TALOS+: a hybrid method for predicting protein backbone torsion angles from NMR chemical shifts.
TALOS+: a hybrid method for predicting protein backbone torsion angles from NMR chemical shifts.
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DOI:
10.1007/s10858-009-9333-z
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发表时间:
2009-08
影响因子:
2.7
通讯作者:
Bax A
中科院分区:
文献类型:
--
作者:
Shen Y;Delaglio F;Cornilescu G;Bax A
NMR chemical shifts in proteins depend strongly on local structure. The program TALOS establishes an empirical relation between 13C, 15N and 1H chemical shifts and backbone torsion angles φ and ψ (G. Cornilescu et al. J. Biomol. NMR. 13, 289–302, 1999). Extension of the original 20-protein database to 200 proteins increased the fraction of residues for which backbone angles could be predicted from 65 to 74%, while reducing the error rate from 3 to 2.5 percent. Addition of a two-layer neural network filter to the database fragment selection process forms the basis for a new program, TALOS+, which further enhances the prediction rate to 88.5%, without increasing the error rate. Excluding the 2.5% of residues for which TALOS makes predictions that strongly differ from those observed in the crystalline state, the accuracy of predicted φ and ψ angles, equals ±13°. Large discrepancies between predictions and crystal structures are primarily limited to loop regions, and for the few cases where multiple X-ray structures are available such residues are often found in different states in the different structures. The TALOS+ output includes predictions for individual residues with missing chemical shifts, and the neural network component of the program also predicts secondary structure with good accuracy.
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DOI:
10.1038/2345
发表时间:
1998-10-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Cai, M;Huang, Y;Clore, GM
通讯作者:
Clore, GM
影响因子:
8
作者:
Hung, LH;Samudrala, R
通讯作者:
Samudrala, R
影响因子:
5.6
作者:
ROST, B;SANDER, C
通讯作者:
SANDER, C
DOI:
10.1073/pnas.0610313104
发表时间:
2007-06-05
影响因子:
11.1
作者:
Cavalli, Andrea;Salvatella, Xavier;Vendruscolo, Michele
通讯作者:
Vendruscolo, Michele
影响因子:
2.7
作者:
Berjanskii, Mark V.;Wishart, David S.
通讯作者:
Wishart, David S.