Immunogenetics

, Volume 34, Issue 6, pp 358–365 | Cite as

Structure function analysis of theH-2 Ab p gene

  • Jonathan A. Harton
  • Wayne Litaker
  • Jeffrey A. Frelinger
  • Gail A. Bishop
Original Articles

Abstract

The gene encoding the H-2A p class IIβ chain was isolated from a B10.P genomic library and sequenced. This gene was also used to construct transfectants of the CH12 lymphoma clone CH12.LX, which express the Abp gene product in association with the endogenous A α k chain. We present here the first report of the complete nucleotide coding sequence of Abp. The predicted amino acid sequence of Abp reveals only five residues different from Ab q, four of which are present in the mature peptide. These four amino acid changes could account for the differential susceptibility of H-2 q vs H-2 p mice to the development of collagen-induced arthritis (CIA). Antibodies specific for the transfected Abp protein induce CH 12. LX cells to secrete immunoglobulin in the presence of antigen. Comparison of the amino acid sequence with other A β chains that have been tested in signal transduction experiments suggests that amino acid 9 may be important to the signaling ability of class II A molecules.

Keywords

Arthritis Lymphoma Amino Acid Sequence Structure Function Amino Acid Change 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Jonathan A. Harton
    • 1
  • Wayne Litaker
    • 4
  • Jeffrey A. Frelinger
    • 4
  • Gail A. Bishop
    • 1
    • 2
    • 3
  1. 1.Department of MicrobiologyUniversity of IowaIowa CityUSA
  2. 2.Department of Internal MedicineUniversity of IowaIowa CityUSA
  3. 3.The Iowa City Veterans' Administration Medical CenterIowa CityUSA
  4. 4.Department of Microbiology and ImmunologyUniversity of North CarolinaChapel HillUSA

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