scholarly journals Sulphation heterogeneity in the trisaccharide (GalNAcSβ1,4GlcAβ1,3GalNAcS) isolated from the non-reducing terminal of human aggrecan chondroitin sulphate

1999 ◽  
Vol 342 (1) ◽  
pp. 223-229 ◽  
Author(s):  
Leigh A. WEST ◽  
Peter ROUGHLEY ◽  
Fred R. T. NELSON ◽  
Anna H. K. PLAAS
Keyword(s):  
Ion Exchange ◽  
Direct Effect ◽  
Chondroitin Sulphate ◽  
Gel Filtration ◽  
Gel Filtration Chromatography ◽  
Chondroitinase Abc ◽  
Human Knee ◽  
Ion Exchange Hplc

We report here the isolation and sulphation isomer analyses of trisaccharides GalNAcS(β1,4)GlcA(β1,3)GalNAcS (in which S indicates sulphate) derived from the non-reducing termini of aggrecan chondroitin sulphate. Rat chondrosarcoma and human aggrecans were digested for 1 h at 37 °C with 30 μ-units of endo-chondroitinase ABC per μg of chondroitin sulphate, and trisaccharides were isolated from the digests by ToyoPearl HW40S gel-filtration chromatography. Four trisaccharide species were identified; their sulphation isomer compositions, as determined by digestion with chondroitinase ACII and fluorescence-based ion-exchange HPLC, were GalNAc4Sβ1,4GlcAβ1,3GalNAc4S, GalNAc4Sβ1,4GlcAβ1,3GalNAc6S, GalNAc4,6Sβ1,4GlcAβ1,3GalNAc4S and GalNAc4,6Sβ1,4GlcAβ1,3GalNAc6S. The abundances of such sequences in chondroitin sulphate on aggrecan from normal (foetal to 72 years of age) and from osteoarthritic human knee cartilages were also established. The results showed that non-reducing terminal GalNAc4S or GalNAc4,6S can be linked to either a 4-sulphated or a 6-sulphated disaccharide, suggesting that the sulphation of the last disaccharide might not have a direct effect on the specificity of chondroitin sulphate terminal GalNAc sulphotransferases. Furthermore, for each aggrecan preparation examined, the 4S-to-6S ratio of all chain interior disaccharides was equivalent to that in the last repeating disaccharides at the non-reducing terminus, suggesting that neither chondroitin 4-sulphotransferase nor chondroitin 6-sulphotransferase shows preferential activity near the chain terminus.

scholarly journals 554. Efficient Scalable Purification of rAAV1 Using Ion-Exchange and Gel-Filtration Chromatography To Avoid Ultracentrifugation Procedure

2015 ◽  
Vol 23 ◽  
pp. S222
Author(s):  
Taro Tomono ◽  
Yukihiko Hirai ◽  
Hironori Okada ◽  
Tomoko Chiyo ◽  
Takashi Shimada ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Gel Filtration ◽  
Gel Filtration Chromatography

scholarly journals Structural studies on sialylated and sulphated O-glycosidic mannose-linked oligosaccharides in the chondroitin sulphate proteoglycan of brain

1987 ◽  
Vol 245 (1) ◽  
pp. 229-234 ◽  
Author(s):  
T Krusius ◽  
V N Reinhold ◽  
R K Margolis ◽  
R U Margolis
Keyword(s):  
Ion Exchange ◽  
Chondroitin Sulphate ◽  
Gel Filtration ◽  
Molecular Size ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Keratan Sulphate ◽  
Size Fractions ◽  
Sulphate Proteoglycan ◽  
Chondroitin Sulphate Proteoglycan

