Single-molecule dynamics of lysozyme processing distinguishes linear and cross-linked peptidoglycan substrates.
Single-molecule dynamics of lysozyme processing distinguishes linear and cross-linked peptidoglycan substrates.
复制标题
DOI:
10.1021/ja211540z
复制
发表时间:
2012-02-01
影响因子:
15
通讯作者:
Weiss, Gregory A.
中科院分区:
文献类型:
--
作者:
Choi, Yongki;Moody, Issa S.;Sims, Patrick C.;Hunt, Steven R.;Corso, Brad L.;Seitz, David E.;Blaszcazk, Larry C.;Collins, Philip G.;Weiss, Gregory A.
The dynamic processivity of individual T4 lysozyme molecules was monitored in the presence of either linear or cross-linked peptidoglycan substrates. Single molecule monitoring was accomplished using a novel electronic technique in which lysozyme molecules were tethered to single-walled carbon nanotube field effect transistors through pyrene linker molecules. The substrate driven, hinge bending motions of lysozyme induced dynamic electronic signals in the underlying transistor, allowing long-term monitoring of the same molecule without the limitations of optical quenching or bleaching. For both substrates, lysozyme exhibits processive slow turnover rates of 20 – 50 s−1 and rapid 200 – 400 s−1 non-productive motions. The latter, nonproductive binding events occupy 43% of the enzyme’s time in the presence of the cross-linked peptidoglycan, but only 7% with the linear substrate. Furthermore, lysozyme catalyzed the hydrolysis of glycosidic bonds to the end of the linear substrate, but appears to sidestep the peptide cross-links to zigzag through the wild-type substrate.
登录
查看更多内容
DOI:
10.1126/science.1198542
发表时间:
2011-04-08
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Bhabha G;Lee J;Ekiert DC;Gam J;Wilson IA;Dyson HJ;Benkovic SJ;Wright PE
通讯作者:
Wright PE
DOI:
10.1073/pnas.96.3.893
发表时间:
1999-02-02
影响因子:
11.1
作者:
Ha, TJ;Ting, AY;Weiss, S
通讯作者:
Weiss, S
DOI:
10.1073/pnas.0837064100
发表时间:
2003-04-29
影响因子:
11.1
作者:
Chen, RJ;Bangsaruntip, S;Dai, HJ
通讯作者:
Dai, HJ
影响因子:
3.3
作者:
Chen, Y;Hu, DH;Lu, HP
通讯作者:
Lu, HP
影响因子:
56.9
作者:
Eisenmesser, EZ;Bosco, DA;Kern, D
通讯作者:
Kern, D