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PXD048452-1

PXD048452 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleDeciphering Diazirine Reaction Mechanism: through Irradiation Modulation for Residue-Specific Distance Restraints in Protein Photo-Crosslinking
DescriptionThe diazirine photoreactive group has been widely used for photo-labeling and photo-cross-linking (PXL) of proteins. Yet, due to the mechanistic complexity of diazirine photo-reaction, site-specific and quantitative analysis of protein PXL data remains challenging. Herein, we have built an in-line photo-reaction monitoring system, capable of systematically varying optical power density and irradiation time. Using this system, we have determined the kinetic parameters of diazirine photo-reactions, and shown that an alkyl diazirine undergoes rearrangement upon irradiation to yield a diazo intermediate. A carbene intermediate is produced from the diazo intermediate upon further irradiation, whereas at a relatively small proportion, it is produced directly from the diazirine. Both diazo and carbene intermediates react with protein side-chains. Significantly, the diazo intermediate preferentially reacts with polar side-chains, exhibiting much higher specificity than the carbene intermediate. As the diazo and carbene intermediates are generated sequentially, modulating irradiation time and optical power density can achieve site- or space- selective PXL results through different mechanisms. Together, we have established a new approach for the kinetic mechanism of photo-reactions, and paved the way for quantitative analysis of PXLs to visualize protein structure and dynamics.
HostingRepositoryPRIDE
AnnounceDate2024-06-22
AnnouncementXMLSubmission_2024-06-22_00:54:05.565.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitteryida jiang
SpeciesList scientific name: Bos taurus (Bovine); NCBI TaxID: 9913;
ModificationListacetylated residue; monohydroxylated residue; iodoacetamide derivatized residue
InstrumentOrbitrap Fusion Lumos
Dataset History
RevisionDatetimeStatusChangeLog Entry
02024-01-11 02:49:31ID requested
12024-06-22 00:54:05announced
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: photo cross-linking, multiple reaction monitoring, optical power density, distance restraints, alkyl diazirine
Contact List
Yida Jiang,
contact affiliation1Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. 2Analytical Instrumentation Center, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. 3Center for Quantitative Biology, PKU-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
contact emailTang_Chun@pku.edu.cn
lab head
yida jiang
contact affiliationBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
contact emailjiangyida@pku.edu.cn
dataset submitter
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