蛋白质组学技术筛选与鉴定鲤鱼嗅脑急性创伤后的应激蛋白质

优化建立鲤鱼(cyprinus carpio,CC)嗅觉端脑(嗅脑)全蛋白提取技术。联用低渗透裂解和液氮冻溶法破碎鲤鱼嗅脑组织(rhinencephalon tissue of cyprinus carpio,CCRT)、低速离心提取CCRT全蛋白,并采用双向凝胶电泳(2D-PAGE)技术进行有效分离。经分析与统计,每张CCRT的2D-PAGE图谱中的蛋白质斑点数目约为1200个。分别分离CCRT的脂溶性和水溶性全蛋白,并获得高分辨率的2D-PAGE图谱。选用差异蛋白质组学技术筛选经10%冰醋酸创伤后的CC,其端脑组织所表达出的6种应激蛋白质,并用肽质量指纹谱(peptide mass fingerprinting,PMF)和数据库检索技术给予鉴定。其中3种蛋白质为70S热休克蛋白、β微管蛋白和DNA链接酶IV,有望作为研究大脑急性创伤后的应激修复途径和机理的指示蛋白质

质谱技术研究海兔大脑神经节超微量多肽内切酶和酸性多肽酶解产物

采用ESI-Q-TOF质谱分析了由27个氨基酸残基组成的酸性多肽(AP)的一级结构。选用RP-HPLC和MALDI-TOF质谱非在线技术分离与鉴定海兔大脑神经节(CG)多肽与蛋白质的组成与分布,发现CG中含有AP酶解的二聚体短肽。这些短肽序列分别为2(NKDEEQRELLKAISNLL)、2(NKDEEQRELLKAISNL)、2(SGVSLLTSNKDEEQREL)和2(LTSNKDEEQRE LL),均以L—R(氨基酸残基)方式断裂。以AP为探针,结合MALDI-TOF质谱分析技术,发现CG中含有超微量的L—R多肽内切酶,其分子量为78218·25Da。本研究中的分析方法也适合于研究其他生物体内超微量多肽及多肽酶分布与功能

Research Progress on Transition State of Organic Electrode Materials

有机电极材料具有理论比容量大、结构可设计性强、加工使用过程环境友好等优点被广泛应用于二次电池的研究中。有机电极材料在氧化还原过程会产生具有不成对电子的自由基中间体,自由基中间体的稳定程度影响电极材料的电化学性能。通过改变材料的结构可以调控自由基中间体的稳定性,从而优化有机电极材料的电化学性能。本文对有机电极材料在电化学过程中产生的自由基中间体进行了分类介绍,阐明了材料结构、自由基中间体稳定性和电化学性能之间的关系。With the increasing requirements for high energy density, long lifetime, high safety, environmentally friendly fabrication, and sustainable development of large energy storage devices, the society calls for new electrode materials in rechargeable batteries beyond traditional inorganic materials which are limited by specific capacity. Organic electrode materials have been widely used in rechargeable batteries due to their advantages of large theoretical capacity, designable structures and environmentally friendly fabrications. In this review, the radical intermediates of organic electrode materials produced in the charging-discharging process (redox reaction) and their types are systematically reviewed. The stability of radical intermediates controlled by changing the structure of materials, and thereby, the optimization in the electrochemical performance of organic electrode materials are described. The reasons for the optimization of electrochemical performance are analyzed in depth, and the mechanism is discussed. This review provides guidance for improving the electrochemical performance of secondary batteries with organic materials as electrodes in the future.国家自然科学基金(21875206);国家自然科学基金(21403187);国家自然科学基金(21875097);河北省自然科学基金(B2019203487);深圳市科技创新委员会基础研究(JCYJ20170412153139454)通讯作者:卢周广,黄苇苇E-mail:[email protected];[email protected]:Zhou-GuangLu,Wei-WeiHuangE-mail:[email protected];[email protected].燕山大学亚稳材料制备技术与科学国家重点实验室,河北 秦皇岛 0660042.南方科技大学材料科学与工程系,广东 深圳 5180553.燕山大学环境与化学工程学院,河北 秦皇岛 0660041. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China2. Department of Materials Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China3. School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, Chin

