Proteomics

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Identification of intracellular glycosaminoglycan-interacting proteins by affinity purification mass spectrometry


ABSTRACT: Glycosaminoglycans (GAGs) are essential functional components of the extracellular matrix (ECM). Artificial GAGs like sulfated hyaluronan (sHA) exhibit pro-osteogenic properties and boost healing processes and hence are of high interest for supporting wound healing. Although sulfated GAGs (sGAGs) are internalized into cells, knowledge of intracellular effects and interaction partners is scarce. Here we used an affinity-purification mass spectrometry-based (AP-MS) approach to identify novel and particularly intracellular sGAG-interacting proteins from human bone marrow stromal cells (hBMSC). Overall, 478 proteins were found interacting with at least one of four distinct sGAGs. Enrichment analysis for protein localization showed that mainly intracellular and cell-associated interacting proteins were identified. Only a limited fraction of about 10 % was annotated for extracellular regions. The interactions of the 2-macroglobulin receptor-associated protein (LRPAP1), exportin-1 (XPO1), and Serine protease HTRA1 (HTRA1) were confirmed in reverse assays.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Cell Culture, Bone Marrow

SUBMITTER: Henning Großkopf  

LAB HEAD: Martin von Bergen

PROVIDER: PXD023362 | Pride | 2021-11-03

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
6psHA_363.raw Raw
6psHA_528.raw Raw
6psHA_530.raw Raw
6psHA_532.raw Raw
6psHA_633.raw Raw
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Publications

Identification of intracellular glycosaminoglycan-interacting proteins by affinity purification mass spectrometry.

Großkopf Henning H   Vogel Sarah S   Müller Claudia Damaris CD   Köhling Sebastian S   Dürig Jan-Niklas JN   Möller Stephanie S   Schnabelrauch Matthias M   Rademann Jörg J   Hempel Ute U   von Bergen Martin M   Schubert Kristin K  

Biological chemistry 20210901 11


Glycosaminoglycans (GAGs) are essential functional components of the extracellular matrix (ECM). Artificial GAGs like sulfated hyaluronan (sHA) exhibit pro-osteogenic properties and boost healing processes. Hence, they are of high interest for supporting bone regeneration and wound healing. Although sulfated GAGs (sGAGs) appear intracellularly, the knowledge about intracellular effects and putative interaction partners is scarce. Here we used an affinity-purification mass spectrometry-based (AP-  ...[more]

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