Analysis of N-linked oligosaccharides released from glycoproteins separated by two-dimensional gel electrophoresis.
Anal Biochem
; 284(1): 49-59, 2000 Aug 15.
Article
en En
| MEDLINE
| ID: mdl-10933855
ABSTRACT
Protocols have been developed for the characterization of carbohydrate covalently attached (N-linked) to an asparagine residue in glycoproteins, after separation by two-dimensional polyacrylamide gel electrophoresis (2-D PAGE). Mixtures of proteins (each at a level from 0.5 to 50 microg) were resolved in the first dimension according to their isoelectric points (pI), followed by separation in the orthogonal axis on the basis of their molecular weights. Glycans were released directly from excised gel spots after digestion with PNGase F, with or without prior treatment with trypsin. In a third method, glycoproteins were electroblotted onto poly(vinylidene difluoride) before glycans were released by PNGase F. For all these procedures profiles of the neutral and sialic acid-containing oligosaccharide mixtures were obtained after derivatization with 3-acetamido-6-aminoacridine, and analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and/or high-performance liquid chromatography. Potential applications to proteomics are discussed.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Oligosacáridos
/
Glicoproteínas
/
Electroforesis en Gel Bidimensional
Tipo de estudio:
Guideline
Límite:
Animals
Idioma:
En
Revista:
Anal Biochem
Año:
2000
Tipo del documento:
Article
País de afiliación:
Reino Unido