Specific binding of interleukin 1 (IL-1)β and IL-1 receptor antagonist (IL-1ra) to human serum. High-affinity binding of IL-1ra to soluble IL-1 receptor type I

Cytokine ◽  
1993 ◽  
Vol 5 (5) ◽  
pp. 427-435 ◽  
Author(s):  
Morten Svenson ◽  
Morten Bagge Hansen ◽  
Peter Heegaard ◽  
Kathrine Abell ◽  
Klaus Bendtzen
Keyword(s):  
Human Serum ◽  
Receptor Antagonist ◽  
Specific Binding ◽  
Interleukin 1 ◽  
Receptor Type ◽  
Affinity Binding ◽  
Type I ◽  
High Affinity Binding ◽  
High Affinity

scholarly journals Identification and initial characterization of an autocrine pheromone receptor in the protozoan ciliate Euplotes raikovi.

1990 ◽  
Vol 111 (2) ◽  
pp. 607-614 ◽  
Author(s):  
C Ortenzi ◽  
C Miceli ◽  
R A Bradshaw ◽  
P Luporini
Keyword(s):  
Mating Type ◽  
Binding Sites ◽  
Specific Binding ◽  
Affinity Binding ◽  
Type I ◽  
Native Form ◽  
High Affinity Binding ◽  
High Affinity ◽  
Euplotes Raikovi ◽  
A Site

The polypeptide pheromone Er-1, purified from the ciliate Euplotes raikovi of mating type I and genotype mat-1/mat-1, was iodinated with 125I-Bolton-Hunter reagent to a sp act of 0.45-0.73 mu Ci/microgram of protein. This preparation of 125I-Er-1 bound specifically to high affinity binding sites on the same cells of mating type I. Binding of 125I-Er-1 occurred with an apparent Kd of 4.63 +/- 0.12 X 10(-9) M in cells in early stationary phase. It was estimated that these cells carry a total number of approximately 5 X 10(7) sites/cell, with a site density that falls in the range of 1,600-1,700/microns 2 of cell surface. Unlabeled Er-1, other homologous pheromones such as Er-2 and Er-10, antibodies specific for Er-1, and human IL-2 were shown to act as effective inhibitors of specific binding of 125I-Er-1 to mating type I cells. The "autocrine" nature of the identified specific high affinity binding sites for Er-1 was further substantiated by cross-linking experiments. These experiments revealed that mating type-I cell membranes contain one protein entity of Mr = 28,000 that is capable of reacting specifically with the homodimeric native form of Er-1.

scholarly journals Biological characteristics of two lysines on human serum albumin in the high-affinity binding of 4Z,15Z-bilirubin-IXα revealed by phage display

FEBS Journal ◽  
2011 ◽  
Vol 278 (21) ◽  
pp. 4100-4111 ◽  
Author(s):  
Ai Minomo ◽  
Yu Ishima ◽  
Ulrich Kragh-Hansen ◽  
Victor T. G. Chuang ◽  
Makiyo Uchida ◽  
...  
Keyword(s):  
Human Serum Albumin ◽  
Serum Albumin ◽  
Phage Display ◽  
Human Serum ◽  
Biological Characteristics ◽  
Affinity Binding ◽  
High Affinity Binding ◽  
High Affinity

IS PENTASACCHARIDE THE SMALLEST HEPARIN OLIGOSACCHARIDE WITH BINDING AFFINITY TO ANTITHROMBIN III ? AN OVERVIEW

1987 ◽  
Author(s):  
J Mardiguian
Keyword(s):  
Aqueous Medium ◽  
Uronic Acid ◽  
Antithrombin Iii ◽  
Specific Binding ◽  
Factor Xa ◽  
Benzyl Ester ◽  
Affinity Binding ◽  
High Affinity Binding ◽  
High Affinity ◽  
Convincing Data

