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| | <StructureSection load='1ck4' size='340' side='right'caption='[[1ck4]], [[Resolution|resolution]] 2.20Å' scene=''> | | <StructureSection load='1ck4' size='340' side='right'caption='[[1ck4]], [[Resolution|resolution]] 2.20Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1ck4]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CK4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CK4 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1ck4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CK4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CK4 FirstGlance]. <br> |
| - | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ck4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ck4 OCA], [http://pdbe.org/1ck4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ck4 RCSB], [http://www.ebi.ac.uk/pdbsum/1ck4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ck4 ProSAT]</span></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> |
| | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ck4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ck4 OCA], [https://pdbe.org/1ck4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ck4 RCSB], [https://www.ebi.ac.uk/pdbsum/1ck4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ck4 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/ITA1_RAT ITA1_RAT]] Integrin alpha-1/beta-1 is a receptor for laminin and collagen. It recognizes the proline-hydroxylated sequence G-F-P-G-E-R in collagen. | + | [https://www.uniprot.org/uniprot/ITA1_RAT ITA1_RAT] Integrin alpha-1/beta-1 is a receptor for laminin and collagen. It recognizes the proline-hydroxylated sequence G-F-P-G-E-R in collagen. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Integrin|Integrin]] | + | *[[Integrin 3D structures|Integrin 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Buffalo rat]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Gotwals, P J]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Karpusas, M]] | + | [[Category: Gotwals PJ]] |
| - | [[Category: Koteliansky, V]] | + | [[Category: Karpusas M]] |
| - | [[Category: Nolte, M]] | + | [[Category: Koteliansky V]] |
| - | [[Category: Pepinsky, R B]] | + | [[Category: Nolte M]] |
| - | [[Category: Venyaminov, S Y]] | + | [[Category: Pepinsky RB]] |
| - | [[Category: Adhesion]]
| + | [[Category: Venyaminov SY]] |
| - | [[Category: Collagen]]
| + | |
| - | [[Category: I-domain]]
| + | |
| - | [[Category: Metal binding]]
| + | |
| - | [[Category: Structural protein]]
| + | |
| Structural highlights
Function
ITA1_RAT Integrin alpha-1/beta-1 is a receptor for laminin and collagen. It recognizes the proline-hydroxylated sequence G-F-P-G-E-R in collagen.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The alpha1beta1 integrin is a major cell surface receptor for collagen. Ligand binding is mediated, in part, through a 200 amino acid inserted 'I'-domain contained in the extracellular part of the integrin alpha chain. Integrin I-domains contain a divalent cation binding (MIDAS) site and require cations to interact with integrin ligands. We have determined the crystal structure of recombinant I-domain from the rat alpha1beta1 integrin at 2.2 A resolution in the absence of divalent cations. The alpha1 I-domain adopts the dinucleotide binding fold that is characteristic of all I-domain structures that have been solved to date and has a structure very similar to that of the closely related alpha2beta1 I-domain which also mediates collagen binding. A unique feature of the alpha1 I-domain crystal structure is that the MIDAS site is occupied by an arginine side chain from another I-domain molecule in the crystal, in place of a metal ion. This interaction supports a proposed model for ligand-induced displacement of metal ions. Circular dichroism spectra determined in the presence of Ca2+, Mg2+ and Mn2+ indicate that no changes in the structure of the I-domain occur upon metal ion binding in solution. Metal ion binding induces small changes in UV absorption spectra, indicating a change in the polarity of the MIDAS site environment.
Crystal structure of the alpha1beta1 integrin I-domain: insights into integrin I-domain function.,Nolte M, Pepinsky RB, Venyaminov SYu, Koteliansky V, Gotwals PJ, Karpusas M FEBS Lett. 1999 Jun 11;452(3):379-85. PMID:10386626[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Nolte M, Pepinsky RB, Venyaminov SYu, Koteliansky V, Gotwals PJ, Karpusas M. Crystal structure of the alpha1beta1 integrin I-domain: insights into integrin I-domain function. FEBS Lett. 1999 Jun 11;452(3):379-85. PMID:10386626
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