We have previously described the structures of neutral and sialylated O-glycosidic mannose-linked tetrasaccharides and keratan sulphate polysaccharide chains in the chondroitin sulphate proteoglycan of brain. The present paper provides information on a series of related sialylated and/or sulphated tri- to penta-saccharides released by alkaline-borohydride treatment of the proteoglycan glycopeptides. The oligosaccharides were fractionated by ion-exchange chromatography and gel filtration, and their structural properties were studied by methylation analysis and fast-atom-bombardment mass spectrometry. Five fractions containing [35S]sulphate-labelled oligosaccharides were obtained by ion-exchange chromatography, each of which was eluted from Sephadex G-50 as two well-separated peaks. The apparent Mr values of both the large- and small-molecular-size fractions increased with increasing acidity (and sulphate labelling) of the oligosaccharides. The larger-molecular-size fractions contained short mannose-linked keratan sulphate chains of Mr 3000-4500, together with some asparagine-linked oligosaccharides. The smaller tri- to penta-saccharides, of Mr 800-1400, appear to have a common GlcNac(beta 1-3)Manol core, and to contain one to two residues of sialic acid and/or sulphate.

scholarly journals Location of an epitopic site on epiglycanin by molecular immunoelectron microscopy

1985 ◽  
Vol 227 (1) ◽  
pp. 231-237 ◽  
Author(s):  
J K Wold ◽  
H S Slayter ◽  
J F Codington ◽  
R W Jeanloz
Keyword(s):  
Electron Microscopy ◽  
Ion Exchange ◽  
Immunoelectron Microscopy ◽  
Gel Filtration ◽  
Strong Tendency ◽  
Gel Filtration Chromatography ◽  
Shadow Casting ◽  
Probable Presence ◽  
Antigen Antibody

Antibodies of the IgM type present in rabbit anti-epiglycanin antiserum were purified by (NH4)2SO4 precipitation and by ion-exchange, affinity and gel-filtration chromatography. After papain treatment of this fraction, followed by gel filtration, the fraction with highest apparent Mr was incubated with epiglycanin, and the antigen-antibody complexes separated by gel filtration. These were examined by electron microscopy, using rotational shadow casting, and the photographs of the complexes were mapped for the locations of the antibody molecules on the extended epiglycanin molecules. Distribution of the frequency of attachment of immunoglobulin showed a strong tendency toward binding at one end of epiglycanin, suggesting the probable presence of only one epitope, probably a glycopeptide structure containing a beta-D-galactopyranosyl-(1→3)-2-acetamido-2-deoxy-D-galactose chain.

scholarly journals PROPERDIN FACTOR D

1974 ◽  
Vol 140 (2) ◽  
pp. 426-436 ◽  
Author(s):  
Douglas T. Fearon ◽  
K. Frank Austen ◽  
Shaun Ruddy
Keyword(s):  
Ion Exchange ◽  
Gel Electrophoresis ◽  
Gel Filtration ◽  
Direct Interaction ◽  
Electrophoretic Analysis ◽  
Radial Immunodiffusion ◽  
Gel Filtration Chromatography

The protein in the properdin pathway responsible for conversion of precursor factor D to D has been isolated and found to be identical with properdin. Sequential ion exchange and gel filtration chromatography demonstrated identity between properdin protein, measured by radial immunodiffusion, and the capacity to activate D to D, assessed by formation of the intermediate, EAC43B(D). Properdin, purified in this manner, was homogeneous on acid polyacrylamide disc gel electrophoretic analysis, with the band of protein corresponding to the position of eluates in the replicate gel capable of activating highly purified D. Demonstration of the homogeneity of purified D by alkaline disc gel electrophoresis, coupled with the linear stoichiometric hemolytic titrations of each factor, indicates that direct interaction between properdin and D generates D. Thus, activation of D by properdin represents a mechanism in the properdin pathway by which D becomes available for formation of the C3b-dependent C3 convertase.

