Separation and identification of carp pituitary proteins and glycoproteins
Czech Journal of Animal Science(2018)
Abstract
Carp pituitary proteins and glycoproteins were separated by the combination of immobilized metal affinity chromatography (IMAC) and affinity chromatography on Con A-Sepharose. The protein fractions were analysed by SDS-PAGE. Luteinizing hormone (in the alpha(1)beta and alpha(2)beta forms), growth hormone, free alpha(1) subunit and beta subunit of thyroid-stimulating hormone were identified by N-terminal amino acid sequencing. N-linked oligosaccharide chains of thyroid-stimulating hormone (beta TSH) were separated after fluorescent labelling on a GlycoSep N column and treated by exoglycosidases. Among the saccharide components, complex and hybrid structures terminating SO4-GalNAc-GlcNAc-Man-, and high mannose structures, with 1 to 8 mannose units attached to the oligosaccharide core (GlcNAc)(2)(Man)(3), were found.
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Key words
carp hormones,glycoproteins,immobilized metal ion affinity chromatography (IMAC),oligosaccharide chains
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