Identification and sequence of an accessory factor required for activation of the human interferon gamma receptor

Cell. 1994 Mar 11;76(5):793-802. doi: 10.1016/0092-8674(94)90354-9.


Human chromosomes 6 and 21 are both necessary to confer sensitivity to human interferon gamma (Hu-IFN-gamma), as measured by induction of class I human leukocyte antigen (HLA) and protection against encephalomyocarditis virus (EMCV) infection. Whereas human chromosome 6 encodes the Hu-IFN-gamma receptor, human chromosome 21 encodes accessory factors for generating biological activity through the Hu-IFN-gamma receptor. Probes from a genomic clone were used to identity cDNA clones expressing a species-specific accessory factor. These cDNA clones are able to substitute for human chromosome 21 to reconstitute the Hu-IFN-gamma receptor-mediated induction of class I HLA antigens. However, the factor encoded by the cDNA does not confer full antiviral protection against EMCV, confirming that an additional factor encoded on human chromosome 21 is required for reconstitution of antiviral activity against EMCV. We conclude that this accessory factor belongs to a family of such accessory factors responsible for different actions of IFN-gamma.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Cattle
  • Chromosomes, Human, Pair 21
  • Cloning, Molecular
  • DNA Primers / chemistry
  • Gene Expression
  • Genes
  • HLA-B7 Antigen / metabolism
  • Humans
  • Interferon-gamma / physiology*
  • Molecular Sequence Data
  • RNA, Messenger / genetics
  • Receptors, Interferon / genetics*
  • Receptors, Interferon / physiology*
  • Restriction Mapping
  • Sequence Alignment
  • Sequence Homology, Amino Acid
  • Signal Transduction
  • Solubility
  • Viral Interference


  • DNA Primers
  • HLA-B7 Antigen
  • IFNGR2 protein, human
  • RNA, Messenger
  • Receptors, Interferon
  • interferon gamma receptor
  • Interferon-gamma

Associated data

  • GENBANK/U05875
  • GENBANK/U05877