Chemokine receptor CCR5: Polymorphism at protein level

Shunji Suzuki, Tomoko Miyagi, Linda F. Chuang, Peter M. Yau, Roy H. Doi, Ronald Y. Chuang

Research output: Contribution to journalArticlepeer-review

Abstract

Polymorphisms in chemokine receptor CCR5 genes have been implicated in HIV disease progression, resistance, or non-progressive infection. Multiple CCR5 transcripts and mRNA diversity have also been identified. This study presents evidence to show that two distinct forms of CCR5 protein, 62 and 42 kDa, are present in human lymphocytic cells and monkey peripheral blood mononuclear cells. The ratio of these two forms of CCR5 changes with cell growth. The 62 kDa CCR5 predominates if the electrophoresis sample buffer does not contain reducing agent. However, the 62 and the 42 kDa CCR5 are not interconvertible. Morphine sulfate induces the formation and expression of both forms of CCR5 whereas RANTES, MIP-1 α or MIP-1 β inhibits them. Localization studies indicate that the 62 kDa CCR5 resides mainly on the cell membrane and the 42 kDa CCR5 is present solely in the cytoplasm of the cells.

Original languageEnglish (US)
Pages (from-to)477-483
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume296
Issue number2
DOIs
StatePublished - 2002
Externally publishedYes

Keywords

  • CCR5 polymorphism
  • Chemokine
  • Chemokine receptor CCR5
  • Morphine sulfate

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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