Domain orientation in the N-Terminal PDZ tandem from PSD-95 is maintained in the full-length protein.
Domain orientation in the N-Terminal PDZ tandem from PSD-95 is maintained in the full-length protein.
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DOI:
10.1016/j.str.2011.02.017
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发表时间:
2011-06-08
期刊:
影响因子:
5.7
通讯作者:
Bowen, Mark E.
中科院分区:
文献类型:
--
作者:
McCann, James J.;Zheng, Liqiang;Chiantia, Salvatore;Bowen, Mark E.
Tandem PDZ domains have been suggested to form structurally-independent supramodules. However, dissimilarity between crystallography and NMR models emphasize their malleable conformation. Studies in full length scaffold proteins are needed to examine the effect of tertiary interactions within their native context. Using single molecule fluorescence to characterize the N-terminal PDZ tandem in PSD-95, we provide the first direct evidence that PDZ tandems can be structurally-independent within a full-length scaffold protein. Molecular refinement using our data converged on a single structure with an antiparallel alignment of the ligand binding sites. Devoid of interaction partners, single molecule conditions captured PSD-95 in its unbound, ground state. Interactions between PDZ domains could not be detected while fluctuation correlation spectroscopy showed that other conformations are dynamically sampled. We conclude that ultra-weak interactions stabilize the conformation providing a “low-relief” energy landscape that allows the domain orientation to be flipped by environmental interactions.
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影响因子:
3
作者:
Brunger, Axel T.;Strop, Pavel;Vrljic, Marija;Chu, Steven;Weninger, Keith R.
通讯作者:
Weninger, Keith R.
DOI:
10.1073/pnas.0500127102
发表时间:
2005-02-15
影响因子:
11.1
作者:
Chattopadhyay, K;Elson, EL;Frieden, C
通讯作者:
Frieden, C
影响因子:
5.7
作者:
Cierpicki, T;Bushweller, JH;Derewenda, ZS
通讯作者:
Derewenda, ZS
影响因子:
16.8
作者:
通讯作者:
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DOI:
10.1073/pnas.172524899
发表时间:
2002-10-29
影响因子:
11.1
作者:
Chattopadhyay, K;Saffarian, S;Frieden, C
通讯作者:
Frieden, C