PMID- 32518939 OWN - NLM STAT- MEDLINE DCOM- 20220117 LR - 20220117 IS - 1460-2423 (Electronic) IS - 0959-6658 (Linking) VI - 31 IP - 1 DP - 2021 Jan 9 TI - The single EGF-like domain of mouse PAMR1 is modified by O-Glucose, O-Fucose and O-GlcNAc. PG - 55-68 LID - 10.1093/glycob/cwaa051 [doi] AB - Epidermal growth factor-like domains (EGF-LDs) of membrane and secreted proteins can be modified by N-glycans and/or potentially elongated O-linked monosaccharides such as O-glucose (O-Glc) found at two positions (O-Glc 1 and O-Glc2), O-fucose (O-Fuc) and O-N-acetylglucosamine (O-GlcNAc). The presence of three O-linked sugars within the same EGF-LD, such as in EGF-LD 20 of NOTCH1, has rarely been evidenced. We searched in KEGG GENES database to list mouse and human proteins with an EGF-LD sequence including one, two, three or four potential O-glycosylation consensus sites. Among the 129 murine retrieved proteins, most had predicted O-fucosylation and/or O-GlcNAcylation sites. Around 68% of EGF-LDs were subjected to only one O-linked sugar modification and near 5% to three modifications. Among these latter, we focused on the peptidase domain-containing protein associated with muscle regeneration 1 (PAMR1), having only one EGF-LD. To test the ability of this domain to be glycosylated, a correctly folded EGF-LD was produced in Escherichia coli periplasm, purified and subjected to in vitro incubations with the recombinant O-glycosyltransferases POGLUT1, POFUT1 and EOGT, adding O-Glc1, O-Fuc and O-GlcNAc, respectively. Using click chemistry and mass spectrometry, isolated PAMR1 EGF-LD was demonstrated to be modified by the three O-linked sugars. Their presence was individually confirmed on EGF-LD of full-length mouse recombinant PAMR1, with at least some molecules modified by both O-Glc1 and O-Fuc. Overall, these results are consistent with the presence of a triple O-glycosylated EGF-LD in mouse PAMR1. CI - (c) The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. FAU - Pennarubia, Florian AU - Pennarubia F AD - University of Limoges, PEIRENE, EA 7500, Glycosylation and Cell Differentiation, F-87060 Limoges, France. FAU - Germot, Agnes AU - Germot A AD - University of Limoges, PEIRENE, EA 7500, Glycosylation and Cell Differentiation, F-87060 Limoges, France. FAU - Pinault, Emilie AU - Pinault E AD - University of Limoges, PEIRENE, EA 7500, Glycosylation and Cell Differentiation, F-87060 Limoges, France. AD - University of Limoges, BISCEm, US 42 INSERM - UMS 2015 CNRS, Mass Spectrometry Platform, F-87025 Limoges, France. FAU - Maftah, Abderrahman AU - Maftah A AD - University of Limoges, PEIRENE, EA 7500, Glycosylation and Cell Differentiation, F-87060 Limoges, France. FAU - Legardinier, Sebastien AU - Legardinier S AD - University of Limoges, PEIRENE, EA 7500, Glycosylation and Cell Differentiation, F-87060 Limoges, France. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Glycobiology JT - Glycobiology JID - 9104124 RN - 0 (Recombinant Proteins) RN - 28RYY2IV3F (Fucose) RN - 62229-50-9 (Epidermal Growth Factor) RN - EC 2.4.1.- (N-Acetylglucosaminyltransferases) RN - EC 3.4.- (Serine Proteases) RN - EC 3.4.21.- (Pamr1 protein, mouse) RN - IY9XDZ35W2 (Glucose) RN - V956696549 (Acetylglucosamine) SB - IM MH - Acetylglucosamine/chemistry/*metabolism MH - Animals MH - Databases, Protein MH - Epidermal Growth Factor/chemistry/isolation & purification/*metabolism MH - Fucose/chemistry/*metabolism MH - Glucose/chemistry/*metabolism MH - Humans MH - Mice MH - N-Acetylglucosaminyltransferases/chemistry/*metabolism MH - Recombinant Proteins/chemistry/metabolism MH - Serine Proteases/chemistry/*metabolism OTO - NOTNLM OT - EGF-LD OT - EOGT OT - PAMR1 OT - POFUT1 OT - POGLUT EDAT- 2020/06/11 06:00 MHDA- 2022/01/18 06:00 CRDT- 2020/06/11 06:00 PHST- 2020/04/19 00:00 [received] PHST- 2020/05/22 00:00 [revised] PHST- 2020/05/28 00:00 [accepted] PHST- 2020/06/11 06:00 [pubmed] PHST- 2022/01/18 06:00 [medline] PHST- 2020/06/11 06:00 [entrez] AID - 5849841 [pii] AID - 10.1093/glycob/cwaa051 [doi] PST - ppublish SO - Glycobiology. 2021 Jan 9;31(1):55-68. doi: 10.1093/glycob/cwaa051.