» Articles » PMID: 15867095

Intricate Targeting of Immunoglobulin Somatic Hypermutation Maximizes the Efficiency of Affinity Maturation

Overview
Journal J Exp Med
Date 2005 May 4
PMID 15867095
Citations 37
Authors
Affiliations
Soon will be listed here.
Abstract

It is believed that immunoglobulin-variable region gene (IgV) somatic hypermutation (SHM) is initiated by activation-induced cytidine deaminase (AID) upon deamination of cytidine to deoxyuracil. Patch-excision repair of these lesions involving error prone DNA polymerases such as poleta causes mutations at all base positions. If not repaired, the deaminated nucleotides on the coding and noncoding strands result in C-to-T and G-to-A exchanges, respectively. Herein it is reported that IgV gene evolution has been considerably influenced by the need to accommodate extensive C deaminations and the resulting accumulation of C-to-T and G-to-A exchanges. Although seemingly counterintuitive, the precise placement of C and G nucleotides causes most C-to-T and G-to-A mutations to be silent or conservative. We hypothesize that without intricate positioning of C and G nucleotides the efficiency of affinity maturation would be significantly reduced due to a dominance of replacements caused by C and G transition mutations. The complexity of these evolved biases in codon use are compounded by the precise concomitant hotspot/coldspot targeting of AID activity and Poleta errors to maximize SHM in the CDRs and minimize mutations in the FWRs.

Citing Articles

Cellular and Molecular Immunity to Influenza Viruses and Vaccines.

Kasten-Jolly J, Lawrence D Vaccines (Basel). 2024; 12(4).

PMID: 38675771 PMC: 11154265. DOI: 10.3390/vaccines12040389.


Efficient evolution of human antibodies from general protein language models.

Hie B, Shanker V, Xu D, Bruun T, Weidenbacher P, Tang S Nat Biotechnol. 2023; 42(2):275-283.

PMID: 37095349 PMC: 10869273. DOI: 10.1038/s41587-023-01763-2.


Different B cell subpopulations show distinct patterns in their IgH repertoire metrics.

Ghraichy M, von Niederhausern V, Kovaltsuk A, Galson J, Deane C, Truck J Elife. 2021; 10.

PMID: 34661527 PMC: 8560093. DOI: 10.7554/eLife.73111.


Avidity optimization of a MAGE-A1-specific TCR with somatic hypermutation.

Bassan D, Gozlan Y, Sharbi-Yunger A, Tzehoval E, Greenstein E, Bitan L Eur J Immunol. 2021; 51(6):1505-1518.

PMID: 33835499 PMC: 8252751. DOI: 10.1002/eji.202049007.


Inferred Allelic Variants of Immunoglobulin Receptor Genes: A System for Their Evaluation, Documentation, and Naming.

Ohlin M, Scheepers C, Corcoran M, Lees W, Busse C, Bagnara D Front Immunol. 2019; 10:435.

PMID: 30936866 PMC: 6431624. DOI: 10.3389/fimmu.2019.00435.


References
1.
Oprea M, Kepler T . Genetic plasticity of V genes under somatic hypermutation: statistical analyses using a new resampling-based methodology. Genome Res. 1999; 9(12):1294-304. PMC: 310983. DOI: 10.1101/gr.9.12.1294. View

2.
Peters A, STORB U . Somatic hypermutation of immunoglobulin genes is linked to transcription initiation. Immunity. 1996; 4(1):57-65. DOI: 10.1016/s1074-7613(00)80298-8. View

3.
Muramatsu M, Kinoshita K, Fagarasan S, Yamada S, Shinkai Y, Honjo T . Class switch recombination and hypermutation require activation-induced cytidine deaminase (AID), a potential RNA editing enzyme. Cell. 2000; 102(5):553-63. DOI: 10.1016/s0092-8674(00)00078-7. View

4.
Revy P, Muto T, Levy Y, Geissmann F, Plebani A, Sanal O . Activation-induced cytidine deaminase (AID) deficiency causes the autosomal recessive form of the Hyper-IgM syndrome (HIGM2). Cell. 2000; 102(5):565-75. DOI: 10.1016/s0092-8674(00)00079-9. View

5.
Zan H, Komori A, Li Z, Cerutti A, Schaffer A, Flajnik M . The translesion DNA polymerase zeta plays a major role in Ig and bcl-6 somatic hypermutation. Immunity. 2001; 14(5):643-53. PMC: 4632985. DOI: 10.1016/s1074-7613(01)00142-x. View