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Site‐specificity of serine integrase demonstrated by the attB sequence preference of ɸ BT 1 integrase
Author(s) -
Lei Xiaolai,
Wang Lu,
Zhao Guoping,
Ding Xiaoming
Publication year - 2018
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1002/1873-3468.13023
Subject(s) - integrase , integrases , site specific recombination , recombination , genetics , biology , sequence motif , dna , recombinase , serine , gene , phosphorylation
Serine integrases mediate site‐specific recombination and are extensively applied in genetic engineering and synthetic biology. However, which regions of the attachment sites determine site‐specificity and how these regions function in recombination remain elusive. Here, we explored the sequence features of attB attachment sites recognized by ɸ BT 1 integrase, a representative serine integrase. A 34‐bp DNA motif is found that displays distinct base‐specific preference for every position. Further investigation of mutations at different positions within the attB sequence shows different recombination efficiencies and binding affinities. We found four conserved regions within the attB motif that coincide with the results of recombination assays, and mutations in the attB sequence that hamper recombination almost all cause reduced binding affinity.