1iy3: Difference between revisions
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==Solution Structure of the Human lysozyme at 4 degree C== | ==Solution Structure of the Human lysozyme at 4 degree C== | ||
<StructureSection load='1iy3' size='340' side='right'caption='[[1iy3 | <StructureSection load='1iy3' size='340' side='right'caption='[[1iy3]]' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1iy3]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1iy3]] 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=1IY3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1IY3 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</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=1iy3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1iy3 OCA], [https://pdbe.org/1iy3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1iy3 RCSB], [https://www.ebi.ac.uk/pdbsum/1iy3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1iy3 ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Disease == | == Disease == | ||
[ | [https://www.uniprot.org/uniprot/LYSC_HUMAN LYSC_HUMAN] Defects in LYZ are a cause of amyloidosis type 8 (AMYL8) [MIM:[https://omim.org/entry/105200 105200]; also known as systemic non-neuropathic amyloidosis or Ostertag-type amyloidosis. AMYL8 is a hereditary generalized amyloidosis due to deposition of apolipoprotein A1, fibrinogen and lysozyme amyloids. Viscera are particularly affected. There is no involvement of the nervous system. Clinical features include renal amyloidosis resulting in nephrotic syndrome, arterial hypertension, hepatosplenomegaly, cholestasis, petechial skin rash.<ref>PMID:8464497</ref> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/LYSC_HUMAN LYSC_HUMAN] Lysozymes have primarily a bacteriolytic function; those in tissues and body fluids are associated with the monocyte-macrophage system and enhance the activity of immunoagents. | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Homo sapiens]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Kobashigawa Y]] | |||
[[Category: Kobashigawa | [[Category: Kumeta H]] | ||
[[Category: Kumeta | [[Category: Miura A]] | ||
[[Category: Miura | [[Category: Miura K]] | ||
[[Category: Miura | [[Category: Nemoto N]] | ||
[[Category: Nemoto | [[Category: Nitta K]] | ||
[[Category: Nitta | [[Category: Oka C]] | ||
[[Category: Oka | [[Category: Tsuda S]] | ||
[[Category: Tsuda | |||
Latest revision as of 02:39, 28 December 2023
Solution Structure of the Human lysozyme at 4 degree CSolution Structure of the Human lysozyme at 4 degree C
Structural highlights
DiseaseLYSC_HUMAN Defects in LYZ are a cause of amyloidosis type 8 (AMYL8) [MIM:105200; also known as systemic non-neuropathic amyloidosis or Ostertag-type amyloidosis. AMYL8 is a hereditary generalized amyloidosis due to deposition of apolipoprotein A1, fibrinogen and lysozyme amyloids. Viscera are particularly affected. There is no involvement of the nervous system. Clinical features include renal amyloidosis resulting in nephrotic syndrome, arterial hypertension, hepatosplenomegaly, cholestasis, petechial skin rash.[1] FunctionLYSC_HUMAN Lysozymes have primarily a bacteriolytic function; those in tissues and body fluids are associated with the monocyte-macrophage system and enhance the activity of immunoagents. 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 three-dimensional solution structures of human lysozyme were determined at 35 and 4 degrees C using the heteronuclear multidimensional NMR spectroscopy, which were compared with each other to clarify the structural response of this enzyme to lowering of the temperature. Together with the data of the temperature dependence experiments of the lytic activity against Micrococcus luteus, we consider the implication of the observed structural change for the low-temperature-induced reduction of the activity of human lysozyme. The structures of human lysozyme determined at the two temperatures are found to be similar, both of which comprise four alpha-helices (A- to D-helices) and three antiparallel beta-strands (beta(1)-beta(3)), leading to the constructions of the alpha- and beta-domains as previously identified in the X-ray crystal structure. A significant structural change was observed for the "active site lobe" comprising the loop region connecting C- and D-helices and the following D-helix, which moves toward the active site cleft located between the alpha- and beta-domains so as to obstruct the cleft according to the temperature lowering. It further appeared that the total volume as well as the accessible surface area of human lysozyme decreases with lowering of the temperature, suggesting that the internal cavity of this enzyme shrinks under low temperature environment. Because in human lysozyme the region comprising the active site lobe is responsible for turnover of the enzymatic reaction against the substrate, the low-temperature-induced structural change of the active site lobe presumably controls the efficiency of the lytic activity under low temperatures. Low-temperature-induced structural changes in human lysozyme elucidated by three-dimensional NMR spectroscopy.,Kumeta H, Miura A, Kobashigawa Y, Miura K, Oka C, Nemoto N, Nitta K, Tsuda S Biochemistry. 2003 Feb 11;42(5):1209-16. PMID:12564923[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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