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fester, A candidate allorecognition receptor from a primitive chordate
Spencer V Nyholm1, Emmanuelle Passegue, William B Ludington
1Department of Pathology, Stanford University School of Medicine, California 94305, USA.
Immunity
|July 25, 2006
Summary
Researchers identified the "fester" gene in Botryllus schlosseri, a primitive chordate, which plays a key role in histocompatibility. This gene
Area of Science:
- Marine biology
- Immunology
- Genetics
Background:
- Histocompatibility in Botryllus schlosseri is regulated by the highly polymorphic FuHC locus.
- Understanding the genetic basis of histocompatibility is crucial for evolutionary and immunological studies.
Purpose of the Study:
- To identify novel genes involved in histocompatibility in Botryllus schlosseri.
- To elucidate the function and genetic basis of the newly identified "fester" locus.
Main Methods:
- Forward genetic screens to identify genes near the FuHC locus.
- Analysis of genetic polymorphism, inheritance patterns (haplotypes), and alternative splicing.
- Functional validation using siRNA-mediated knockdown and monoclonal antibody blocking.
Main Results:
- A novel locus, "fester," was identified near the FuHC locus, exhibiting polymorphism, polygenic inheritance, and distinct haplotypes.
- Extensive alternative splicing of fester generates a unique repertoire of splice forms in each individual.
- Functional studies demonstrated that manipulating fester disrupts predicted histocompatibility outcomes.
Conclusions:
- The genetic and somatic diversity of fester, along with its expression patterns and functional role, strongly suggests it acts as a receptor involved in histocompatibility.
- Fester represents a significant discovery in understanding the complex mechanisms of histocompatibility in primitive chordates.
- This research provides new insights into the evolution of immune recognition systems.
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