Weak intra-ring allosteric communications of the archaeal chaperonin thermosome revealed by normal mode analysis.
Weak intra-ring allosteric communications of the archaeal chaperonin thermosome revealed by normal mode analysis.
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正态模式分析揭示了古菌伴侣蛋白热体的环内变构通讯较弱。
DOI:
10.1016/j.bpj.2012.07.049
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发表时间:
2012
影响因子:
3.4
通讯作者:
Stan,George
中科院分区:
文献类型:
--
作者:
Jayasinghe,Manori;Shrestha,Pooja;Wu,Xiongwu;Tehver,Riina;Stan,George
Chaperonins are molecular machines that use ATP-driven cycles to assist misfolded substrate proteins to reach the native state. During the functional cycle, these machines adopt distinct nucleotide-dependent conformational states, which reflect large-scale allosteric changes in individual subunits. Distinct allosteric kinetics has been described for the two chaperonin classes. Bacterial (group I) chaperonins, such as GroEL, undergo concerted subunit motions within each ring, whereas archaeal and eukaryotic chaperonins (group II) undergo sequential subunit motions. We study these distinct mechanisms through a comparative normal mode analysis of monomer and double-ring structures of the archaeal chaperonin thermosome and GroEL. We find that thermosome monomers of each type exhibit common low-frequency behavior of normal modes. The observed distinct higher-frequency modes are attributed to functional specialization of these subunit types. The thermosome double-ring structure has larger contribution from higher-frequency modes, as it is found in the GroEL case. We find that long-range intersubunit correlation of amino-acid pairs is weaker in the thermosome ring than in GroEL. Overall, our results indicate that distinct allosteric behavior of the two chaperonin classes originates from different wiring of individual subunits as well as of the intersubunit communications.
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DOI:
10.1111/j.1746-1561.1986.tb05779.x
发表时间:
1986-11
期刊:
The Journal of school health
影响因子:
--
作者:
M. Pentz;C. Cormack;B. Flay;W. B. Hansen;C. Johnson
通讯作者:
M. Pentz;C. Cormack;B. Flay;W. B. Hansen;C. Johnson
DOI:
--
发表时间:
1947
期刊:
影响因子:
--
作者:
H. Hyman;P. Sheatsley
通讯作者:
P. Sheatsley
影响因子:
56.9
作者:
K. Warner
通讯作者:
K. Warner
影响因子:
3.8
作者:
E. Whelan;M. Sheridan;K. Meister;B. A. Mosher
通讯作者:
B. A. Mosher
影响因子:
22.4
作者:
C. S. Bell;R. Battjes
通讯作者:
R. Battjes