Proteomics

Dataset Information

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Deep Protein Arginine Asymmetric Di-Methylation Profiling of Breast Cancer Patient-derived Xenografts


ABSTRACT: Arginine methylation catalyzed by protein arginine methyltransferases (PRMTs) is a prevalent posttranslational modification that regulates diverse cellular processes. Aberrant expression of type I PRMTs that catalyze asymmetric arginine demethylation (ADMA) is often found in cancer; however, little is known about the ADMA status of substrate proteins in tumors. Using LC-MS/MS along with pan-specific ADMA antibodies, we performed global mapping of ADMA in five patient-derived xenograft (PDX) tumors representing different subtypes of human breast cancer and identified 415 methylated peptides from 213 proteins. Approximately 70% of the putative substrates were validated using peptide arrays in vitro methylated by PRMT1, PRMT4, and PRMT6, among which 48% of substrates varied from estrogen receptor (ER) positive and negative tumors. Comparing with our previously identified ADMA sites from breast cancer cell lines, 75 ADMA sites overlapped between cell lines and PDX tumors. Collectively, this study provides a useful resource to PRMT and breast cancer communities to exploit the functions of PRMT dysregulation during breast cancer progression.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Homo Sapiens (human)

SUBMITTER: Min Ma  

LAB HEAD: lingjun Li

PROVIDER: PXD038203 | Pride | 2024-01-26

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
HCI001_ADMA_R1.raw Raw
HCI001_ADMA_R2.raw Raw
HCI002_ADMA_R1.raw Raw
HCI002_ADMA_R2.raw Raw
HCI007_ADMA_R1.raw Raw
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Publications

Proteome-wide Profiling of Asymmetric Dimethylated Arginine in Human Breast Tumors.

Ma Min M   Liu Fabao F   Miles Hannah N HN   Kim Eui-Jun EJ   Fields Lauren L   Xu Wei W   Li Lingjun L  

Journal of the American Society for Mass Spectrometry 20230718 8


Arginine methylation catalyzed by protein arginine methyltransferases (PRMTs) is a prevalent post-translational modification (PTM) that regulates diverse cellular processes. Aberrant expression of type I PRMTs that catalyze asymmetric arginine dimethylation (ADMA) is often found in cancer, though little is known about the ADMA status of substrate proteins in tumors. Using LC-MS/MS along with pan-specific ADMA antibodies, we performed global mapping of ADMA in five patient-derived xenograft (PDX)  ...[more]

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