Plasticity of repetitive DNA sequences within a bacterial (Type IV) secretion system component.
Plasticity of repetitive DNA sequences within a bacterial (Type IV) secretion system component.
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DOI:
10.1084/jem.20030381
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发表时间:
2003-11-03
期刊:
影响因子:
--
通讯作者:
Blaser MJ
中科院分区:
文献类型:
--
作者:
Aras RA;Fischer W;Perez-Perez GI;Crosatti M;Ando T;Haas R;Blaser MJ
DNA rearrangement permits bacteria to regulate gene content and expression. In Helicobacter pylori, cagY, which contains an extraordinary number of direct DNA repeats, encodes a surface-exposed subunit of a (type IV) bacterial secretory system. Examining potential DNA rearrangements involving the cagY repeats indicated that recombination events invariably yield in-frame open reading frames, producing alternatively expressed genes. In individual hosts, H. pylori cell populations include strains that produce CagY proteins that differ in size, due to the predicted in-frame deletions or duplications, and elicit minimal or no host antibody recognition. Using repetitive DNA, H. pylori rearrangements in a host-exposed subunit of a conserved bacterial secretion system may permit a novel form of antigenic evasion.
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