Rabbit Antidiethoxyphosphotyrosine Antibody, Made by Single B Cell Cloning, Detects Chlorpyrifos Oxon-Modified Proteins in Cultured Cells and Immunopurifies Modified Peptides for Mass Spectrometry

ÖNDER S., van Grol M., Fidder A., Xiao G., Noort D., Yerramalla U., ...Daha Fazla

JOURNAL OF PROTEOME RESEARCH, cilt.20, sa.10, ss.4728-4745, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 20 Sayı: 10
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1021/acs.jproteome.1c00383
  • Dergi Adı: JOURNAL OF PROTEOME RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, EMBASE, MEDLINE
  • Sayfa Sayıları: ss.4728-4745
  • Anahtar Kelimeler: diethoxyphosphotyrosine, mass spectrometry, Protein Prospector, N2a neuroblastoma, SH-SY5Y, single B cell cloning, rabbit monoclonal, BINDING, EXPOSURE, PHOSPHORYLATION, ACETYLCHOLINESTERASE, TYROSINE, SITE, DIFFERENTIATION, NEUROTOXICITY, INHIBITION, PESTICIDES
  • Hacettepe Üniversitesi Adresli: Evet

Özet

Chronic low-dose exposure to organophosphorus pesticides is associated with the risk of neurodegenerative disease. The mechanism of neurotoxicity is independent of acetylcholinesterase inhibition. Adducts on tyrosine, lysine, threonine, and serine can occur after exposure to organophosphorus pesticides, the most stable being adducts on tyrosine. Rabbit monoclonal 1C6 to diethoxyphosphate-modified tyrosine (depY) was created by single B cell cloning. The amino acid sequence and binding constant (K-d 3.2 x 10(-8) M) were determined. Cultured human neuroblastoma SH-SY5Y and mouse neuroblastoma N2a cells incubated with a subcytotoxic dose of 10 mu M chlorpyrifos oxon contained depYmodified proteins detected by monoclonal 1C6 on Western blots. depYlabeled peptides from tryptic digests of cell lysates were immunopurified by binding to immobilized 1C6. Peptides released with 50% acetonitrile and 1% formic acid were analyzed by liquid chromatography tandem mass spectrometry (LC-MS/MS) on an Orbitrap Fusion Lumos mass spectrometer. Protein Prospector database searches identified 51 peptides modified on tyrosine by diethoxyphosphate in SH-SY5Y cell lysate and 73 diethoxyphosphate-modified peptides in N2a cell lysate. Adducts appeared most frequently on the cytoskeleton proteins tubulin, actin, and vimentin. It was concluded that rabbit monoclonal 1C6 can be useful for studies that aim to understand the mechanism of neurotoxicity resulting from low-dose exposure to organophosphorus pesticides.