Chromatographic and immunochemical studies on postsecretory processing of gastrin in the pig

1986 ◽  
Vol 251 (3) ◽  
pp. G300-G307
Author(s):  
D. M. Power ◽  
N. Bunnett ◽  
R. Dimaline
Keyword(s):  
Ion Exchange ◽  
Gel Filtration ◽  
Gastroepiploic Artery ◽  
Antral Mucosa ◽  
Gel Filtration Chromatography ◽  
Venous Outflow ◽  
Luminal Side ◽  
Venous Plasma

Immunoreactive forms of gastrin in antral mucosal extracts and in gastric venous plasma of the pig were compared using ion-exchange and gel-filtration chromatography and radioimmunoassay using three region-specific antiserums. In antral mucosal extracts, gastrin heptadecapeptide (G-17) accounted for over 90% of the total C-terminal immunoreactivity, but in gastric venous plasma it accounted for only 47% of total C-terminal immunoreactivity. The remaining C-terminal immunoreactivity was accounted for by shorter C-terminal forms. Unsulfated and sulfated G-17 contributed 44.1 and 49.2%, respectively, of C-terminal immunoreactivity in antral mucosa. In contrast, they contributed 14 and 30%, respectively, to total C-terminal immunoreactivity in gastric venous plasma. Incubation of antral extracts with plasma in vitro resulted in a slow loss of intact G-17 (32.3% in 60 min) that could not account for the production of C-terminal fragments in vivo. Moreover, when antral extracts were infused into the gastroepiploic artery, over 90% of the gastrin present in the antral venous outflow corresponded to G-17. These observations suggest that it is unlikely that enzymes involved in the generation of the C-terminal forms are located either in blood or on the luminal side of the endothelial membrane. It is proposed, then, that antral gastrin is converted into shorter C-terminal fragments at or before the time it enters the circulation and that the major storage forms of gastrin in tissue account for less than 50% of the material in the gastric venous outflow.

scholarly journals Purification and heterogeneity of inorganic pyrophosphatase of pig scapula cartilage

1975 ◽  
Vol 147 (1) ◽  
pp. 103-109 ◽  
Author(s):  
R Felix ◽  
H Fleisch
Keyword(s):  
Enzyme Activity ◽  
Ion Exchange ◽  
High Purity ◽  
Cetylpyridinium Chloride ◽  
Gel Filtration ◽  
Inorganic Pyrophosphatase ◽  
Gel Filtration Chromatography ◽  
Enzyme Preparations ◽  
Specific Activities

Inorganic pyrophosphatase (pyrophosphate phosphohydrolase; EC 3.6.1.1) was purified from pig scapula cartilage by fractionation with N-cetylpyridinium chloride and (NH4)2SO4, followed by ion-exchange and gel-filtration chromatography. Enzyme preparations of high purity were obtained, with specific activities (100-400 units/mg) higher than those previously described for mammalian pyrophosphatases. The enzyme activity could be separated into several subfractions on ion-exchange columns.

Studies on an Inhibitor of Plasminogen Activation in Human Serum

1973 ◽  
Vol 30 (02) ◽  
pp. 414-424 ◽  
Author(s):  
Ulla Hedner
Keyword(s):  
Ion Exchange ◽  
Human Serum ◽  
Antithrombin Iii ◽  
Gel Filtration ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Specific Adsorption ◽  
Partial Purification ◽  
Plasminogen Activation ◽  
Preparative Electrophoresis

SummaryA procedure is described for partial purification of an inhibitor of the activation of plasminogen by urokinase and streptokinase. The method involves specific adsorption of contammants, ion-exchange chromatography on DEAE-Sephadex, gel filtration on Sephadex G-200 and preparative electrophoresis. The inhibitor fraction contained no antiplasmin, no plasminogen, no α1-antitrypsin, no antithrombin-III and was shown not to be α2 M or inter-α-inhibitor. It contained traces of prothrombin and cerulo-plasmin. An antiserum against the inhibitor fraction capable of neutralising the inhibitor in serum was raised in rabbits.

scholarly journals Analysis of serum lipoproteins by high performance gel filtration chromatography.

1996 ◽  
Vol 45 (1) ◽  
pp. 103-106 ◽  
Author(s):  
Takashi KITAMURA ◽  
Seiji ITO ◽  
Yoshio KATO ◽  
Keiko SASAMOTO ◽  
Mitsuyo OKAZAKI
Keyword(s):  
High Performance ◽  
Gel Filtration ◽  
Serum Lipoproteins ◽  
Gel Filtration Chromatography
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