Related Experiment Videos
MUC17, a novel membrane-tethered mucin
James R Gum1, Suzanne C Crawley, James W Hicks
1Gastrointestinal Research Laboratory (151M2), Department of Veterans Affairs Medical Center, 4150 Clement Street, San Francisco, California 94121, USA. jgum@itsa.ucsf.edu
Biochemical and Biophysical Research Communications
|February 22, 2002
Summary
Researchers identified a novel membrane mucin, MUC17, in the intestine. This gene is also found in some cancers and resides in a cluster with other mucin genes on chromosome 7.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Membrane mucins play vital roles in epithelial cells, including protection, metastasis, and signaling.
- Understanding novel mucins is crucial for deciphering their diverse cellular functions.
Purpose of the Study:
- To characterize a newly identified large membrane mucin, MUC17, from normal intestinal tissue.
- To investigate the expression patterns and chromosomal location of MUC17.
Main Methods:
- RNA blot analysis and in situ hybridization were used to determine MUC17 expression.
- Radiation hybrid mapping was employed to localize the MUC17 gene on the human genome.
Main Results:
- A novel mucin, MUC17, was identified with a unique structure including EGF-like and SEA domains.
- MUC17 expression was detected in specific pancreatic and colon cancer cell lines, as well as intestinal absorptive cells.
- The MUC17 gene was mapped to chromosome 7q22, near other membrane mucin genes (MUC3A, MUC3B, MUC12).
Conclusions:
- MUC17 is a novel membrane mucin expressed in the intestine and certain cancer cell lines.
- MUC17 is part of a gene cluster on chromosome 7, suggesting potential co-evolution or shared regulatory mechanisms.
- Despite co-localization, MUC17 and neighboring mucins likely possess distinct tissue-specific functions.