Chatziioannidis CC, Karamanos NK, Anagnostides ST, Tsegenidis T. Purification and characterisation of a minor low-sulphated dermatan sulphate-proteoglycan from ray skin.
Biochimie 1999;
81:187-96. [PMID:
10384999 DOI:
10.1016/s0300-9084(99)80051-0]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
A minor low-sulphated dermatan sulphate proteoglycan was isolated from ray skin by extraction with 2% sodium dodecyl sulphate, followed with ion-exchange chromatography, gel chromatography and density gradient centrifugation. The proteoglycan with a relative molecular mass (Mr) ranging from 70 to 120 kDa is composed of about two dermatan sulphate chains (Mr 33 kDa) bound on a protein core of Mr 27 kDa, and oligosaccharides consisting of uronic acids, hexosamines and neutral sugars. The major amino acids of the protein core were glycine (corresponding to about one-fourth of the total amino acids), serine, threonine, glutamic acid/glutamine, leucine and cysteine, together amounting to 56% of the total. The isolated proteoglycan does not interact with hyaluronic acid and does not form self-aggregates. Dermatan sulphate was rich in iduronic acid (62% of total uronic acid) and composed of non-sulphated (44%), and mono-sulphated disaccharides bearing esterified sulphate groups at positions C-4 (53%) or C-6 (3%) of the N-acetyl galactosamine. HPLC analysis of a pure preparation of dermatan sulphate, showed the presence of galactose and glucose possibly as branches on the dermatan sulphate chain.
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