Assay of protein and peptide adducts of cholesterol ozonolysis products by hydrophobic and click enrichment methods.
Assay of protein and peptide adducts of cholesterol ozonolysis products by hydrophobic and click enrichment methods.
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通过疏水和点击富集方法测定胆固醇臭氧分解产物的蛋白质和肽加合物。
DOI:
10.1021/tx500229h
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发表时间:
2014
影响因子:
4.1
通讯作者:
Porter,NedA
中科院分区:
文献类型:
--
作者:
Windsor,Katherine;Genaro-Mattos,ThiagoC;Miyamoto,Sayuri;Stec,DonaldF;Kim,Hye-YoungH;Tallman,KeriA;Porter,NedA
Cholesterol undergoes ozonolysis to afford a variety of oxysterol products, including cholesterol-5,6-epoxide (CholEp) and the isomeric aldehydes secosterol A (seco A) and secosterol B (seco B). These oxysterols display numerous important biological activities, including protein adduction; however, much remains to be learned about the identity of the reactive species and the range of proteins modified by these oxysterols. Here, we synthesized alkynyl derivatives of cholesterol-derived oxysterols and employed a straightforward detection method to establish secosterols A and B as the most protein-reactive of the oxysterols tested. Model adduction studies with an amino acid, peptides, and proteins provide evidence for the potential role of secosterol dehydration products in protein adduction. Hydrophobic separation methodsFolch extraction and solid phase extraction (SPE)were successfully applied to enrich oxysterol-adducted peptide species, and LC-MS/MS analysis of a model peptide–seco adduct revealed a unique fragmentation pattern (neutral loss of 390 Da) for that species. Coupling a hydrophobic enrichment method with proteomic analysis utilizing characteristic fragmentation patterns facilitates the identification of secosterol-modified peptides and proteins in an adducted protein. More broadly, these improved enrichment methods may give insight into the role of oxysterols and ozone exposure in the pathogenesis of a variety of diseases, including atherosclerosis, Alzheimer’s disease, Parkinson’s disease, and asthma.
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影响因子:
6.7
作者:
A. Carter;J. Bevan;S. Hanley;W. Morgan;D. Turner
通讯作者:
D. Turner
DOI:
--
发表时间:
1982
期刊:
Journal of applied physiology: respiratory, environmental and exercise physiology
影响因子:
--
作者:
G. Gurtner;Philip L. Smith;A. Knoblauch;H. Makhzoumi;R. Traystman;N. Adkinson
通讯作者:
N. Adkinson
影响因子:
--
作者:
J. Mehta;A. Roberts
通讯作者:
A. Roberts
影响因子:
--
作者:
W. Rosenblum;B. Zweifach
通讯作者:
B. Zweifach
影响因子:
4.1
作者:
T. Sasaki;S. Wakai;T. Asano;T. Watanabe;T. Kirino;K. Sano
通讯作者:
K. Sano