PMID- 10460833 OWN - NLM STAT- MEDLINE DCOM- 19991104 LR - 20200403 IS - 0959-6658 (Print) IS - 0959-6658 (Linking) VI - 9 IP - 9 DP - 1999 Sep TI - Characterization of human vascular endothelial cadherin glycans. PG - 915-25 AB - The glycosylation pattern of human vascular endothelial cadherin (VE-cadherin), purified from cultured human umbilical cord vein endothelial cells, was analyzed. VE-cadherin was metabolically radiolabeled with d-[6-(3)H]glucosamine, isolated by immunoprecipitation, purified by SDS-PAGE and in-gel digested with endoproteinase Asp N. Oligosaccharides were sequentially released from resulting glycopeptides and analyzed by chromatographic profiling. The results revealed that VE-cadherin carries predominantly sialylated diantennary and hybrid-type glycans in addition to some triantennary and high mannose-type species. Highly branched, tetraantennary oligosaccharides were found in trace amounts only. Immunohistochemical labeling of VE-cadherin and sialic acids displayed a codistribution along the intercellular junctions in endothelial cells of human umbilical arteries, veins, and cultured endothelial monolayers. Ca(2+)-depletion, performed on cultured endothelial cells, resulted in a reversible complete disappearance of VE-cadherin and of almost all sialic acid staining from the junctions. Sialidase treatment of whole cells caused a change of VE-cadherin immunofluorescence from a continuous and netlike superstructural organization to a scattered inconsistent one. Hence, cell surface sialic acids might play a role in VE-cadherin organization. FAU - Geyer, H AU - Geyer H AD - Institute of Biochemistry, Justus-Liebig-Universitat Giessen, Friedrichstrasse 24, D-35392 Giessen, Germany. FAU - Geyer, R AU - Geyer R FAU - Odenthal-Schnittler, M AU - Odenthal-Schnittler M FAU - Schnittler, H J AU - Schnittler HJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Glycobiology JT - Glycobiology JID - 9104124 RN - 0 (Actins) RN - 0 (Antigens, CD) RN - 0 (Cadherins) RN - 0 (Glycoproteins) RN - 0 (Oligosaccharides) RN - 0 (cadherin 5) RN - GZP2782OP0 (N-Acetylneuraminic Acid) SB - IM MH - Actins/isolation & purification MH - Antigens, CD MH - Cadherins/*chemistry MH - Carbohydrate Sequence MH - Cells, Cultured MH - Endothelium, Vascular/*chemistry MH - Glycoproteins/*chemistry MH - Humans MH - Intercellular Junctions/chemistry MH - Molecular Sequence Data MH - N-Acetylneuraminic Acid/isolation & purification MH - Oligosaccharides/*chemistry MH - Umbilical Veins/cytology PMC - PMC7108604 EDAT- 1999/08/26 00:00 MHDA- 1999/08/26 00:01 CRDT- 1999/08/26 00:00 PHST- 1999/08/26 00:00 [pubmed] PHST- 1999/08/26 00:01 [medline] PHST- 1999/08/26 00:00 [entrez] AID - cwc092 [pii] AID - 10.1093/glycob/9.9.915 [doi] PST - ppublish SO - Glycobiology. 1999 Sep;9(9):915-25. doi: 10.1093/glycob/9.9.915.