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==SOLUTION STRUCTURE OF THE HUMAN ALPHA3-CHAIN TYPE VI COLLAGEN C-TERMINAL KUNITZ DOMAIN, NMR, 20 STRUCTURES== | ==SOLUTION STRUCTURE OF THE HUMAN ALPHA3-CHAIN TYPE VI COLLAGEN C-TERMINAL KUNITZ DOMAIN, NMR, 20 STRUCTURES== | ||
<StructureSection load='1kun' size='340' side='right' caption='[[1kun | <StructureSection load='1kun' size='340' side='right'caption='[[1kun]]' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1kun]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1kun]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KUN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KUN FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 20 models</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1kun FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kun OCA], [https://pdbe.org/1kun PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kun RCSB], [https://www.ebi.ac.uk/pdbsum/1kun PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kun ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Disease == | == Disease == | ||
[ | [https://www.uniprot.org/uniprot/CO6A3_HUMAN CO6A3_HUMAN] Defects in COL6A3 are a cause of Bethlem myopathy (BM) [MIM:[https://omim.org/entry/158810 158810]. BM is a rare autosomal dominant proximal myopathy characterized by early childhood onset (complete penetrance by the age of 5) and joint contractures most frequently affecting the elbows and ankles.<ref>PMID:11992252</ref> <ref>PMID:9536084</ref> <ref>PMID:10399756</ref> <ref>PMID:15689448</ref> <ref>PMID:17886299</ref> Defects in COL6A3 are a cause of Ullrich congenital muscular dystrophy (UCMD) [MIM:[https://omim.org/entry/254090 254090]; also known as Ullrich scleroatonic muscular dystrophy. UCMD is an autosomal recessive congenital myopathy characterized by muscle weakness and multiple joint contractures, generally noted at birth or early infancy. The clinical course is more severe than in Bethlem myopathy.<ref>PMID:11992252</ref> <ref>PMID:15689448</ref> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/CO6A3_HUMAN CO6A3_HUMAN] Collagen VI acts as a cell-binding protein. | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ku/1kun_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ku/1kun_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1kun ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
| Line 28: | Line 29: | ||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 1kun" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Collagen|Collagen]] | *[[Collagen 3D structures|Collagen 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 36: | Line 38: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Bjorn | [[Category: Large Structures]] | ||
[[Category: James | [[Category: Bjorn S]] | ||
[[Category: Led | [[Category: James TL]] | ||
[[Category: Norris | [[Category: Led JJ]] | ||
[[Category: Olsen | [[Category: Norris K]] | ||
[[Category: Petersen | [[Category: Olsen O]] | ||
[[Category: Sorensen | [[Category: Petersen L]] | ||
[[Category: Sorensen MD]] | |||
Latest revision as of 07:40, 17 October 2024
SOLUTION STRUCTURE OF THE HUMAN ALPHA3-CHAIN TYPE VI COLLAGEN C-TERMINAL KUNITZ DOMAIN, NMR, 20 STRUCTURESSOLUTION STRUCTURE OF THE HUMAN ALPHA3-CHAIN TYPE VI COLLAGEN C-TERMINAL KUNITZ DOMAIN, NMR, 20 STRUCTURES
Structural highlights
DiseaseCO6A3_HUMAN Defects in COL6A3 are a cause of Bethlem myopathy (BM) [MIM:158810. BM is a rare autosomal dominant proximal myopathy characterized by early childhood onset (complete penetrance by the age of 5) and joint contractures most frequently affecting the elbows and ankles.[1] [2] [3] [4] [5] Defects in COL6A3 are a cause of Ullrich congenital muscular dystrophy (UCMD) [MIM:254090; also known as Ullrich scleroatonic muscular dystrophy. UCMD is an autosomal recessive congenital myopathy characterized by muscle weakness and multiple joint contractures, generally noted at birth or early infancy. The clinical course is more severe than in Bethlem myopathy.[6] [7] FunctionCO6A3_HUMAN Collagen VI acts as a cell-binding protein. 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 PubMedThe solution structure and backbone dynamics of the 58-residue C-terminal Kunitz domain fragment [alpha3(VI)] of human alpha3-chain type VI collagen has been studied by two-dimensional 1H-1H and 1H-15N nuclear magnetic resonance spectroscopy at 303 K. The solution structure is represented by an ensemble of 20 structures calculated with X-PLOR using 612 distance and 47 dihedral angle restraints. The distance restraints were obtained by a complete relaxation matrix analysis using MARDIGRAS. The root mean squared (rms) deviation is 0.91 A for the backbone atoms of the residues Thr2(8)-Gly12(18), Arg15(21)-Tyr35(41), and Gly40(46)-Pro57(63). The central beta-sheet [residues Ile18(24)-Tyr35(41)] and the C-terminal alpha-helix [residues Gln48(54)-Cys55(61)] are better defined with a backbone rms deviation of 0.46 A. The solution structure of alpha3(VI) is virtually identical to the crystal structure of alpha3(VI) and to the solution structure of bovine pancreatic trypsin inhibitor (BPTI). The 15N spin-lattice and spin-spin relaxation rates and the 1H-15N heteronuclear nuclear Overhauser enhancement (NOE) were analyzed using both the "model-free" formalism [Lipari, G., & Szabo, A. (1982) J. Am. Chem. Soc. 104, 4546-4559 and 4559-4570] and the reduced spectral density mapping procedure [Farrow, N. A., Szabo, A., Torchia, D. A., & Kay, L. E. (1995) J. Biomol.NMR 6, 153-162]. The results obtained from the "model-free" analysis include an overall correlation time tauc of 3. 00 ns and backbone order parameters S2 in the range from 0.28 to 0. 93. The necessity of including an exchange term in the analysis of the relaxation data from 14 residues indicated that these residues are involved in motions on the micro- to millisecond time scale. The majority of the 14 residues are located in the vicinity of the Cys14(20)-Cys38(44) disulfide bond, suggesting the presence of a disulfide bond isomerization similar to the one observed in BPTI [Otting, G., Liepinsh, E., & Wuthrich, K. (1993) Biochemistry 32, 3571-3582]. It is suggested that this disulfide bond isomerization is the main reason for the surprisingly small effect on trypsin inhibition observed when Thr13(19) of alpha3(VI) is substituted with Pro. Solution structure and backbone dynamics of the human alpha3-chain type VI collagen C-terminal Kunitz domain,.,Sorensen MD, Bjorn S, Norris K, Olsen O, Petersen L, James TL, Led JJ Biochemistry. 1997 Aug 26;36(34):10439-50. PMID:9265624[8] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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