检索结果-南通市图书馆

Molecular Mechanism of the Specificity of Protein import into Chloroplasts and Mitochondria in Plant Cells

Molecular Plant 2019年第7期12卷 951-966页

作者： Dong Wook Lee Sumin Lee Junho Lee Seungjin Woo Md.Abdur Razzak Alessandro Vitale Inhwan Hwang Division of Integrative Biosciences and Biotechnology Pohang University of Science and Technology Pohang 37673 Korea Department of Life Sciences Pohang University of Science and Technology Pohang 37673 Korea Istituto di Biologia e Biotecnologia Agraria Consiglio Nazionale Delle Ricerche Milano Italy

Plants possess both types of endosymbiotic organelles, chloroplasts and mitochondria. Transit peptides and presequences function as signal sequences for specific import into chloroplasts and mitochondria, respectively. However, how these highly similar signal sequences confer the protein import specificity remains elusive. Here, we show that mitochondrial- or chloroplast-specific import involves two distinct steps, specificity determination and translocation across envelopes, which are mediated by the N-terminal regions and functionally interchangeable C-terminal regions, respectively, of transit peptides and presequences. A domain harboring multiple-arginine and hydrophobic sequence motifs in the N-terminal regions of presequences was identified as the mitochondrial specificity factor. The presence of this domain and the absence of arginine residues in the N-terminal regions of otherwise common targeting signals confers specificity of protein import into mitochondria and chloroplasts, respectively. AtToc159, a chloroplast import receptor, also contributes to determining chloroplast import specificity. We propose that common ancestral sequences were functionalized into mitochondrial- and chloroplast-specific signal sequences by the presence and absence, respectively, of multiple-arginine and hydrophobic sequence motifs in the N-terminal region.

关键词： transit peptide presequence protein import into chloroplasts and mitochondria N-terminal specificity domain C-terminal common translocation domain import specificity determination

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Storm Blows into China International import Expo

引用

China's Foreign Trade 2023年第6期 38-40页

作者： Liu Xinwei 不详

The 6th China International import Expo (hereinafter referred to as the CIIE) took place as scheduled.In past CIIEs,the intelligent industry and information technology hall has always been one of the most popular exhibition areas because of its highly scientific and technological content.This year’s CIIE was fully resumed offline,and the intelligent industry and information technology hall once again gathered more cutting-edge technologies and high-end equipment,focusing on the latest achievements in green,low-carbon and digital intelligence in the industry.

关键词： resume Storm import

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Explore the China International import Expo to Experience Traditional New Life in the‘Shanghai Intangible Cultural Heritage Hall'

引用

China & The World Cultural Exchange 2023年第11期 39-42页

作者： Li Ting 不详

Since the first China International import Expo(CIE),the"Shanghai Intangible Cultural Heritage Hall"has opened its doors to visitors every year in the news center,showcasing the charm of Shanghai intangible cultural heritage to friends from around the world in a scenario-based and lifelike manner.It has become a unique window for promoting outstanding Chinese traditional culture and displaying the unique culture of Shanghai and Jiangnan.

关键词： culture import heritage

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

On the Impact of Precursor Unfolding during Protein import into Chloroplasts

引用

Molecular Plant 2010年第3期3卷 499-508页

作者： Maike Ruprecht Tihana Bionda Takehiro Sato Maik S. Sommer Toshiya Endo Enrico Schleiff Goethe University Cluster of Excellence Macromolecular Complexes Centre of Membrane Proteomics Department of Biosciences Molecular Cell Biology of Plants Max-von-Laue Str. 9 D-60438 Frankfurt Germany Department of Chemistry Graduate School of Science and Institute for Advanced Research Nagoya University Chikusa-ku Nagoya 464-8602 Japan Present address: Department of Molecular and Cellular Medicine Texas A&M University System Health Science Center College Station TX 77843-11114 USA

Protein translocation across membranes is a fundamental cellular process. The majority of the proteins of organelles such as mitochondria and chloroplasts is synthesized in the cytosol and subsequently imported in a posttranslational manner. The precursor proteins have to be unfolded at least for translocation, but it has also been assumed that they are unfolded during transport to the organelle in the cytosol. Unfolding is governed by chaperones and the translocon itself. At the same time, chaperones provide the energy for the import process. The energetic properties of the chloroplast translocon were studied by import of the Ig-like module of the muscle protein titin fused to the transit peptide of the chloroplast targeted oxygen evolving complex subunit of 33 kDa （OE33）. Our results suggest that p（OE33）titin is folded prior to import and that translocation is initiated by unfolding after having bound to the translocon at the chloroplast surface. Using a set of stabilizing and destabilizing mutants of titin previously analyzed by atomic force microscopy and as passenger for mitochondrial translocation, we studied the unfolding force provided by the chloroplast translocon. Based on these results, a model for translocation is discussed.

