author_facet KERN, Andreas
EBLE, Johannes
GOLBIK, Ralph
KÜHN, Klaus
KERN, Andreas
EBLE, Johannes
GOLBIK, Ralph
KÜHN, Klaus
author KERN, Andreas
EBLE, Johannes
GOLBIK, Ralph
KÜHN, Klaus
spellingShingle KERN, Andreas
EBLE, Johannes
GOLBIK, Ralph
KÜHN, Klaus
European Journal of Biochemistry
Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
Biochemistry
author_sort kern, andreas
spelling KERN, Andreas EBLE, Johannes GOLBIK, Ralph KÜHN, Klaus 0014-2956 1432-1033 Wiley Biochemistry http://dx.doi.org/10.1111/j.1432-1033.1993.tb18017.x <jats:p>The triple‐helical cyanogen‐bromide‐derived fragment CB3[IV] of collagen IV, located 100 nm from the N‐terminus of the molecule, contains the binding sites for the integrins α1β1 and α2β1. To investigate the interaction of these integrins and collagen IV, we performed solid‐phase and inhibition assays using as receptor isolated α1β1 and α2β1. The ligands used were the binding‐site‐bearing trimeric peptide CB3[IV] and its shorter tryptic fragments F1–F4. Using titration curves, in which the binding of soluble receptors to coated ligands and the binding of soluble ligands to coated receptors were analyzed, the binding sites for α1β1 and α2β1 were in different but adjacent areas of CB3[IV]. Triple‐helical conformation and distinct primary structures were required for the interaction. Dissociation constants (<jats:italic>K</jats:italic><jats:sub>a</jats:sub>), for the affinity of integrins for collagen IV, were determined in the 1‐nM range in the presence of Mn<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup>. In the absence of Mn<jats:sup>2+</jats:sup>, the <jats:italic>K</jats:italic><jats:sub>d</jats:sub> values indicated a 30–60‐fold decrease in the affinities, which for α2β1 was further reduced by adding Ca<jats:sup>2+</jats:sup>. In the presence of Ca<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup> the affinity of collagen IV for α1β1 was four‐times higher than for α2β1.</jats:p> Interaction of type IV collagen with the isolated integrins α1β1 and α2β1 European Journal of Biochemistry
doi_str_mv 10.1111/j.1432-1033.1993.tb18017.x
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series European Journal of Biochemistry
source_id 49
title Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_unstemmed Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_full Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_fullStr Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_full_unstemmed Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_short Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_sort interaction of type iv collagen with the isolated integrins α1β1 and α2β1
topic Biochemistry
url http://dx.doi.org/10.1111/j.1432-1033.1993.tb18017.x
publishDate 1993
physical 151-159
description <jats:p>The triple‐helical cyanogen‐bromide‐derived fragment CB3[IV] of collagen IV, located 100 nm from the N‐terminus of the molecule, contains the binding sites for the integrins α1β1 and α2β1. To investigate the interaction of these integrins and collagen IV, we performed solid‐phase and inhibition assays using as receptor isolated α1β1 and α2β1. The ligands used were the binding‐site‐bearing trimeric peptide CB3[IV] and its shorter tryptic fragments F1–F4. Using titration curves, in which the binding of soluble receptors to coated ligands and the binding of soluble ligands to coated receptors were analyzed, the binding sites for α1β1 and α2β1 were in different but adjacent areas of CB3[IV]. Triple‐helical conformation and distinct primary structures were required for the interaction. Dissociation constants (<jats:italic>K</jats:italic><jats:sub>a</jats:sub>), for the affinity of integrins for collagen IV, were determined in the 1‐nM range in the presence of Mn<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup>. In the absence of Mn<jats:sup>2+</jats:sup>, the <jats:italic>K</jats:italic><jats:sub>d</jats:sub> values indicated a 30–60‐fold decrease in the affinities, which for α2β1 was further reduced by adding Ca<jats:sup>2+</jats:sup>. In the presence of Ca<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup> the affinity of collagen IV for α1β1 was four‐times higher than for α2β1.</jats:p>
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author KERN, Andreas, EBLE, Johannes, GOLBIK, Ralph, KÜHN, Klaus
