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. 1991 Jan;87(1):68–76. doi: 10.1172/JCI115003

Molecular definition and sequence motifs of the 52-kD component of human SS-A/Ro autoantigen.

E K Chan 1, J C Hamel 1, J P Buyon 1, E M Tan 1
PMCID: PMC294993  PMID: 1985112

Abstract

Serum SS-A/Ro autoantibodies are commonly found in patients with Sjogren's syndrome, systemic lupus erythematosus, neonatal lupus, and subacute cutaneous lupus. Two proteins of 60 and 52 kD have been described as targets for these autoantibodies. To define the 52-kD component unambiguously, cDNA clones were isolated from human HepG2 and MOLT-4 cell cDNA libraries. The identity of cDNA was established by (a) the specificity of the antibody affinity purified from the recombinant protein, (b) the reactivity of the purified recombinant protein with prototype SS-A/Ro sera in immunoblot and ELISA, and (c) two-dimensional gel comigration of MOLT-4 cell 52-kD protein and the recombinant protein. A 1.9-kb cDNA encoded the complete 52-kD protein containing 475 amino acids (Mr 54,082). Putative zinc-finger domains and a leucine zipper motif were identified in the amino-terminal half of the 52-kD protein, implicating its possible association with DNA/RNA. Sequence homology detected between the 52-kD protein and human ret transforming protein, and mouse T cell gene expression down-regulatory protein rpt-1, may provide leads to the functional role of the 52-kD protein in addition to the possibility that these proteins might constitute members of a subfamily of finger proteins.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Adam S. A., Nakagawa T., Swanson M. S., Woodruff T. K., Dreyfuss G. mRNA polyadenylate-binding protein: gene isolation and sequencing and identification of a ribonucleoprotein consensus sequence. Mol Cell Biol. 1986 Aug;6(8):2932–2943. doi: 10.1128/mcb.6.8.2932. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Ben-Chetrit E., Chan E. K., Sullivan K. F., Tan E. M. A 52-kD protein is a novel component of the SS-A/Ro antigenic particle. J Exp Med. 1988 May 1;167(5):1560–1571. doi: 10.1084/jem.167.5.1560. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Ben-Chetrit E., Fox R. I., Tan E. M. Dissociation of immune responses to the SS-A (Ro) 52-kd and 60-kd polypeptides in systemic lupus erythematosus and Sjögren's syndrome. Arthritis Rheum. 1990 Mar;33(3):349–355. doi: 10.1002/art.1780330307. [DOI] [PubMed] [Google Scholar]
  4. Ben-Chetrit E., Gandy B. J., Tan E. M., Sullivan K. F. Isolation and characterization of a cDNA clone encoding the 60-kD component of the human SS-A/Ro ribonucleoprotein autoantigen. J Clin Invest. 1989 Apr;83(4):1284–1292. doi: 10.1172/JCI114013. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Berg J. M. Potential metal-binding domains in nucleic acid binding proteins. Science. 1986 Apr 25;232(4749):485–487. doi: 10.1126/science.2421409. [DOI] [PubMed] [Google Scholar]
  6. Boire G., Craft J. Biochemical and immunological heterogeneity of the Ro ribonucleoprotein particles. Analysis with sera specific for the RohY5 particle. J Clin Invest. 1989 Jul;84(1):270–279. doi: 10.1172/JCI114150. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Buyon J. P., Ben-Chetrit E., Karp S., Roubey R. A., Pompeo L., Reeves W. H., Tan E. M., Winchester R. Acquired congenital heart block. Pattern of maternal antibody response to biochemically defined antigens of the SSA/Ro-SSB/La system in neonatal lupus. J Clin Invest. 1989 Aug;84(2):627–634. doi: 10.1172/JCI114208. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Buyon J. P., Slade S. G., Chan E. K., Tan E. M., Winchester R. Effective separation of the 52 kDa SSA/Ro polypeptide from the 48 kDa SSB/La polypeptide by altering conditions of polyacrylamide gel electrophoresis. J Immunol Methods. 1990 May 25;129(2):207–210. doi: 10.1016/0022-1759(90)90440-7. [DOI] [PubMed] [Google Scholar]