MALDI-TOF质谱技术研究海兔卵产卵激素及其分解产物的特性

采用萃取法和反相HPLC技术分离蓝斑背肛海兔(Notarcus leachii cirrosusStimpson,NLCS)卵内的产卵激素(egg laying hormone,ELH)及其分解产物.选用基质辅助激光解吸离子化飞行时间(Matrix-assisted laser deposition/ioni-zation time-of-flight,MALDI)质谱技术研究NLCS卵内的ELH、ELH分解产物和酸性多肽(acidic peptide,AP)二聚体的组成与结构特性.实验结果表明,NLCS卵不仅含有丰富的ELH及其分解产物,而且它的AP及其分解产物主要呈二聚体状态,推测这种二聚体结构对今后阐明ELH和AP的生理功能和调控机理起着重要的作用

优化分离与鉴定蓝斑背肛海兔口腔神经节蛋白质组

采用双向凝胶电泳技术优化分离蓝斑背肛海兔(Notarcus leachii cirrosusStimpson,NLCS)口腔神经节(Buccal Ganglion,BG)蛋白质组,并获得约300个蛋白质斑点.用组合基质辅助激光解吸电离化飞行时间(MALD I-TOF)质谱技术和胶内酶解技术测定BG蛋白质组中的96个蛋白质斑点的肽指纹(Peptide m ass fin-gerprint,PMF)图谱.经数据库检索与比对后,发现96种蛋白质中仅有4种蛋白质可获得较高的匹配率,它们分别是微管蛋白(Tubu lin)、肌动蛋白(Actin)和两个1,5-二磷酸核酮糖-羧化酶/加氧酶(R ibu lose-1,5-b i-sphosphate carboxylase/oxygenase,R ibu lose),均属于神经细胞骨架蛋白质;同时还发现一种交配信号肽前体(Peptide m ating pheromone precursor).利用LOC trees软件和分类法对56种蛋白质进行亚细胞定位与分类

基质辅助激光解吸电离飞行时间质谱技术研究人血清转铁蛋白稳定性及裂解产物

制备质谱纯人血清转铁蛋白(HTF),供分子结构分析。选用SDS-PAGE、胶外酶解、基质辅助激光解吸/电离质谱技术(MALDI-TOF)、数据库检索和比对技术鉴定铁饱和HTF、双铁HTF(HTF-2Fe3+)、单铁HTF(HTF-Fe3+)和脱铁HTF(apoHTF)的稳定性和裂解产物。以乙腈溶液作为洗脱相,发现铁饱和HTF在RP-HPLC分离纯化过程中产生裂解现象。铁饱和HTF和HTF-2Fe3+经乙腈处理后均能产生不同分子量的短肽裂解产物,指出HTF结构稳定性与络合铁离子数量有关。铁组分改善了HTF分子结构的稳定性。采用比对法,研究在乙腈作用下HTF裂解成为各种各样短肽的规律,初步阐明其裂解机理。在乙腈作用下,HTF可能通过蛋白质去折叠途径,形成不同多聚态HTF或多肽裂解产物。推测目前用于临床诊断先天性糖基化紊乱(CDG)和慢性酒精滥用(CAA)疾病低准确率的起因可能是受HTF裂解产物或多聚体的干扰

Synthesis of a new compound containing sulfur atoms and study of crystal structures

联系人简介:邓顺柳(1975),女,副教授,主要从事原子簇化学的研究.[中文文摘]通过简单的一步亲核取代反应合成了一新型含硫化合物(4-羧基甲硫醇基-2,3,5,6-四氯-苯硫醇基)乙酸(1),产物经乙酸乙酯重结晶分离纯化,并在适当的条件下培养得到单晶,测定了该化合物的晶体结构,以及其DMSO加合物的晶体结构.其中该化合物晶体属于单斜晶系,空间群为P21/c,a=0.508 93(4)nm,b=0.969 81(7)nm,c=1.439 1(1)nm,β=91.036(4)°,V=0.710 20(9)nm3,Z=2,Dc=1.843 g/cm3,F(000)=392,μ=1.133,R1[I>2σ(I)]=0.097 3,wR2[I>2σ(I)]=0.193 1.其DMSO加合物的晶体结构属于正交晶系,空间群为Pnma,a=1.372 48(2)nm,b=2.883 6(4)nm,c=0.461 48(6)nm,V=1.826 4(4)nm3,Z=4,Dc=1.703 g/cm3,F(000)=936,μ=1.010,R1[I>2σ(I)]=0.088 8,wR2[I>2σ(I)]=0.203 9.晶体结构分析表明,分子间氢键是这一化合物的一大特点.[英文文摘]A new compound containing sulfur atoms(4-carboxymethylsulfanyl-2,3,5,6-tetrachloro-phenylsulfanyl)-acetic acid(1) was synthesized via a simple one-pot nucleophilic substitution reaction.The product was separated and purified by recrystallization from acetic acid ethyl ester.Crystals suitable for crystallography and its DMSO complexes were obtained with slow evaporation of appropriate solvent.The crystal structure of the title compound belongs to monoclinic system with space group P21/c,a=0.508 93(4) nm,b= 0.969 81(7) nm,c= 1.439 1(1)nm,β=91.036(4)0,V=0.710 20 (9)nm3,Z=2,Dc=1.843 g/cm3, F(000)=392,μ= 1.133,R1[I>2σ(I)]=0.097 3,wR2[I>2σ(I)]= 0.193 1.The crystal of its DMSO complex belongs to orthorhombic system with space group Pnma,a=1.372 48(2)nm,b=2.883 6(4)nm,c= 0.461 48(6)nm,V= 1.826 4(4)nm3,Z= 4,Dc= 1.703 g/cm3,F(000)=936,μ= 1.010,R1[I>2σ (I)]=0.088 8,wR2[I>2σ(I)]=0.203 9.The crystal structure analysis shows that this compound exhibits intermolecular hydrogen bonds.福建省自然科学基金资助项目(2009J05034);国家自然科学基金资助项目(20601022