author_facet KERN, Andreas, EBLE, Johannes, GOLBIK, Ralph, KÜHN, Klaus, KERN, Andreas, EBLE, Johannes, GOLBIK, Ralph, KÜHN, Klaus
author_sort kern, andreas
container_issue 1
container_start_page 151
container_title European Journal of Biochemistry
container_volume 215
description <jats:p>The triple‐helical cyanogen‐bromide‐derived fragment CB3[IV] of collagen IV, located 100 nm from the N‐terminus of the molecule, contains the binding sites for the integrins α1β1 and α2β1. To investigate the interaction of these integrins and collagen IV, we performed solid‐phase and inhibition assays using as receptor isolated α1β1 and α2β1. The ligands used were the binding‐site‐bearing trimeric peptide CB3[IV] and its shorter tryptic fragments F1–F4. Using titration curves, in which the binding of soluble receptors to coated ligands and the binding of soluble ligands to coated receptors were analyzed, the binding sites for α1β1 and α2β1 were in different but adjacent areas of CB3[IV]. Triple‐helical conformation and distinct primary structures were required for the interaction. Dissociation constants (<jats:italic>K</jats:italic><jats:sub>a</jats:sub>), for the affinity of integrins for collagen IV, were determined in the 1‐nM range in the presence of Mn<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup>. In the absence of Mn<jats:sup>2+</jats:sup>, the <jats:italic>K</jats:italic><jats:sub>d</jats:sub> values indicated a 30–60‐fold decrease in the affinities, which for α2β1 was further reduced by adding Ca<jats:sup>2+</jats:sup>. In the presence of Ca<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup> the affinity of collagen IV for α1β1 was four‐times higher than for α2β1.</jats:p>
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imprint Wiley, 1993
imprint_str_mv Wiley, 1993
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spelling KERN, Andreas EBLE, Johannes GOLBIK, Ralph KÜHN, Klaus 0014-2956 1432-1033 Wiley Biochemistry http://dx.doi.org/10.1111/j.1432-1033.1993.tb18017.x <jats:p>The triple‐helical cyanogen‐bromide‐derived fragment CB3[IV] of collagen IV, located 100 nm from the N‐terminus of the molecule, contains the binding sites for the integrins α1β1 and α2β1. To investigate the interaction of these integrins and collagen IV, we performed solid‐phase and inhibition assays using as receptor isolated α1β1 and α2β1. The ligands used were the binding‐site‐bearing trimeric peptide CB3[IV] and its shorter tryptic fragments F1–F4. Using titration curves, in which the binding of soluble receptors to coated ligands and the binding of soluble ligands to coated receptors were analyzed, the binding sites for α1β1 and α2β1 were in different but adjacent areas of CB3[IV]. Triple‐helical conformation and distinct primary structures were required for the interaction. Dissociation constants (<jats:italic>K</jats:italic><jats:sub>a</jats:sub>), for the affinity of integrins for collagen IV, were determined in the 1‐nM range in the presence of Mn<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup>. In the absence of Mn<jats:sup>2+</jats:sup>, the <jats:italic>K</jats:italic><jats:sub>d</jats:sub> values indicated a 30–60‐fold decrease in the affinities, which for α2β1 was further reduced by adding Ca<jats:sup>2+</jats:sup>. In the presence of Ca<jats:sup>2+</jats:sup> and Mg<jats:sup>2+</jats:sup> the affinity of collagen IV for α1β1 was four‐times higher than for α2β1.</jats:p> Interaction of type IV collagen with the isolated integrins α1β1 and α2β1 European Journal of Biochemistry
spellingShingle KERN, Andreas, EBLE, Johannes, GOLBIK, Ralph, KÜHN, Klaus, European Journal of Biochemistry, Interaction of type IV collagen with the isolated integrins α1β1 and α2β1, Biochemistry
title Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_full Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_fullStr Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_full_unstemmed Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_short Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
title_sort interaction of type iv collagen with the isolated integrins α1β1 and α2β1
title_unstemmed Interaction of type IV collagen with the isolated integrins α1β1 and α2β1
topic Biochemistry
url http://dx.doi.org/10.1111/j.1432-1033.1993.tb18017.x