Name: lerlic-ms/ms for in-depth characterization and quantification of glutamine and asparagine deamidation in shotgun proteomics
Uploaded: 2017-04-09T15:00:00
Description: Watch this Scientific Journal Video about LERLIC-MS/MS for In-depth Characterization and Quantification of Glutamine and Asparagine Deamidation in Shotgun Proteomics at JoVE.com

，新加坡（-OF-NMRC IRG-0003-2016），和NTU-NHG老化研究资助的国家医学研究理事会（：这项工作是在部分地由教育的新加坡教育部（授予ARC9 / 15级2）资助项目格兰特ARG / 14017）。我们想表达我们的感谢和最诚挚的感谢安德鲁·阿尔珀特博士和PolyLC团队亲切与成为可能这项研究包装材料提供给我们。

1.包装长的长度阴离子交换（LAX）毛细管柱 （注意：虽然LAX列可以在家里装，因为我们在这个协议描述，LAX列也可购得，见材料与试剂的表的其他细节）。 <ol><li>暂停50毫克弱阴离子交换包装材料的在3.5mL的包装缓冲器 （ 表1）以制备淤浆。 </li><li>组装该毛细管柱（50厘米长 - 200微米内径（ID）管）的端部使用一个母对阴配合，一个套圈和阴?...

