Effects of macromolecular crowding on the structure of a protein complex: a small-angle scattering study of superoxide dismutase.

Effects of macromolecular crowding on the structure of a protein complex: a small-angle scattering study of superoxide dismutase.
复制标题

DOI:
10.1016/j.bpj.2014.12.046
复制
发表时间:
2015-02-17
影响因子:
3.4
通讯作者:
Todd, Brian A.
Todd, Brian A.
中科院分区:
生物学3区
文献类型:
--
作者:
Rajapaksha, Ajith;Stanley, Christopher B.;Todd, Brian A.

文献摘要

参考文献

被引文献

相似文献

大分子拥挤可以改变生物大分子的结构和功能。我们使用小角散射来测量大分子拥挤对蛋白质复合物SOD(超氧化物歧化酶)大小的影响。使用400 MW PEG(聚乙二醇)、TEG(三甘醇)、α-MG(甲基-α-葡萄糖苷)和TMAO(三甲胺n-氧化物)诱导拥挤。平行小角中子散射和小角X射线散射使我们能够明确地将回转半径的明显变化归因于SOD结构的变化。对于40%PEG溶液,我们发现SOD的体积减少了9%。考虑到PEG引起的渗透压,这种变形对应于高度可压缩的结构。在TEG存在下进行的小角度X射线散射表明,对于进一步的变形-超过9%的体积减少-变形阻力可能会显着增加。
Macromolecular crowding can alter the structure and function of biological macromolecules. We used small-angle scattering to measure the effects of macromolecular crowding on the size of a protein complex, SOD (superoxide dismutase). Crowding was induced using 400 MW PEG (polyethylene glycol),TEG (triethylene glycol), α-MG (methyl-α-glucoside), and TMAO (trimethylamine n-oxide). Parallel small-angle neutron scattering and small-angle x-ray scattering allowed us to unambiguously attribute apparent changes in radius of gyration to changes in the structure of SOD. For a 40% PEG solution, we find that the volume of SOD was reduced by 9%. Considering the osmotic pressure due to PEG, this deformation corresponds to a highly compressible structure. Small-angle x-ray scattering done in the presence of TEG suggests that for further deformation—beyond a 9% decrease in volume—the resistance to deformation may increase dramatically.
DOI: 10.1016/j.jphotobiol.2007.04.002
发表时间: 2007-06-26
影响因子: 5.4
作者:
Janknegt, Paul J.;Rijstenbil, Jan W.;Buma, Anita G. J.
通讯作者: Buma, Anita G. J.
DOI: 10.1107/s0021889803012779
发表时间: 2003-10-01
影响因子: 6.1
作者:
Konarev, PV;Volkov, VV;Svergun, DI
通讯作者: Svergun, DI
DOI: 10.1002/prot.20478
发表时间: 2005-07-01
影响因子: 2.9
作者:
Rodier, F;Bahadur, RP;Janin, J
通讯作者: Janin, J
DOI: 10.1007/bf01452457
发表时间: 1984-01-01
影响因子: 2.4
作者:
MARKOVIC, I;OTTEWILL, RH;MARSH, JF
通讯作者: MARSH, JF
DOI: 10.1016/j.pbiomolbio.2004.01.012
发表时间: 2004-06-01
影响因子: 3.8
作者:
Schnell, S;Turner, TE
通讯作者: Turner, TE