Differential expression of peptidoglycan recognition protein 2 in the skin and liver requires different transcription factors

Xinna Li, Shiyong Wang, Haitao Wang, Dipika Gupta

Research output: Contribution to journalArticle

26 Scopus citations


Human peptidoglycan recognition protein 2 (PGLYRP2) is an N-acetylmuramoyl-L-alanine amidase that hydrolyzes bacterial peptidoglycan and is differentially expressed in the two major organs in the human body, liver and skin. PGLYRP2 has a high constitutive expression in the liver but is not expressed in healthy human skin. PGLYRP2 mRNA is also not expressed in cultured human keratinocytes but is highly induced upon exposure to bacteria. In this study we identified the transcription start site for pglyrp2 and demonstrated that the differential expression of PGLYRP2 in hepatocytes and keratinocytes is regulated by different transcription factors whose binding sequences are located in different regions of the pglyrp2 promoter. Induction of pglyrp2 in keratinocytes is regulated by sequences in the distal region of the promoter and requires transcription factors NF-κB and Sp1, whereas constitutive expression of pglyrp2 in a hepatocyte cell line is regulated by sequences in the proximal region of the promoter and requires transcription factors c-Jun and ATF2. Regulation of constitutive and inducible expression of pglyrp2 is important for systemic and local innate immune responses to bacterial infections.

Original languageEnglish (US)
Pages (from-to)20738-20748
Number of pages11
JournalJournal of Biological Chemistry
Issue number30
StatePublished - Jul 28 2006


ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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