Immunology. 1998 Feb;93(2):171-6.

Inherent properties of somatic hypermutation as revealed by human non-productive VH6 immunoglobulin rearrangements.

Varade WS, Carnahan JA, Kingsley PD, Insel RA.

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University of Rochester School of Medicine, NY 14642, USA.

Abstract

To study inherent properties of somatic hypermutation of human immunoglobulin genes in the absence of antigen selection, mutations of human non-productive VH6 rearrangements enriched by subtractive hybridization were characterized. Ten unique clones arising from nine non-productive rearrangements were isolated. The frequency of mutation was 3.0%. Analysis of these mutations showed intrinsic bias for transitions and cytosine (C) to guanine (G) and G to C transversions. Bias for the strand of DNA targeted by mutation was not evident. Replacement mutations in the complementarity-determining region (CDR) occurred more frequently than expected based on the primary DNA sequence. This targeting of replacement mutations to the CDR may explain the conservation of the VH6 sequence in primates.

PMID:: 9616365; [PubMed - indexed for MEDLINE]
PMCID: PMC1364175

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Publication Types, MeSH Terms, Substances, Grant Support

Publication Types

Research Support, U.S. Gov't, P.H.S.

MeSH Terms

Substances

Immunoglobulin Variable Region

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