<ol>
	<li>Hao, P., Adav, S. S., Gallart-Palau, X., Sze, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recent+advances+in+mass+spectrometric+analysis+of+protein+deamidation.">Recent advances in mass spectrometric analysis of protein deamidation.</a> Mass Spectrom Rev. , (2016).</li><li>Geiger, T., Clarke, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Deamidation,+isomerization,+and+racemization+at+asparaginyl+and+aspartyl+residues+in+peptides.+Succinimide-linked+reactions+that+contribute+to+protein+degradation.">Deamidation, isomerization, and racemization at asparaginyl and aspartyl residues in peptides. Succinimide-linked reactions that contribute to protein degradation.</a> J Biol Chem. 262 (2), 785-794 (1987).</li><li>Serra, A., Gallart-Palau, X., Wei, J., Sze, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Characterization+of+Glutamine+Deamidation+by+Long-Length+Electrostatic+Repulsion-Hydrophilic+Interaction+Chromatography-Tandem+Mass+Spectrometry+(LERLIC-MS/MS)+in+Shotgun+Proteomics.">Characterization of Glutamine Deamidation by Long-Length Electrostatic Repulsion-Hydrophilic Interaction Chromatography-Tandem Mass Spectrometry (LERLIC-MS/MS) in Shotgun Proteomics.</a> Anal Chem. , (2016).</li><li>Reissner, K. J., Aswad, D. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Deamidation+and+isoaspartate+formation+in+proteins:+unwanted+alterations+or+surreptitious+signals.">Deamidation and isoaspartate formation in proteins: unwanted alterations or surreptitious signals.</a> Cell Mol Life Sci. 60 (7), 1281-1295 (2003).</li><li>Capasso, S., Mazzarella, L., Sica, F., Zagari, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=First+evidence+of+spontaneous+deamidation+of+glutamine+residue+via+cyclic+imide+to+[small+alpha]-+and+[gamma]-glutamic+residue+under+physiological+conditions.">First evidence of spontaneous deamidation of glutamine residue via cyclic imide to [small alpha]- and [gamma]-glutamic residue under physiological conditions.</a> JChem Soc, Chem Commun. (23), 1667-1668 (1991).</li><li>Gallart-Palau, X., Serra, A., Sze, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Enrichment+of+extracellular+vesicles+from+tissues+of+the+central+nervous+system+by+PROSPR.">Enrichment of extracellular vesicles from tissues of the central nervous system by PROSPR.</a> Mol Neurodegener. 11 (1), 41 (2016).</li><li>Gallart-Palau, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gender+differences+in+white+matter+pathology+and+mitochondrial+dysfunction+in+Alzheimer's+disease+with+cerebrovascular+disease.">Gender differences in white matter pathology and mitochondrial dysfunction in Alzheimer's disease with cerebrovascular disease.</a> Mol Brain. 9, 27 (2016).</li><li>Gallart-Palau, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Temporal+lobe+proteins+implicated+in+synaptic+failure+exhibit+differential+expression+and+deamidation+in+vascular+dementia.">Temporal lobe proteins implicated in synaptic failure exhibit differential expression and deamidation in vascular dementia.</a> Neurochem Int. 80, 87-98 (2015).</li><li>Robinson, N. E., Robinson, A. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Molecular+clocks.">Molecular clocks.</a> Proc Natl Acad Sci U.S.A. 98 (3), 944-949 (2001).</li><li>Hao, P., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Enhanced+separation+and+characterization+of+deamidated+peptides+with+RP-ERLIC-based+multidimensional+chromatography+coupled+with+tandem+mass+spectrometry.">Enhanced separation and characterization of deamidated peptides with RP-ERLIC-based multidimensional chromatography coupled with tandem mass spectrometry.</a> J Proteome Res. 11 (3), 1804-1811 (2012).</li><li>Li, X., Lin, C., O'Connor, P. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Glutamine+deamidation:+differentiation+of+glutamic+acid+and+gamma-glutamic+acid+in+peptides+by+electron+capture+dissociation.">Glutamine deamidation: differentiation of glutamic acid and gamma-glutamic acid in peptides by electron capture dissociation.</a> Anal Chem. 82 (9), 3606-3615 (2010).</li><li>Smith, P. K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Measurement+of+protein+using+bicinchoninic+acid.">Measurement of protein using bicinchoninic acid.</a> Anal Biochem. 150 (1), 76-85 (1985).</li><li>Serra, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Plasma+proteome+coverage+is+increased+by+unique+peptide+recovery+from+sodium+deoxycholate+precipitate.">Plasma proteome coverage is increased by unique peptide recovery from sodium deoxycholate precipitate.</a> Anal Bioanal Chem. , 1-11 (2016).</li><li>Gallart-Palau, X., Serra, A., Sze, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Uncovering+Neurodegenerative+Protein+Modifications+via+Proteomic+Profiling.">Uncovering Neurodegenerative Protein Modifications via Proteomic Profiling.</a> Int Rev Neurobiol. 121, 87-116 (2015).</li><li>Liu, Y. D., van Enk, J. Z., Flynn, G. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+antibody+Fc+deamidation+in+vivo.">Human antibody Fc deamidation in vivo.</a> Biologicals. 37 (5), 313-322 (2009).</li><li>Serra, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Commercial+processed+soy-based+food+product+contains+glycated+and+glycoxidated+lunasin+proteoforms.">Commercial processed soy-based food product contains glycated and glycoxidated lunasin proteoforms.