微囊藻毒素对Hela细胞和Vero细胞的毒性效应

ＭＣＹＳＴ－ＬＲ，ＭＣＹＳＴ－ＲＲ，ＭＣＹＳＴ－ＹＲ稀释后的毒素溶液处理Ｈｅｌａ细胞和Ｖｅｒｏ细胞后得到如下结果：１．３种毒素溶液对培养的Ｈｅｌａ细胞均有明显的抑制作用和毒性作用，其毒性作用与浓度成正比．致死细胞边缘不整齐不规则，细胞呈脱水状态．倒置显微镜下可见细胞变黑无折光性．高浓度毒素溶液（包括ＭＣＹＳＴ－ＬＲ，－ＲＲ和－ＹＲ３个样品）作用细胞２４ｈ后，细胞完全致死脱落，３个样品间无明显差别；２．毒素对Ｖｅｒｏ细胞也具一定的抑制和毒性作用，但不如对Ｈｅｌａ细胞的作用强烈；３．在相同稀释浓度下，ＭＣＹ

微囊藻毒素对Hela细胞和Vero细胞的毒性效应

ＭＣＹＳＴ－ＬＲ，ＭＣＹＳＴ－ＲＲ，ＭＣＹＳＴ－ＹＲ稀释后的毒素溶液处理Ｈｅｌａ细胞和Ｖｅｒｏ细胞后得到如下结果：１．３种毒素溶液对培养的Ｈｅｌａ细胞均有明显的抑制作用和毒性作用，其毒性作用与浓度成正比，致死细胞边缘不整齐不规则，细胞呈脱水状态。倒置显微镜下可见细胞变黑无折光性。高浓度毒素溶液（包括ＭＣＹＳＴ－ＬＲ，ＲＲ和ＹＲ３个样品）作用细胞２４ｈ后，细胞完全致死脱落，３个样品间无明显差别；２

Study of exceed micro-endopeptidease and enzymolysis produces of acidic peptide from the Aplysia cerebral ganglion by mass spectrometry

Acidic peptide (AP) consisting of 27 residues of amino acids was synthesized by the peptide synthetic instrument, and its primary structure was further analyzed with electrospray ionization-Q-time of flight (ESI-Q-TOF) mass spectrometer. The composition and distribution of the peptides and proteome in Aplysia cerebral ganglion were separated and identified by a combined off-line technology of reversed phase-high performance liquid chromatography (RP-HPLC) and matrix-assisted laser desorption ionization (MALDI)-TOF mass spectrometry, respectively. A lot of enzymolysis produces of AP in cerebral ganglion(CG) were found, which showed a dipolymer molecular structure. It was noticed that the primary structure of these peptides were found to share a similar dipolymer structures with 2(NKDEEQRELLKAISNLL) 2 (NKDEEQRELLKAISNL), 2(SGVSLLTSNKDEEQREL), and 2(LTSNKDEEQRELL) and to have same L-R(amino acids) residues of bound split. Using a combined method of AP as an probe and MALDI-TOF mass spectrometry as a analytical technology, it was found that there was the exceed micro-endopeptidease for enzymolysis L-R bound of AP in CG, indicating that its molecular weight was 78218.25 Da. In addition, the analytical method described here is also fit for finding composition and distribution of the exceed micro-peptide and endo-peptidease in various organisms