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The diversity of connexin genes encoding gap junctional proteins
K Willecke1, H Hennemann, E Dahl
1Institut für Genetik (Abt. Molekulargenetik) Universität, Bonn/Bundersrepublik Deutschland.
European Journal of Cell Biology
|October 1, 1991
Summary
The mouse genome contains ten connexin genes, expanding the known connexin multigene family. This structural diversity suggests varied functions in cellular differentiation programs.
Area of Science:
- Molecular Biology
- Genomics
- Cell Biology
Background:
- Connexins form gap junctions crucial for intercellular communication.
- The full extent of the connexin multigene family was previously underestimated.
Purpose of the Study:
- To characterize novel connexin sequences in the mouse genome.
- To investigate the structural diversity and potential functions of newly identified connexin genes.
Main Methods:
- Bioinformatic analysis of mouse genome sequences.
- Isolation and characterization of cDNA sequences.
- RNA hybridization studies to determine expression patterns.
Main Results:
- Ten distinct connexin homologous sequences identified in the mouse genome.
- Five sequences likely represent mouse analogues of known rat connexins.
- Five additional sequences are likely functional connexin genes based on cDNA and mRNA data.
- Seven genomic connexin sequences lack introns in their coding regions, suggesting a conserved feature in mammalian connexin genes.
Conclusions:
- The connexin multigene family is larger than previously thought.
- Structural diversity among connexin genes implies diverse functional roles.
- Connexin gene diversity may be linked to cellular differentiation processes.