</a> Sci Rep. 6, 26106 (2016).</li><li>Serra, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+high-throughput+peptidomic+strategy+to+decipher+the+molecular+diversity+of+cyclic+cysteine-rich+peptides.">A high-throughput peptidomic strategy to decipher the molecular diversity of cyclic cysteine-rich peptides.</a> Sci Rep. 6, 23005 (2016).</li><li>Leo, G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Deamidation+at+asparagine+and+glutamine+as+a+major+modification+upon+deterioration/aging+of+proteinaceous+binders+in+mural+paintings.">Deamidation at asparagine and glutamine as a major modification upon deterioration/aging of proteinaceous binders in mural paintings.</a> Anal Chem. 83 (6), 2056-2064 (2011).</li><li>Wilson, J., van Doorn, N. L., Collins, M. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Assessing+the+extent+of+bone+degradation+using+glutamine+deamidation+in+collagen.">Assessing the extent of bone degradation using glutamine deamidation in collagen.</a> Anal Chem. 84 (21), 9041-9048 (2012).</li><li>Buszewski, B., Noga, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hydrophilic+interaction+liquid+chromatography+(HILIC)--a+powerful+separation+technique.">Hydrophilic interaction liquid chromatography (HILIC)--a powerful separation technique.</a> Anal Bioanal Chem. 402 (1), 231-247 (2012).</li><li>Alpert, A. J., Hudecz, O., Mechtler, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Anion-exchange+chromatography+of+phosphopeptides:+weak+anion+exchange+versus+strong+anion+exchange+and+anion-exchange+chromatography+versus+electrostatic+repulsion-hydrophilic+interaction+chromatography.">Anion-exchange chromatography of phosphopeptides: weak anion exchange versus strong anion exchange and anion-exchange chromatography versus electrostatic repulsion-hydrophilic interaction chromatography.</a> Anal Chem. 87 (9), 4704-4711 (2015).</li><li>Adav, S. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dementia-linked+amyloidosis+is+associated+with+brain+protein+deamidation+as+revealed+by+proteomic+profiling+of+human+brain+tissues.">Dementia-linked amyloidosis is associated with brain protein deamidation as revealed by proteomic profiling of human brain tissues.</a> Mol Brain. 9 (1), 20 (2016).</li><li>Golde, T. E., Borchelt, D. R., Giasson, B. I., Lewis, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Thinking+laterally+about+neurodegenerative+proteinopathies.">Thinking laterally about neurodegenerative proteinopathies.</a> J Clin Invest. 123 (5), 1847-1855 (2013).</li><li>Gallart-Palau, X., Ng, C. H., Ribera, J., Sze, S. K., Lim, K. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Drosophila+expressing+human+SOD1+successfully+recapitulates+mitochondrial+phenotypic+features+of+familial+amyotrophic+lateral+sclerosis.">Drosophila expressing human SOD1 successfully recapitulates mitochondrial phenotypic features of familial amyotrophic lateral sclerosis.</a> Neurosci Lett. 624, 47-52 (2016).</li><li>Ouellette, D., Chumsae, C., Clabbers, A., Radziejewski, C., Correia, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comparison+of+the+in+vitro+and+in+vivo+stability+of+a+succinimide+intermediate+observed+on+a+therapeutic+IgG1+molecule.">Comparison of the in vitro and in vivo stability of a succinimide intermediate observed on a therapeutic IgG1 molecule.</a> mAbs. 5 (3), 432-444 (2013).</li><li>Kumar, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Unexpected+functional+implication+of+a+stable+succinimide+in+the+structural+stability+of+Methanocaldococcus+jannaschii+glutaminase.">Unexpected functional implication of a stable succinimide in the structural stability of Methanocaldococcus jannaschii glutaminase.</a> Nat Commun. 7, 12798 (2016).</li><li>Alpert, A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Electrostatic+Repulsion+Hydrophilic+Interaction+Chromatography+for+Isocratic+Separation+of+Charged+Solutes+and+Selective+Isolation+of+Phosphopeptides.">Electrostatic Repulsion Hydrophilic Interaction Chromatography for Isocratic Separation of Charged Solutes and Selective Isolation of Phosphopeptides.</a> Anal Chem. 80 (1), 62-76 (2008).</li><li>Hao, P., Ren, Y., Alpert, A. J., Sze, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Detection,+Evaluation+and+Minimization+of+Nonenzymatic+Deamidation+in+Proteomic+Sample+Preparation.">Detection, Evaluation and Minimization of Nonenzymatic Deamidation in Proteomic Sample Preparation.</a> Mol Cell Proteomics. 10 (10), 111 (2011).</li><li>Hao, P., Ren, Y., Datta, A., Tam, J. P., Sze, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Evaluation+of+the+effect+of+trypsin+digestion+buffers+on+artificial+deamidation.">Evaluation of the effect of trypsin digestion buffers on artificial deamidation.</a> J Proteome Res. 14 (2), 1308-1314 (2015).</li><li>Liu, S., Moulton, K. R., Auclair, J. R., Zhou, Z. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mildly+acidic+conditions+eliminate+deamidation+artifact+during+proteolysis:+digestion+with+endoprotease+Glu-C+at+pH+4.5.">Mildly acidic conditions eliminate deamidation artifact during proteolysis: digestion with endoprotease Glu-C at pH 4.5.</a> Amino Acids. 48 (4), 1059-1067 (2016).</li></ol>