  9. Buyon J. P., Winchester R. Congenital complete heart block. A human model of passively acquired autoimmune injury. Arthritis Rheum. 1990 May;33(5):609–614. doi: 10.1002/art.1780330502. [DOI] [PubMed] [Google Scholar]
  10. Chan E. K., Francoeur A. M., Tan E. M. Epitopes, structural domains, and asymmetry of amino acid residues in SS-B/La nuclear protein. J Immunol. 1986 May 15;136(10):3744–3749. [PubMed] [Google Scholar]
  11. Chan E. K., Sullivan K. F., Tan E. M. Ribonucleoprotein SS-B/La belongs to a protein family with consensus sequences for RNA-binding. Nucleic Acids Res. 1989 Mar 25;17(6):2233–2244. doi: 10.1093/nar/17.6.2233. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Chanet R., Magana-Schwencke N., Fabre F. Potential DNA-binding domains in the RAD18 gene product of Saccharomyces cerevisiae. Gene. 1988 Dec 30;74(2):543–547. doi: 10.1016/0378-1119(88)90187-4. [DOI] [PubMed] [Google Scholar]
  13. Chen E. Y., Seeburg P. H. Supercoil sequencing: a fast and simple method for sequencing plasmid DNA. DNA. 1985 Apr;4(2):165–170. doi: 10.1089/dna.1985.4.165. [DOI] [PubMed] [Google Scholar]
  14. Deutscher S. L., Harley J. B., Keene J. D. Molecular analysis of the 60-kDa human Ro ribonucleoprotein. Proc Natl Acad Sci U S A. 1988 Dec;85(24):9479–9483. doi: 10.1073/pnas.85.24.9479. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Devereux J., Haeberli P., Smithies O. A comprehensive set of sequence analysis programs for the VAX. Nucleic Acids Res. 1984 Jan 11;12(1 Pt 1):387–395. doi: 10.1093/nar/12.1part1.387. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Feinberg A. P., Vogelstein B. A technique for radiolabeling DNA restriction endonuclease fragments to high specific activity. Anal Biochem. 1983 Jul 1;132(1):6–13. doi: 10.1016/0003-2697(83)90418-9. [DOI] [PubMed] [Google Scholar]
  17. Garrels J. I. Quantitative two-dimensional gel electrophoresis of proteins. Methods Enzymol. 1983;100:411–423. doi: 10.1016/0076-6879(83)00070-1. [DOI] [PubMed] [Google Scholar]
  18. Higgins D. G., Sharp P. M. CLUSTAL: a package for performing multiple sequence alignment on a microcomputer. Gene. 1988 Dec 15;73(1):237–244. doi: 10.1016/0378-1119(88)90330-7. [DOI] [PubMed] [Google Scholar]
  19. Higgins D. G., Sharp P. M. Fast and sensitive multiple sequence alignments on a microcomputer. Comput Appl Biosci. 1989 Apr;5(2):151–153. doi: 10.1093/bioinformatics/5.2.151. [DOI] [PubMed] [Google Scholar]
  20. Klug A., Rhodes D. Zinc fingers: a novel protein fold for nucleic acid recognition. Cold Spring Harb Symp Quant Biol. 1987;52:473–482. doi: 10.1101/sqb.1987.052.01.054. [DOI] [PubMed] [Google Scholar]
  21. Kouzarides T., Ziff E. The role of the leucine zipper in the fos-jun interaction. Nature. 1988 Dec 15;336(6200):646–651. doi: 10.1038/336646a0. [DOI] [PubMed] [Google Scholar]
  22. Kozak M. The scanning model for translation: an update. J Cell Biol. 1989 Feb;108(2):229–241. doi: 10.1083/jcb.108.2.229. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Laemmli U. K. Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature. 1970 Aug 15;227(5259):680–685. doi: 10.1038/227680a0. [DOI] [PubMed] [Google Scholar]
  24. Landschulz W. H., Johnson P. F., McKnight S. L. The DNA binding domain of the rat liver nuclear protein C/EBP is bipartite. Science. 1989 Mar 31;243(4899):1681–1688. doi: 10.1126/science.2494700. [DOI] [PubMed] [Google Scholar]
  25. Landschulz W. H., Johnson P. F., McKnight S. L. The leucine zipper: a hypothetical structure common to a new class of DNA binding proteins. Science. 1988 Jun 24;240(4860):1759–1764. doi: 10.1126/science.3289117. [DOI] [PubMed] [Google Scholar]
