JIANG Daifeng, et al. MALDI-TOF MS identification of protein of mitochondria from cultured hepatoma cells[J]. Journal of Chongqing Medical University, 2005,(4):485-488.
JIANG Daifeng, et al. MALDI-TOF MS identification of protein of mitochondria from cultured hepatoma cells[J]. Journal of Chongqing Medical University, 2005,(4):485-488. DOI: 10.13406/j.cnki.cyxb.2005.04.001.
排名前两位的蛋白均为OXCT(3-oxoacid CoA transferase 1 precursor)
其匹配肽段为9/13
序列覆盖率为24%;且OXCT的理论分子量(56kda)
理论等电点(7.1)
与胶上L9蛋白的位置相符。故候选蛋白点L9确认为OXCT(3-oxoacid CoA transferase 1 precursor)。结论:本文所确定的鉴定策略适用于线粒体比较蛋白质组学的研究。
Abstract
Objective:To explore the optimal conditions associated with proteolytic digestion in 2-DE gel
PMF analysis and database inquiry
and to construct a mass identification strategy in research for mitochondrial comparative proteomics.Methods:The BSA standard protein was incised from 2-DE gel by Coomassie Brilliant Blue dyeing and was mixed with matrix (CHCA)
then analyzed by MALDI-TOF MS.The differentially expressed mitochondria protein L9
an unknown protein obtained from hepatoma cells QGY-7703
was identified by condition with BSA optimizing.The PMF was inquired by MS-Fit database.Results:The BSA was identified in Masses Matched number 10/11 and Sequence Overcast 19% of PMF
which proved to the reliability of experimental conditions.By database Inquiry about PMF from L9 protein
OXCT(3-oxoacid CoA transferase 1 precursor)was identified with Masses Matched number 9/13 and Sequence Overcast 24%.The OXCT was in accord with position on gel.Conclusion:This method is applicable to research for mitochondrial comparative proteomics.
mitochondriaproteomicsPeptide mass fingerprinting(PMF)Matrix assisted laser desorption ionization-time of flight mass spectroscopy(MALDI-TOF MS)Two-dimensional electrophoresis(2-DE)