these tissues and cell lines, at least four mRNA species were detected. DNA blot hybridization analysis revealed a rather simple genomic structure, which suggested a single gene as compared with the complex multigene family of murine Ly-6.
Basic Research Laboratories, Toray Industries, Inc. Kamakura, Japan.
R
R
Sawada
K
K
Ohashi
H
H
Anaguchi
H
H
Okazaki
M
M
Hattori
N
N
Minato
M
M
Naruto
D000595:Amino Acid Sequence; D000818:Animals; D015703:Antigens, CD / Q000096:biosynthesis / Q000235:genetics*; D000943:Antigens, Differentiation / Q000096:biosynthesis / Q000235:genetics*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000235:genetics; D000950:Antigens, Ly / Q000235:genetics; D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D018957:CD59 Antigens; D002478:Cells, Cultured; D003001:Cloning, Molecular; D015723:Gene Library; D006801:Humans; D008562:Membrane Glycoproteins / Q000096:biosynthesis / Q000235:genetics*; D051379:Mice; D008969:Molecular Sequence Data; D009000:Monocytes; D016133:Polymerase Chain Reaction; D011994:Recombinant Proteins / Q000096:biosynthesis; D012689:Sequence Homology, Nucleic Acid; D014162:Transfection; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7
D015703:Antigens, CD; D000943:Antigens, Differentiation; D000945:Antigens, Differentiation, T-Lymphocyte; D000950:Antigens, Ly; D018957:CD59 Antigens; D008562:Membrane Glycoproteins; D011994:Recombinant Proteins; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7