The binding of heparin to antithrombin III is ascribed to the presence in the heparin molecule of a specific binding site which contains a typical 3-0- sulfate group located on a glucosamine residue. It has been postulated that the smallest heparin oligosaccharide capable of high affinity binding to antithrombin III and eliciting anti-factor Xa activity is a pentasaccharide containing three glucosamine units and two uronic acid residues. Such a pentasaccharide has been recently isolated after chemical depolymerization of pig mucosal heparin and its structure found to be very close to that of a synthetic pentasaccharide prepared by other investigators. However no convincing data have, so far, excluded the possibility that an oligosaccharide composed of less than five sugar units could not be able to bind to antithrombinlll and to elicit anti-factor Xa activity. We report now the isolation of new oligosaccharides obtained by beta-eliminative chemical depolymerization of heparin using three different procedures : depolymerization of heparin benzyl ester (1) in aqueous medium and (2) in non-aqueous medium: (3) alcaline depolymerization of a periodate oxydized acetyl heparin. The data reported show that the high affinity oligosaccharides isolated after affinity chromatography on immobilized antithrombin III are distinct from the previously isolated pentasaccharide and that there is some evidence that these are tetrasaccharides resulting from the cleavage of the non reducing end of the heparin molecule

Development of DNA Nanostructures for High-Affinity Binding to Human Serum Albumin

2017 ◽  
Vol 139 (21) ◽  
pp. 7355-7362 ◽  
Author(s):  
Aurélie Lacroix ◽  
Thomas G. W. Edwardson ◽  
Mark A. Hancock ◽  
Michael D. Dore ◽  
Hanadi F. Sleiman
Keyword(s):  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Affinity Binding ◽  
Dna Nanostructures ◽  
High Affinity Binding ◽  
High Affinity

Prostaglandin E2 binding sites in porcine oxyntic mucosa: effects of salicylates

1986 ◽  
Vol 64 (5) ◽  
pp. 515-520 ◽  
Author(s):  
B. L. Tepperman ◽  
B. D. Soper
Keyword(s):  
Binding Sites ◽  
Specific Binding ◽  
Prostaglandin E ◽  
Affinity Binding ◽  
Variable Degree ◽  
Single Class ◽  
Oxyntic Mucosa ◽  
High Affinity Binding ◽  
Mucosal Ulceration ◽  
High Affinity

These studies were designed to examine the changes in the characteristics of prostaglandin E2 (PGE2) binding to porcine oxyntic mucosa in the response to oral ingestion of salicylates. Either acetylsalicylic acid (ASA) or salicylic acid (SA) was administered to conscious pigs (100 mg/kg in 30 mL of an equimolar concentration of NaHCO3) once a day for 1, 3, 10, or 20 days. In control experiments a similar volume of 0.3 M NaHCO3 was administered for similar durations. Mucosal ulceration and the characteristics of the binding of [3H]PGE2 to a 30 000 × g membrane preparation of oxyntic mucosa were examined. Generation of mucosal PGE2 was measured by radioimmunoassay. ASA treatment resulted in an increase in the number and severity of mucosal ulcers and a decrease in PGE2 levels within the first treatment day. By day 20 the degree of ulceration had decreased in spite of a persistent reduction of mucosal PGE2 generation. A variable degree of ulceration was observed in SA-treated animals. In control animals only a single class of binding sites for [3H]PGE2 was evident. After 3 days of ASA treatment a second class of binding sites with a high affinity dissociation constant appeared. There was a decrease in the high affinity binding of [3H]PGE2 after 20 days of ASA ingestion. Low affinity binding was not altered. ASA treatment resulted in a significant increase in specific binding capacities for both families of binding sites. SA treatment did not consistently alter PGE2 binding characteristics from control at any time period studied. These data suggest that SA treatment results in a small degree of mucosal damage in the absence of a significant reduction in tissue generation of PGE2 or changes in PGE2 binding. Damage in response to ASA ingestion was associated with a reduction in both endogenous synthesis of PGE2 and an increase in the concentration of both low and high affinity binding sites for PGE2. The reduction in mucosal ulceration on day 20 in spite of depressed endogenous PGE2 coincides with an increase in PGE2 binding.

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