Related Experiment Videos
KRC transcripts: identification of an unusual alternative splicing event
1The Ohio State Biochemistry Program, the Ohio State University, 480 West Ninth Avenue, Columbus OH 43210, USA.
Immunogenetics
|May 29, 1998
Summary
Mouse KRC protein isoforms arise from alternative splicing of its large gene. These splicing events can alter DNA-binding domains, potentially affecting gene transcription and immune system gene recombination.
Area of Science:
- Molecular Biology
- Immunology
- Genetics
Background:
- Mouse KRC (kappaB-related protein) is a large zinc finger protein.
- It binds to kappaB motifs in gene transcription and recognition signal sequences for immunoglobulin and T-cell receptor gene rearrangement.
Purpose of the Study:
- To investigate the alternative splicing of the mouse KRC gene.
- To understand how alternative splicing generates diverse KRC protein isoforms.
- To determine the functional implications of these splicing events on DNA-binding domains.
Main Methods:
- Analysis of mouse KRC gene transcripts from thymus and brain.
- Identification and characterization of differentially spliced transcripts.
- Investigation of exon skipping events, including large exons and internal fragments.
Main Results:
- The mouse KRC gene spans over 70 kb and produces multiple transcripts (~9.5 kb largest).
- Differential splicing generates KRC isoforms with varying N-termini and DNA-binding domains.
- Specific splicing events exclude exons encoding zinc finger motifs or skip fragments coding for the N-terminal DNA-binding domain.
Conclusions:
- Alternative splicing is a key mechanism generating KRC protein diversity.
- Exclusion or skipping of specific exons can lead to the elimination of functional DNA-binding domains.
- These findings suggest complex regulation of KRC function through alternative splicing.