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[Rat bladder ubiquitin-like molecule: isolation, purification and N-terminal sequencing]
B Wang1, S S Harwig, R I Lehrer
1School of Basic Medical Sciences, UCLA-Center for the Health Sciences.
Hua Xi Yi Ke Da Xue Xue Bao = Journal of West China University of Medical Sciences = Huaxi Yike Daxue Xuebao
|June 1, 1993
Summary
Researchers discovered a ubiquitin-like peptide in rat bladders, homologous to human ubiquitin. This suggests mucosal epithelium may function as immune cells, secreting molecules to combat microbes.
Area of Science:
- Biochemistry
- Immunology
- Cell Biology
Context:
- Accidental isolation of a novel peptide during antibacterial peptide research.
- Purification via reverse-phase high-performance liquid chromatography.
- N-terminal sequencing revealed homology to human ubiquitin.
Purpose:
- To characterize a newly isolated peptide from rat bladder.
- To investigate the potential immune function of mucosal epithelium.
Summary:
- A ubiquitin-like peptide was identified in rat bladder tissue.
- The peptide's sequence is homologous to human ubiquitin.
- This finding, alongside endogenous antibacterial polypeptides, suggests mucosal epithelium's role in immunity.
Impact:
- Proposes mucosal epithelium as immune or immunity-associated cells.
- Suggests direct microbial killing and immune response regulation by mucosal cells.
- Highlights a potential new mechanism in mucosal immunity.