  26. Lieu T. S., Newkirk M. M., Capra J. D., Sontheimer R. D. Molecular characterization of human Ro/SS-A antigen. Amino terminal sequence of the protein moiety of human Ro/SS-A antigen and immunological activity of a corresponding synthetic peptide. J Clin Invest. 1988 Jul;82(1):96–101. doi: 10.1172/JCI113607. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. McCauliffe D. P., Lux F. A., Lieu T. S., Sanz I., Hanke J., Newkirk M. M., Bachinski L. L., Itoh Y., Siciliano M. J., Reichlin M. Molecular cloning, expression, and chromosome 19 localization of a human Ro/SS-A autoantigen. J Clin Invest. 1990 May;85(5):1379–1391. doi: 10.1172/JCI114582. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Needleman S. B., Wunsch C. D. A general method applicable to the search for similarities in the amino acid sequence of two proteins. J Mol Biol. 1970 Mar;48(3):443–453. doi: 10.1016/0022-2836(70)90057-4. [DOI] [PubMed] [Google Scholar]
  29. Patarca R., Freeman G. J., Schwartz J., Singh R. P., Kong Q. T., Murphy E., Anderson Y., Sheng F. Y., Singh P., Johnson K. A. rpt-1, an intracellular protein from helper/inducer T cells that regulates gene expression of interleukin 2 receptor and human immunodeficiency virus type 1. Proc Natl Acad Sci U S A. 1988 Apr;85(8):2733–2737. doi: 10.1073/pnas.85.8.2733. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Provost T. T., Reichlin M. Immunopathologic studies of cutaneous lupus erythematosus. J Clin Immunol. 1988 Jul;8(4):223–233. doi: 10.1007/BF00916550. [DOI] [PubMed] [Google Scholar]
  31. Rader M. D., O'Brien C., Liu Y. S., Harley J. B., Reichlin M. Heterogeneity of the Ro/SSA antigen. Different molecular forms in lymphocytes and red blood cells. J Clin Invest. 1989 Apr;83(4):1293–1298. doi: 10.1172/JCI114014. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Sanger F. Determination of nucleotide sequences in DNA. Science. 1981 Dec 11;214(4526):1205–1210. doi: 10.1126/science.7302589. [DOI] [PubMed] [Google Scholar]
  33. Sassone-Corsi P., Ransone L. J., Lamph W. W., Verma I. M. Direct interaction between fos and jun nuclear oncoproteins: role of the 'leucine zipper' domain. Nature. 1988 Dec 15;336(6200):692–695. doi: 10.1038/336692a0. [DOI] [PubMed] [Google Scholar]
  34. Southern E. M. Detection of specific sequences among DNA fragments separated by gel electrophoresis. J Mol Biol. 1975 Nov 5;98(3):503–517. doi: 10.1016/s0022-2836(75)80083-0. [DOI] [PubMed] [Google Scholar]
  35. Takahashi M., Cooper G. M. ret transforming gene encodes a fusion protein homologous to tyrosine kinases. Mol Cell Biol. 1987 Apr;7(4):1378–1385. doi: 10.1128/mcb.7.4.1378. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Takahashi M., Inaguma Y., Hiai H., Hirose F. Developmentally regulated expression of a human "finger"-containing gene encoded by the 5' half of the ret transforming gene. Mol Cell Biol. 1988 Apr;8(4):1853–1856. doi: 10.1128/mcb.8.4.1853. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Takahashi M., Ritz J., Cooper G. M. Activation of a novel human transforming gene, ret, by DNA rearrangement. Cell. 1985 Sep;42(2):581–588. doi: 10.1016/0092-8674(85)90115-1. [DOI] [PubMed] [Google Scholar]
  38. Tan E. M. Antinuclear antibodies: diagnostic markers for autoimmune diseases and probes for cell biology. Adv Immunol. 1989;44:93–151. doi: 10.1016/s0065-2776(08)60641-0. [DOI] [PubMed] [Google Scholar]
  39. Towbin H., Staehelin T., Gordon J. Electrophoretic transfer of proteins from polyacrylamide gels to nitrocellulose sheets: procedure and some applications. Proc Natl Acad Sci U S A. 1979 Sep;76(9):4350–4354. doi: 10.1073/pnas.76.9.4350. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Wolin S. L., Steitz J. A. The Ro small cytoplasmic ribonucleoproteins: identification of the antigenic protein and its binding site on the Ro RNAs. Proc Natl Acad Sci U S A. 1984 Apr;81(7):1996–2000. doi: 10.1073/pnas.81.7.1996. [DOI] [PMC free article] [PubMed] [Google Scholar]

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