Evaluation of sample preparation protocols for proteomic analysis of sunflower leaves
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- 作者：Marcelo Anselmo Oseas da Silva ; Jerusa Simone Garcia ; Gustavo Henrique Martins Ferreira de Souza ; Marcos Nogueira Eberlin ; Fá ; bio Cé ; sar Gozzo ; Marco Auré ; lio Zezzi Arruda
- 关键词：2D electrophoresis ; Sunflower ; Sample preparation ; MALDI-Q-TOF MS ; Cross species identification
- 刊名：Talanta
- 出版年：2010
- 出版时间：15 February 2010
- 年：2010
- 卷：80
- 期：4
- 页码：1545-1551
- 全文大小：452 K
文摘
Six protocols for extraction of proteins from sunflower (Helianthus annuus L.) leaves were evaluated for their abilities in both removing interferents and attaining the best resolution in two-dimensional gel electrophoresis. “Classical” phenol extraction followed by precipitation with ammonium acetate in methanol displayed the most efficient protocol, which allowed the detection of 244 protein spots with ca. 485 μg of protein in gel electrophoresis. Tandem mass spectrometry was performed to identify proteins in 61 spots, and cross species identification was used for this task. Proteins from twenty two spots were identified, and 12 of these proteins are up to now not included into the ExPASy sunflower protein databank.