A Role for PCNA Ubiquitination in Immunoglobulin Hypermutation
2006
How DNA Repair Helps Antibodies Work Better
publication
Evidence: moderate
Author Information
Author(s): Hiroshi Arakawa, Stefan Jentsch, Jean-Marie Buerstedde
Hypothesis
Can the ubiquitination of PCNA influence immunoglobulin hypermutation in vertebrates?
Conclusion
The study shows that the PCNAK164R mutation impairs immunoglobulin hypermutation and increases sensitivity to DNA damage.
Supporting Evidence
- The PCNAK164R mutation reduces the ability of cells to undergo immunoglobulin hypermutation.
- Cells with the PCNAK164R mutation are more sensitive to DNA damage.
- Mono-ubiquitination of PCNA is crucial for recruiting error-prone DNA polymerases.
Takeaway
The study found that a specific change in a DNA repair protein makes immune cells worse at fighting infections because they can't mutate their antibodies properly.
Methodology
The authors used a chicken B cell line to study the effects of PCNA mutations on immunoglobulin hypermutation.
Digital Object Identifier (DOI)
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