title: Evaluation of D10-Leu metabolic labeling coupled with MALDI-MS analysis in studying the response of the yeast proteome to H2O2 challenge.
abstract: An efficient D10-Leu metabolic-labeling method combined with isotope-ratio quantitation by MALDI-TOF MS was used to probe the response of the yeast proteome to H2O2. Control cultures correct for effects not associated with H2O2 challenge. A stress-response index to H2O2 (SRIH2O2) is defined, and values are reported for seven proteins at 45-225 min following exposure to 0.4 mM H2O2. The time course of protein accumulation in unstressed cells following the H10- to D10-SCD switch suggests that proteome responses at <45 min could be monitored by addition of excess D10-Leu to H10-cultures.
authors.affiliation: Centre for Biological Applications of Mass Spectrometry, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, Canada H4B 1R6.
authors.forename: Heng
authors.initials: H
authors.lastname: Jiang
authors.forename: Ann M
authors.initials: AM
authors.lastname: English
mesh_terms: D003903:Deuterium; D006019:Glycolysis / Q000187:drug effects; D006861:Hydrogen Peroxide / Q000633:toxicity; D007930:Leucine / Q000737:chemistry / Q000378:metabolism*; D018384:Oxidative Stress; D020543:Proteome / Q000032:analysis* / Q000378:metabolism; D040901:Proteomics / Q000379:methods*; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000201:enzymology / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000032:analysis* / Q000378:metabolism; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods
chemical_list: D020543:Proteome; D029701:Saccharomyces cerevisiae Proteins; D003903:Deuterium; D006861:Hydrogen Peroxide; D007930:Leucine