关键词： Chloroplasts import precursor protein titin energetic of translocation.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

In vivo Studies on the Roles of Tic55-Related Proteins in Chloroplast Protein import in Arabidopsis thaliana

引用

Molecular Plant 2009年第6期2卷 1397-1409页

作者： Patrik Boij Ramesh Patel Christel Garcia Paul Jarvis Henrik Aronsson Department of Plant and Environmental Sciences University of Gothenburg Box 461 SE-405 30 Gothenburg Sweden Department of Biology University of Leicester University Road Leicester LE1 7RH UK

The TicS5 （Translocon at the inner envelope membrane of chloroplasts, 55 kDa） protein was identified in pea as a putative regulator, possibly linking chloroplast protein import to the redox state of the photosynthetic machinery. Two Tic55 homologs have been proposed to exist in Arabidopsis： atTic55-11 and AtPTC52 （Protochlorophyllide-dependent Trans- Iocon Component, 52 kDa; has also been called atTic55-1V）. Our phylogenetic analysis shows that attic55-11 is an ortholog of psTic55 from pea （Pisum sativurn）, and that AtPTC52 is a more distant homolog of the two. AtPTC52 was included in this study to rule out possible functional links between the proteins in Arabidopsis. No detectable mutant phenotypes were found in two independent T-DNA knockout mutant plant lines for each Arabidopsis protein, when compared with wild- type： visible appearance, chlorophyll content, photosynthetic performance, and chloroplast protein import, for example, were all normal. Both wild-type and tic55-11 mutant chloroplasts exhibited deficient protein import when treated with diethylpyrocarbonate, indicating that Tic55 is not the sole target of this reagent in relation to protein import. Furthermore, ptc52 mutant chloroplasts were not defective with respect to pPORA import, which was previously reported to involve PTC52 in barley. Thus, we conclude that atTic55-11 and AtPTC52 are not strictly required for functional protein import in Arabidopsis.

关键词： Arabidopsis chloroplast import protein targeting Tic55.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Extraordinary Decade of China's import Market——Report on Chinese imports 2022 Officially Released

引用

China's Foreign Trade 2022年第6期 12-13页

作者： Wei Hao Business School Beijing Normal University National import Research Center

Recently,the Report on Chinese imports 2022 was officially released,which stated that China has steadily held the position of the second largest importer in the world thanks to the dramatical development of China’s import trade in the last decade.The China International import Expo (CIIE) fully demonstrates the broadness and the great potential of China’s import market,stimulating participating countries to export more to China.In addition to the United States,Japan,Germany and other developed countries,more countries along the Belt and Road,central and eastern European countries,and the least developed countries now actively participate in the CIIE to exhibit their featured prime exports.

关键词： Market ordinary import

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

2021 Report on the Development of China's import Released:China Is Contributing Greatly to Increases in Global imports

引用

China's Foreign Trade 2021年第6期 31-33页

作者： Wei Hao the Business School of Beijing Normal University National import Research Center of Beijing Normal University

Recently,2021 Report on the Development of China's import(the Report)was officially issued.As the first comprehensive report on import trade in China,the report serves the major national strategy of actively expanding imports and the event of China International import Expo(CIIE).Since 2018,this annual report has been issued four times in line.The Report is jointly developed by the Business School and China Institute of Education and Social Development of Beijing Normal University.

关键词： jointly import Release

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A SENSE OF CERTAINTY import expo shores up global business confidence in China

引用

China Report ASEAN 2020年第11期5卷 44-47页

作者： Yuan Yuan 不详

Four nucleic acid tests,14 days of quarantine with daily reports on body temperature,and another 14 days of isolation in future.This is part of what Roy van den Hurk had to go through to attend the Third China International import Expo(CIIE)in Shanghai this month.Van den Hurk,Product General Manager of Milk New Zealand,one of the largest dairy farm groups in New Zealand,and an“old friend”of the CIIE,received an invitation on October 12 to attend the expo.He took a nucleic acid test,intending to depart on October 18.But he couldn’t get an air ticket and had to postpone the departure to October 21.Since the test result was valid for only one week,he had to take another test.

关键词： import shore Zealand

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

港口效率、贸易自由化与中国进口的交易规模分布

引用

国际贸易研究 2018年第8期 35-54页

作者：逯建李羿萱

港口效率的提升和贸易自由化会对交易规模的分布产生怎样的影响？文章使用理论模型和《中国港口统计年鉴》、中国海关数据库等数据，研究了这一问题。研究结果表明：港口效率的提高促使我国进口的交易规模更加平稳的分布，更加有利于小... 详细信息

港口效率的提升和贸易自由化会对交易规模的分布产生怎样的影响？文章使用理论模型和《中国港口统计年鉴》、中国海关数据库等数据，研究了这一问题。研究结果表明：港口效率的提高促使我国进口的交易规模更加平稳的分布，更加有利于小额化贸易发展；在控制其他因素之后，贸易自由化带来的进口关税税率的降低能够促使中国进口的交易规模分布更加集中，更加有利于较大规模进口交易的集中。这一结论在基于省份、行业、进口商品技术性和差异性层面数据中和引入控制变量、替换港口效率值后仍然稳健。

关键词：港口效率贸易自由化进口交易规模分布　　port efficiency trade liberalization import transaction size distribution

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

学校读者我要写书评

暂无评论

Impact of Sino-US Trade Friction on import and Export Trade Pattern of Soybean in Heilongjiang

引用

Asian Agricultural Research 2019年第3期11卷 1-3,10页

作者： Junde HAN Junjie SONG Tianzhen QI College of Economics and Management Tianjin Agricultural University

Under the background of Sino-US trade friction,soybean,as an important variety in the important and export trade of agricultural products,has become a key bargaining chip. After the Ministry of Commerce of China announced the counter list of agricultural products including soybean,the price fluctuations of domestic soybean and related agricultural products are rapidly expanding. Under the background of SinoUS trade friction,taking the soybean-producing areas in Heilongjiang as an example,the impact of Sino-US trade friction on the important and export pattern of soybean in Heilongjiang was explored to provide a certain theoretical basis for the development of soybean industry in Heilongjiang.

关键词： Sino-US trade friction Soybean import and export Trade pattern

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：