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通过质谱结合埃德曼降解法和二维聚丙烯酰胺凝胶电泳对黄粉虫幼虫的一种表皮蛋白同工型进行研究。

Isoforms of a cuticular protein from larvae of the meal beetle, Tenebrio molitor, studied by mass spectrometry in combination with Edman degradation and two-dimensional polyacrylamide gel electrophoresis.

作者信息

Haebel S, Jensen C, Andersen S O, Roepstorff P

机构信息

Department of Molecular Biology, Odense University, Denmark.

出版信息

Protein Sci. 1995 Mar;4(3):394-404. doi: 10.1002/pro.5560040306.

Abstract

Simultaneous sequencing, using a combination of mass spectrometry and Edman degradation, of three approximately 15-kDa variants of a cuticular protein extracted from the meal beetle Tenebrio molitor larva is demonstrated. The information obtained by matrix-assisted laser desorption ionization mass spectrometry (MALDI MS) time-course monitoring of enzymatic digests was found essential to identify the differences among the three variants and for alignment of the peptides in the sequence. To determine whether each individual insect larva contains all three protein variants, proteins extracted from single animals were separated by two-dimensional gel electrophoresis, electroeluted from the gel spots, and analyzed by MALDI MS. Molecular weights of the proteins present in each sample could be obtained, and mass spectrometric mapping of the peptides after digestion with trypsin gave additional information. The protein isoforms were found to be allelic variants.

摘要

本文展示了使用质谱法和艾德曼降解法相结合的方法,对从黄粉虫幼虫中提取的一种约15 kDa的表皮蛋白的三种变体进行同步测序。通过基质辅助激光解吸电离质谱(MALDI MS)对酶解产物进行时间进程监测所获得的信息,对于识别这三种变体之间的差异以及肽段在序列中的比对至关重要。为了确定每只昆虫幼虫是否都含有这三种蛋白质变体,从单只动物中提取的蛋白质通过二维凝胶电泳进行分离,从凝胶斑点中电洗脱出来,并通过MALDI MS进行分析。可以获得每个样品中存在的蛋白质的分子量,用胰蛋白酶消化后的肽段的质谱图谱给出了更多信息。发现这些蛋白质异构体是等位基因变体。

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Proc Natl Acad Sci U S A. 1993 Mar 1;90(5):1927-31. doi: 10.1073/pnas.90.5.1927.

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