在该视频文章，我们提出LERLIC-MS / MS 3的步骤一步协议，一种方法来进行深入的表征和准确地确定蛋白质脱酰胺和涉及在此蛋白质修饰的酶过程的程度。 LERLIC-MS / MS是基于静电排斥亲水性相互作用色谱（ERLIC）27的原则下使用的长长度（50厘米）的LAX。使用长长度列，如在我们的研究3中所示，根据它们的等电点27 ERLIC的电位最大...

脱酰胺是一种蛋白质翻译后修饰（PTM），通过天冬酰胺（ASN）和/或谷氨酰胺（Gln）残基1的变形例引入了一个负电荷的蛋白质骨架。 1比2：此修改而影响的Asn残基处的共同3生成异构产物异天冬氨酸（异Asp）和正 -天冬氨酸（ASP）。尽管如此，该比率可以通过修复酶L-isoaspartyl甲基（PIMT）3，4的干预而改变。类似地，谷氨酰胺残基的脱酰胺化，生成以预期1异构γ-谷氨酸（γ-Glu），并且的α-谷氨酸亚型（α-GLU）：7的比例3,5，但此比例可通过的作用而移普遍存在的酶的转谷氨酰胺酶2和其它转谷氨酰胺酶，转谷氨酰胺酶包括1，一个电子nzyme最近被确定为与大脑中的6外囊泡。 脱酰胺的起源可以是自发的或酶促的，前者是特别常见的谷氨酰胺残基，其中的转谷氨酰胺酶和其它酶通过转酰氨调解帧间/分子内交联（参见第3对谷氨酰胺酰氨进一步细节及其含义在几种慢性和致命人类疾病）。因此，脱酰胺是具有在所述结构上的一个关键反响和功能的影响分子4，7，8，并且需要进行了深入的化学表征3中的其不同的生物化学后果的光包括其服务老化9的作为分子时钟PTM 。 虽然天冬酰胺残留的脱酰胺已<html>相对充分表征通过自下而上鸟枪蛋白质组学1,10，谷氨酰胺残基的脱酰胺化仍然没有超出由基于电子的自由基碎片11模型化合物的具有挑战性的分析的合适表征方法。我们最近开发了一种新型一维鸟枪蛋白质组学策略（LERLIC-MS / MS）3，使在一次分析中从复杂生物样品和模型化合物谷氨酰胺和天冬酰胺脱酰胺同种型的分离。 LERLIC-MS / MS是基于使用的长长度（50厘米）离子交换柱（LAX）上静电排斥亲水性相互作用色谱（ERLIC）模式下工作的胰蛋白酶消化的肽的分离和耦合到串联质谱（LC- MS / MS）。这个新的分析策略已被用于表征和比较定量每个脱酰胺化残基在人脑组织中的程度F“&gt; 3。然而，这里概述的协议将提供旨在研究蛋白质脱酰胺的特殊性在感兴趣的生化上下文LERLIC-MS / MS的视频成像。 道德守则 本协议的所有程序已通过在新加坡南洋理工大学的机构审查委员会，并根据该机构准则已执行。

