Molecular dynamics simulation reveals preorganization of the chloroplast FtsY towards complex formation induced by GTP binding
文献类型：期刊论文
| 作者 | Yang, Ming-Jun1; Pang, Xue-Qin1; Zhang, Xin2; Han, Ke-Li1 |
| 刊名 | journal of structural biology
 |
| 出版日期 | 2011 |
| 卷号 | 173期号:1页码:57-66 |
| 关键词 | Signal recognition particle SRP GTPase Protein targeting reaction Chloroplast SRP system Protein-protein interaction |
| ISSN号 | 待补充 |
| 产权排序 | 1,1 |
| 通讯作者 | 韩克利 |
| 中文摘要 | molecular dynamics simulation reveals preorganization of the chloroplast ftsy towards complex formation induced by gtp binding |
| 英文摘要 | two gtpases in the signal recognition particle (srp) and srp receptor (sr) interact with one another to mediate the cotranslational protein targeting pathway. previous studies have shown that a universally conserved srp rna facilitates an efficient srp-sr interaction in the presence of a signal sequence bound to srp. however, a remarkable exception has been found in chloroplast srp (cpsrp) pathway, in which the srp rna is missing. based on biochemical and structural analyses, it is proposed that free cpsrp receptor (cpftsy) has already been preorganized into a closed state for efficient cpsrp-cpftsy association. however, no direct evidence has been reported to support this postulation thus far. in this study, we characterized the structural dynamics of cpftsy and its conformational rearrangements induced by gtp binding using molecular dynamics (md) simulations. our results showed that the gtp-binding event triggered substantial conformational changes in free cpftsy, including the relative orientation of n-g domain and several conserved motifs that are critical in complex formation. these rearrangements enabled the cpftsy to relax into a preorganized 'closed' state that favored the formation of a stable complex with cpsrp54. interestingly, the intrinsic flexibility of alpha n1 helix facilitated these rearrangements. in addition, gtp binding in cpftsy was mediated by conserved residues that have been shown in other srp gtpases. these findings suggested that gtp-bound cpftsy could fluctuate into conformations that are favorable to form the stable complex, providing explanation of why srp-sr interaction bypasses the requirement of the srp rna at a molecular level. (c) 2010 elsevier inc. all rights reserved. |
| WOS标题词 | science & technology ; life sciences & biomedicine |
| 学科主题 | 物理化学 |
| 类目[WOS] | biochemistry & molecular biology ; biophysics ; cell biology |
| 研究领域[WOS] | biochemistry & molecular biology ; biophysics ; cell biology |
| 关键词[WOS] | signal-recognition particle ; srp-receptor interaction ; conformational-changes ; endoplasmic-reticulum ; thylakoid membranes ; atomic charges ; mesh ewald ; ng domain ; protein ; rna |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000286123600007 |
| 公开日期 | 2012-07-09 |
| 源URL | [http://159.226.238.44/handle/321008/115234]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China 2.CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA |
| 推荐引用方式 GB/T 7714 | Yang, Ming-Jun,Pang, Xue-Qin,Zhang, Xin,et al. Molecular dynamics simulation reveals preorganization of the chloroplast FtsY towards complex formation induced by GTP binding[J]. journal of structural biology,2011,173(1):57-66. |
| APA | Yang, Ming-Jun,Pang, Xue-Qin,Zhang, Xin,&Han, Ke-Li.(2011).Molecular dynamics simulation reveals preorganization of the chloroplast FtsY towards complex formation induced by GTP binding.journal of structural biology,173(1),57-66. |
| MLA | Yang, Ming-Jun,et al."Molecular dynamics simulation reveals preorganization of the chloroplast FtsY towards complex formation induced by GTP binding".journal of structural biology 173.1(2011):57-66. |
入库方式： OAI收割
来源：大连化学物理研究所
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