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Somatic Hypermutation in Muts Homologue (Msh)3-, Msh6-, and Msh3/Msh6-Deficient Mice Reveals a Role for the Msh2–Msh6 Heterodimer in Modulating the Base Substitution Pattern

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Wiesendanger, Margrit, Kneitz, Burkhard, Edelmann, Winfried, Scharff, Matthew D.·2000·The Journal of Experimental Medicine

Abstract

Although the primary function of the DNA mismatch repair (MMR) system is to identify and correct base mismatches that have been erroneously introduced during DNA replication, recent studies have further implicated several MMR components in somatic hypermutation of immunoglobulin (Ig) genes. We studied the immune response in mice deficient in MutS homologue (MSH)3 and MSH6, two mutually exclusive partners of MSH2 that have not been examined previously for their role in Ig hypermutation. In Msh6−/− and Msh3−/−/Msh6−/− mice, base substitutions are preferentially targeted to G and C nucleotides and to an RGYW hot spot, as has been shown previously in Msh2−/− mice. In contrast, Msh3−/− mice show no differences from their littermate controls. These findings indicate that the MSH2–MSH6 heterodimer, but not the MSH2–MSH3 complex, is responsible for modulating Ig hypermutation.

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Metadata

Authors
Wiesendanger, M., Kneitz, B., Edelmann, W., & Scharff, M. D.
Venue
The Journal of Experimental Medicine
Published
2000-02-07
Volume
191
Issue
3
Pages
579-584
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2166617268
Cited by
195
References
0
FWCI
4.73
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Somatic Hypermutation in Muts Homologue (Msh)3-, Msh6-, and Msh3/Msh6-Deficient Mice Reveals a Role for the Msh2–Msh6 Heterodimer in Modulating the Base Substitution Pattern. https://app.cochat.ai/papers/10.1084/jem.191.3.579
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Wiesendanger, M., Kneitz, B., Edelmann, W., & Scharff, M. D. (2000). Somatic Hypermutation in Muts Homologue (Msh)3-, Msh6-, and Msh3/Msh6-Deficient Mice Reveals a Role for the Msh2–Msh6 Heterodimer in Modulating the Base Substitution Pattern. The Journal of Experimental Medicine. https://doi.org/10.1084/jem.191.3.579

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