Proteomics

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Structural Analysis of Phosphorylation Proteoforms in a Dynamic Heterogeneous System Using Flash Oxidation Coupled In-Line with Ion Exchange Chromatography

ABSTRACT: Protein post-translational modifications (PTMs) are key modulators of protein structure and function that often change in a dynamic fashion in response to cellular stimuli. Dynamic post-translational modifications are very challenging to structurally characterize using modern techniques, including covalent labeling methods, due to the presence of multiple proteoforms and conformers together in solution. Here, we have coupled ion exchange HPLC with a flash oxidation system (IEX LC-FOX) to successfully elucidate structural changes among three phosphoproteoforms of ovalbumin (OVA) during dephosphorylation with alkaline phosphatase (AP).

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Gallus Gallus (chicken)

SUBMITTER: Sandeep Misra  

LAB HEAD: Joshua S. Sharp

PROVIDER: PXD037050 | Pride | 2023-01-16

REPOSITORIES: Pride

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Dataset's files

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OVA-UV2-peak1-100min-1.raw Raw
OVA-UV2-peak1-100min-1.xlsx Xlsx
OVA-UV2-peak1-100min.raw Raw
OVA-UV2-peak1-100min.xlsx Xlsx
OVA-UV2-peak1-40min-1.raw Raw
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Structural Analysis of Phosphorylation Proteoforms in a Dynamic Heterogeneous System Using Flash Oxidation Coupled In-Line with Ion Exchange Chromatography.

Cheng Zhi Z   Misra Sandeep K SK   Shami Anter A   Sharp Joshua S JS  

Analytical chemistry 20221213 51

Protein posttranslational modifications (PTMs) are key modulators of protein structure and function that often change in a dynamic fashion in response to cellular stimuli. Dynamic PTMs are very challenging to structurally characterize using modern techniques, including covalent labeling methods, due to the presence of multiple proteoforms and conformers together in solution. We have coupled an ion exchange high-performance liquid chromatography separation with a flash oxidation system [ion excha  ...[more]

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