| First Author | Min IM | Year | 2005 |
| Journal | J Exp Med | Volume | 201 |
| Issue | 12 | Pages | 1885-90 |
| PubMed ID | 15955838 | Mgi Jnum | J:99207 |
| Mgi Id | MGI:3581477 | Doi | 10.1084/jem.20042491 |
| Citation | Min IM, et al. (2005) Shifts in targeting of class switch recombination sites in mice that lack {micro} switch region tandem repeats or Msh2. J Exp Med 201(12):1885-90 |
| abstractText | The mechanisms that target class switch recombination (CSR) to antibody gene switch (S) regions are unknown. Analyses of switch site locations in wild-type mice and in mice that lack the Smu tandem repeats show shifts indicating that a 4-5-kb DNA domain (bounded upstream by the Imu promoter) is accessible for switching independent of Smu sequences. This CSR-accessible domain is reminiscent of the promoter-defined domains that target somatic hypermutation. Within the 4-5-kb CSR domain, the targeting of S site locations also depends on the Msh2 mismatch repair protein because Msh2-deficient mice show an increased focus of sites to the Smu tandem repeat region. We propose that Msh2 affects S site location because sequences with few activation-induced cytidine deaminase targets generate mostly switch DNA cleavages that require Msh2-directed processing to allow CSR joining. |
