Structural characterization of heparan sulfate proteoglycan subclasses isolated from bovine aortic endothelial cell cultures

Journal Article · Tue Mar 22 04:00:00 EST 1988 · Biochemistry; (United States)

DOI:https://doi.org/10.1021/bi00406a048· OSTI ID:7126082

Kinsella, M G; Wight, T N

Labeled heparan sulfate proteoglycans (HSPG) were isolated from wounded and confluent cultures of bovine aortic endothelial cells by nondegradative extraction with 4 M guanidine hydrochloride and detergent. HSPG were separated from more highly charged chondroitin or dermatan sulfate proteoglycans by ion-exchange chromatography, and subclasses of different hydrodynamic size were isolated by gel filtration. Three major subclasses of HSPG were characterized structurally with respect to the presence and relative size of protein core, the presence and amount of nonsulfated oligosaccharide, and size and structure of heparan sulfate (HS) chains. The largest (600-800-kDa) HSPG subclass (I), isolated from cell layers and media of confluent cultures, bears 38-kDa HS chains on an apparently heterogeneous class of relatively large glycoprotein cores. HSPG II (150-200 kDa), isolated from cell layer or media, has 22-kDa HS chains and smaller core glycoproteins (less than 50 kDa). HSPG III, the subclass of smallest hydrodynamic size, has 13-kDa HS chains and a glycopeptide core of less than 15 kDa. All subclasses bear varying proportions of non-sulfated oligosaccharides of similar sizes. Comparisons of HS chain structure indicated that the different subclasses have similar proportions (49-55%) of N-sulfate, with both O-sulfate and highly N-sulfated blocks of disaccharide distributed similarly along HS chains. In addition, HS chains from subclasses II and III contain sequences that are insensitive to periodate oxidation or heparitinase digestion, suggesting that they contain increased proportions of iduronate.

• Research Organization: Univ. of Washington, Seattle (USA)
• OSTI ID: 7126082
• Journal Information: Biochemistry; (United States), Journal Name: Biochemistry; (United States) Vol. 27:6; ISSN BICHA
• Country of Publication: United States
• Language: English

Related Subjects

550201* -- Biochemistry-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
AMINES
AMINO ACIDS
ANIMAL TISSUES
ANIMALS
AORTA
ARTERIES
BLOOD VESSELS
BODY
CARBOHYDRATES
CARBOXYLIC ACIDS
CARDIOVASCULAR SYSTEM
CATTLE
CELL CULTURES
CHROMATOGRAPHY
DOMESTIC ANIMALS
ENDOTHELIUM
FILTRATION
GLUCOPROTEINS
GLYCOPROTEINS
HYDROXY ACIDS
ION EXCHANGE CHROMATOGRAPHY
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MAMMALS
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
MUCOPOLYSACCHARIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANS
OXYGEN COMPOUNDS
POLYSACCHARIDES
PROTEINS
RUMINANTS
SACCHARIDES
SEPARATION PROCESSES
SERINE
SULFATES
SULFUR COMPOUNDS
TISSUES
TRACER TECHNIQUES
TRITIUM COMPOUNDS
VERTEBRATES