Somatic hypermutation in the absence of DNA-dependent protein kinase catalytic subunit (DNA-PK(cs)) or recombination-activating gene (RAG)1 activity
(2000) In Journal of Experimental Medicine 192(10). p.1509-1514- Abstract
Somatic hypermutation and isotype switch recombination occur in germinal center B cells, are linked to transcription, and are similarly affected by deficiency in MutS homologue (MSH)2. Class-switch recombination is abrogated by disruption of genes encoding components of the catalytic subunit of DNA-dependent protein kinase (DNA-PK(cs))/Ku complex and likely involves nonhomologous end joining (NHEJ). That somatic hypermutation might also be associated with end joining is suggested by its association with the creation of deletions, duplications, and sites accessible to terminal transferase. However, a requirement for NHEJ in the mutation process has not been demonstrated. Here we show that somatic mutation in mice deficient in NHEJ can be... (More)
Somatic hypermutation and isotype switch recombination occur in germinal center B cells, are linked to transcription, and are similarly affected by deficiency in MutS homologue (MSH)2. Class-switch recombination is abrogated by disruption of genes encoding components of the catalytic subunit of DNA-dependent protein kinase (DNA-PK(cs))/Ku complex and likely involves nonhomologous end joining (NHEJ). That somatic hypermutation might also be associated with end joining is suggested by its association with the creation of deletions, duplications, and sites accessible to terminal transferase. However, a requirement for NHEJ in the mutation process has not been demonstrated. Here we show that somatic mutation in mice deficient in NHEJ can be tested by introduction of rearranged immunoglobulin and T cell receptor transgenes: the transgene combination not only permits reconstitution of peripheral lymphoid compartments but also allows formation of germinal centers, despite the wholly monoclonal nature of the lymphocyte antigen receptors in these animals. Using this strategy, we confirm that somatic hypermutation like class-switching can occur in the absence of recombination-activating gene (RAG)1 but show that the two processes differ in that hypermutation can proceed essentially unaffected by deficiency in DNA-PK(cs) activity.
(Less)
- author
- Bemark, Mats LU ; Sale, Julian E. ; Kim, Hye Jung ; Berek, Claudia ; Cosgrove, Ruth A. and Neuberger, Michael S.
- publishing date
- 2000-11-20
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- B lymphocyte, End-joining, Immunoglobulin gene, Mutation, Switch recombination
- in
- Journal of Experimental Medicine
- volume
- 192
- issue
- 10
- pages
- 1509 - 1514
- publisher
- Rockefeller University Press
- external identifiers
-
- pmid:11085752
- scopus:0034694086
- ISSN
- 0022-1007
- DOI
- 10.1084/jem.192.10.1509
- language
- English
- LU publication?
- no
- id
- bb993f63-1f72-4f2c-8f30-a47c911e98b7
- date added to LUP
- 2023-12-06 16:47:46
- date last changed
- 2024-02-19 09:27:41
@article{bb993f63-1f72-4f2c-8f30-a47c911e98b7, abstract = {{<p>Somatic hypermutation and isotype switch recombination occur in germinal center B cells, are linked to transcription, and are similarly affected by deficiency in MutS homologue (MSH)2. Class-switch recombination is abrogated by disruption of genes encoding components of the catalytic subunit of DNA-dependent protein kinase (DNA-PK(cs))/Ku complex and likely involves nonhomologous end joining (NHEJ). That somatic hypermutation might also be associated with end joining is suggested by its association with the creation of deletions, duplications, and sites accessible to terminal transferase. However, a requirement for NHEJ in the mutation process has not been demonstrated. Here we show that somatic mutation in mice deficient in NHEJ can be tested by introduction of rearranged immunoglobulin and T cell receptor transgenes: the transgene combination not only permits reconstitution of peripheral lymphoid compartments but also allows formation of germinal centers, despite the wholly monoclonal nature of the lymphocyte antigen receptors in these animals. Using this strategy, we confirm that somatic hypermutation like class-switching can occur in the absence of recombination-activating gene (RAG)1 but show that the two processes differ in that hypermutation can proceed essentially unaffected by deficiency in DNA-PK(cs) activity.</p>}}, author = {{Bemark, Mats and Sale, Julian E. and Kim, Hye Jung and Berek, Claudia and Cosgrove, Ruth A. and Neuberger, Michael S.}}, issn = {{0022-1007}}, keywords = {{B lymphocyte; End-joining; Immunoglobulin gene; Mutation; Switch recombination}}, language = {{eng}}, month = {{11}}, number = {{10}}, pages = {{1509--1514}}, publisher = {{Rockefeller University Press}}, series = {{Journal of Experimental Medicine}}, title = {{Somatic hypermutation in the absence of DNA-dependent protein kinase catalytic subunit (DNA-PK(cs)) or recombination-activating gene (RAG)1 activity}}, url = {{http://dx.doi.org/10.1084/jem.192.10.1509}}, doi = {{10.1084/jem.192.10.1509}}, volume = {{192}}, year = {{2000}}, }