<table border="0" cellpadding="0" cellspacing="0" width="1053">
	<colgroup>
		<col />
		<col />
		<col />
		<col />
	</colgroup>
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">PolyCAT 3&#181;m 100-&#197; (bulk material)</td>
			<td style="width:424px;">PolyLC Inc.</td>
			<td style="width:207px;">Special order</td>
			<td style="width:64px;"></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:359px;">Long-length ion exchange capillary column 50 cm - 200 &#181;m ID</td>
			<td style="width:424px;">PolyLC Inc.</td>
			<td style="width:207px;">Special order</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">PEEKsil Tubing 1/16&#34; OD x 200 &#181;m ID x 50 cm length</td>
			<td>SGE Analytical Science under Trajan Scientific Australia&#160;</td>
			<td style="width:207px;">620050</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Female-to-female fitting for 1/16&#34; OD tubbing</td>
			<td>Upchurch Scientific</td>
			<td style="width:207px;">UPCHF-125</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Female nut for microferule</td>
			<td>Upchurch Scientific</td>
			<td style="width:207px;">UPCHP-416</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Microferule</td>
			<td>Upchurch Scientific</td>
			<td style="width:207px;">UPCHF-132</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Pressure Bomb NanoBaume</td>
			<td style="width:424px;">Western Fluids Engineering</td>
			<td style="width:207px;">SP-400</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Shimadzu Prominence UFLC system</td>
			<td style="width:424px;">Shimadzu</td>
			<td style="width:207px;">Prominence UFLC</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Bullet Blender</td>
			<td style="width:424px;">Next Advance</td>
			<td style="width:207px;">BBX24</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Safe-lock tubes</td>
			<td style="width:424px;">Eppendorf&#160;</td>
			<td>T9661-1000EA</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Stainless steel beads. 0.9 &#8211; 2.0 mm. 1 lb. Non-sterile.</td>
			<td style="width:424px;">Next Advance</td>
			<td>SSB14B</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Table-top centrifuge&#160;</td>
			<td style="width:424px;">Hettich Zentrifugen</td>
			<td style="width:207px;">Rotina 380 R</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Standard Digital Heated Circulating Bath, 120VAC</td>
			<td style="width:424px;">PolyScience 8006 6L</td>
			<td style="width:207px;">8006A11B</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sep-pack c18 desalting cartridge 50 mg</td>
			<td style="width:424px;">Waters</td>
			<td style="width:207px;">WAT020805</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Vacumm concentrator</td>
			<td style="width:424px;">Eppendorf&#160;</td>
			<td style="width:207px;">Concentrator Plus System</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Dionex UltiMate 3000 UHPLC&#160;</td>
			<td style="width:424px;">Dionex</td>
			<td style="width:207px;">UltiMate 3000 UHPLC&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Orbitrap Elite mass spectrometer</td>
			<td style="width:424px;">Thermo Fisher Scientific Inc.</td>
			<td style="width:207px;">ORBITRAP ELITE</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Michrom Thermo CaptiveSpray&#160;</td>
			<td style="width:424px;">Michrom-Bruker Inc.</td>
			<td style="width:207px;">TCSI-SS2</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Incubator INCUCELL&#160;</td>
			<td style="width:424px;">MMM Group</td>
			<td style="width:207px;">INCUCELL111</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sequencing-grade modified trypsin</td>
			<td style="width:424px;">Promega</td>
			<td style="width:207px;">V5111</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Protease inhibitor cocktail tablets</td>
			<td style="width:424px;">Roche</td>
			<td style="width:207px;">11836170001 (ROCHE)</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Phosphate buffer solution 10X (diluted to 1x)</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">P5493</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Ammonium acetate</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">A1542</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Sodium deoxycholate</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">D6750</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Dithiothreitol</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">D0632</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Iodoacetamide</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">i6125</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Formic acid</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">F0507 (HONEYWELL)</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Ammonium hydroxide</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">338818 (HONEYWELL)</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Acetonitrile HPLC grade</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">675415</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Isopropanol HPLC grade</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">675431</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:359px;">Water HPLC grade</td>
			<td style="width:424px;">Sigma-Aldrich</td>
			<td style="width:207px;">14263</td>
			<td></td>
		</tr>
	</tbody>
</table>

lerlic-ms/ms for in-depth characterization and quantification of glutamine and asparagine deamidation in shotgun proteomics

蛋白质脱酰胺化的表征是势在必行破译在人体病理学和其他生化上下文该蛋白的翻译后修饰（PTM）的作用（S）和潜力。为了进行蛋白质脱酰胺的表征，我们最近开发了一种新型长条静电排斥亲水性相互作用色谱 - 串联质谱（LERLIC-MS / MS）方法，其可以分离谷氨酰胺（Gln）和天冬酰胺（ASN）同种型脱酰胺的产物从模型化合物到高度复杂的生物样品。 LERLIC-MS / MS，因此，第一鸟枪蛋白质组学策略的Gln脱酰胺同种型的分离和定量。我们还证明，作为新颖性，在这里列出的样品处理方案稳定琥珀酰亚胺中间体允许由LERLIC-MS / MS表征。如图所示这个视频文章中LERLIC-MS / MS的应用可以帮助阐明目前不明蛋白质脱酰胺的n个分子阵列。此外，LERLIC-MS / MS提供了涵盖不同的生物学背景脱酰胺酶反应的进一步理解。

谷氨酰胺和天冬酰胺残基的脱酰胺化被认为在几种慢性和致命疾病14牵连退行性蛋白修饰（DPM）。已经证明，这种PTM可以预测的抗体和其他分子的半衰期和降解状态在人体内和相似的生物学背景1，15。蛋白质脱酰胺的意义，其实超越了生物医学的背景下，因此这种修改存在于不同的蛋白质组<sup...

