A motif in the C-terminal domain of ϕC31 integrase controls the directionality of recombination
A motif in the C-terminal domain of ϕC31 integrase controls the directionality of recombination
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ÏC31 整合酶 C 端结构域中的基序控制重组的方向性
DOI:
--
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发表时间:
2008
影响因子:
14.9
通讯作者:
Margaret C. M. Smith
中科院分区:
文献类型:
--
作者:
Paul A. Rowley;Matthew C. A. Smith;Ellen Younger;Margaret C. M. Smith
Bacteriophage ϕC31 encodes an integrase, which acts on the phage and host attachment sites, attP and attB, to form an integrated prophage flanked by attL and attR. In the absence of accessory factors, ϕC31 integrase cannot catalyse attL x attR recombination to excise the prophage. To understand the mechanism of directionality, mutant integrases were characterized that were active in excision. A hyperactive integrase, Int E449K, gained the ability to catalyse attL x attR, attL x attL and attR x attR recombination whilst retaining the ability to recombine attP x attB. A catalytically defective derivative of this mutant, Int S12A, E449K, could form stable complexes with attP/attB, attL/attR, attL/attL and attR/attR under conditions where Int S12A only complexed with attP/attB. Further analysis of the Int E449K-attL/attR synaptic events revealed a preference for one of the two predicted synapse structures with different orientations of the attL/attR sites. Several amino acid substitutions conferring hyperactivity, including E449K, were localized to one face of a predicted coiled-coil motif in the C-terminal domain. This work shows that a motif in the C-terminal domain of ϕC31 integrase controls the formation of the synaptic interface in both integration and excision, possibly through a direct role in protein–protein interactions.
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DOI:
10.1128/9781555817954
发表时间:
2002
期刊:
--
影响因子:
--
作者:
N. Craig;M. Chandler;M. Gellert;A. Lambowitz;P. Rice;S. Sandmeyer
通讯作者:
N. Craig;M. Chandler;M. Gellert;A. Lambowitz;P. Rice;S. Sandmeyer
影响因子:
14.9
作者:
Lewis, JA;Hatfull, GF
通讯作者:
Hatfull, GF
影响因子:
16
作者:
Ghosh, P;Kim, AI;Hatfull, GF
通讯作者:
Hatfull, GF
DOI:
10.1073/pnas.090527097
发表时间:
2000-05-23
影响因子:
11.1
作者:
Groth, AC;Olivares, EC;Calos, MP
通讯作者:
Calos, MP
影响因子:
5.6
作者:
Ghosh, P;Pannunzio, NR;Hatfull, GF
通讯作者:
Hatfull, GF