Watch this Scientific Journal Video about LERLIC-MS/MS for In-depth Characterization and Quantification of Glutamine and Asparagine Deamidation in Shotgun Proteomics at JoVE.com

LERLIC-MS/MS for In-depth Characterization and Quantification of Glutamine and Asparagine Deamidation in Shotgun Proteomics

这里，我们提出的长条静电排斥亲水相互作用色谱 - 串联质谱（LERLIC-MS / MS）的方法的一个步骤一步协议。这是一种新的方法，使通过鸟枪蛋白质组学的谷氨酰胺和天冬酰胺脱酰胺亚型的第一次定量和定性。

LERLIC-MS / MS进行深入表征和谷氨酰胺的定量和天冬酰胺脱酰胺在鸟枪蛋白质组学

Characterization of protein deamidation is imperative to decipher the role(s) and potentialities of this protein posttranslational modification (PTM) in ...

Research

JoVE Journal

Biochemistry

Deep Proteome Profiling by Isobaric Labeling, Extensive Liquid Chromatography, Mass Spectrometry, and Software-assisted Quantification

用等压标记、广泛的液相色谱法、质谱法和软件辅助定量技术进行深层蛋白质组分析

Many exceptional advances have been made in mass spectrometry (MS)-based proteomics, with particular technical progress in liquid chromatography (LC) ...

科研

生物化学

Characterization of Glycoproteins with the Immunoglobulin Fold by X-Ray Crystallography and Biophysical Techniques

用 X 射线晶体学和生物物理技术表征免疫球蛋白折叠的糖蛋白

Glycoproteins on the surface of cells play critical roles in cellular function, including signalling, adhesion and transport. On leukocytes, several of ...

Extracellular Protein Microarray Technology for High Throughput Detection of Low Affinity Receptor-Ligand Interactions

低亲和力受体-配体相互作用的细胞外蛋白微阵列技术

Secreted factors, membrane-tethered receptors, and their interacting partners are main regulators of cellular communication and initiation of signaling ...

Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry

通过肽浓缩和质谱检测蛋白质泛化位点检测

The posttranslational modification of proteins by the small protein ubiquitin is involved in many cellular events. After tryptic digestion of ...

SUMO-Binding Entities (SUBEs) as Tools for the Enrichment, Isolation, Identification, and Characterization of the SUMO Proteome in Liver Cancer

SUMO-Binding Entities SUBEs as Tools for the Enrichment, Isolation, Identification, and Characterization of the SUMO Proteome in Liver Cancer

SUMO 结合实体 （SUBEs） 作为肝癌中 SUMO 蛋白酶的浓缩、分离、识别和表征的工具

Post-translational modification is a key mechanism regulating protein homeostasis and function in eukaryotic cells. Among all ubiquitin-like proteins in ...

Quantification of Coenzyme A in Cells and Tissues

细胞和组织中辅酶A的定量

Emerging research has revealed that the cellular coenzyme A (CoA) supply can become limiting with a detrimental impact on growth, metabolism and survival. ...

TMT Sample Preparation for Proteomics Facility Submission and Subsequent Data Analysis

蛋白质组学设施提交和后续数据分析的TMT样品制备

Proteomic technologies are powerful methodologies that can aid our understanding of mechanisms of action in biological systems by providing a global view ...

JUMPn: A Streamlined Application for Protein Co-Expression Clustering and Network Analysis in Proteomics

JUMPn：蛋白质共表达聚类和网络分析在蛋白质组学中的简化应用

With recent advances in mass spectrometry-based proteomics technologies, deep profiling of hundreds of proteomes has become increasingly feasible. ...

Shotgun Proteomics Sample Processing Automated by an Open-Source Lab Robot

Shotgun 蛋白质组学 样品处理 由开源实验室机器人自动执行

Mass spectrometry-based shotgun proteomics experiments require multiple sample preparation steps, including enzymatic protein digestion and clean-up, ...

Shotgun Lipidomics of Rodent Tissues

啮齿动物组织的霰弹枪脂质组学

Lipids play a vital role as essential components of all prokaryotic and eukaryotic cells. Constant technological improvements in mass spectrometry have ...