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[[Image:1c43.gif|left|200px]]


{{Structure
==MUTANT HUMAN LYSOZYME WITH FOREIGN N-TERMINAL RESIDUES==
|PDB= 1c43 |SIZE=350|CAPTION= <scene name='initialview01'>1c43</scene>, resolution 1.8&Aring;
<StructureSection load='1c43' size='340' side='right'caption='[[1c43]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND= <scene name='pdbligand=NA:SODIUM ION'>NA</scene>
<table><tr><td colspan='2'>[[1c43]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C43 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1C43 FirstGlance]. <br>
|ACTIVITY= [http://en.wikipedia.org/wiki/Lysozyme Lysozyme], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.17 3.2.1.17]  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8&#8491;</td></tr>
|GENE=  
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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=1c43 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c43 OCA], [https://pdbe.org/1c43 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1c43 RCSB], [https://www.ebi.ac.uk/pdbsum/1c43 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1c43 ProSAT]</span></td></tr>
</table>
== 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 ==
[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 ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c4/1c43_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </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/main_output.php?pdb_ID=1c43 ConSurf].
<div style="clear:both"></div>


'''MUTANT HUMAN LYSOZYME WITH FOREIGN N-TERMINAL RESIDUES'''
==See Also==
 
*[[Lysozyme 3D structures|Lysozyme 3D structures]]
 
== References ==
==Overview==
<references/>
To minutely understand the effect of foreign N-terminal residues on the conformational stability of human lysozyme, five mutant proteins were constructed: two had Met or Ala in place of the N-terminal Lys residue (K1M and K1A, respectively), and others had one additional residue, Met, Gly or Pro, to the N-terminal Lys residue (Met(-1), Gly(-1) and Pro(-1), respectively). The thermodynamic parameters for denaturation of these mutant proteins were examined by differential scanning calorimetry and were compared with that of the wild-type protein. Three mutants with the extra residue were significantly destabilized: the changes in unfolding Gibbs energy (DeltaDeltaG) were -9.1 to -12.2 kJ.mol-1. However, the stability of two single substitutions at the N-terminal slightly decreased; the DeltaDeltaG values were only -0.5 to -2.5 kJ.mol-1. The results indicate that human lysozyme is destabilized by an expanded N-terminal residue. The crystal structural analyses of K1M, K1A and Gly(-1) revealed that the introduction of a residue at the N-terminal of human lysozyme caused the destruction of hydrogen bond networks with ordered water molecules, resulting in the destabilization of the protein.
__TOC__
 
</StructureSection>
==Disease==
Known diseases associated with this structure: Amyloidosis, renal OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=153450 153450]], Microphthalmia, syndromic 1 OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=309800 309800]]
 
==About this Structure==
1C43 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C43 OCA].
 
==Reference==
Effect of foreign N-terminal residues on the conformational stability of human lysozyme., Takano K, Tsuchimori K, Yamagata Y, Yutani K, Eur J Biochem. 1999 Dec;266(2):675-82. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10561612 10561612]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Lysozyme]]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Takano K]]
[[Category: Takano, K.]]
[[Category: Tsuchimori K]]
[[Category: Tsuchimori, K.]]
[[Category: Yamagata Y]]
[[Category: Yamagata, Y.]]
[[Category: Yutani K]]
[[Category: Yutani, K.]]
[[Category: NA]]
[[Category: n-terminal]]
[[Category: stability]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:19:32 2008''

Latest revision as of 08:57, 3 April 2024

MUTANT HUMAN LYSOZYME WITH FOREIGN N-TERMINAL RESIDUESMUTANT HUMAN LYSOZYME WITH FOREIGN N-TERMINAL RESIDUES

Structural highlights

1c43 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.8Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

LYSC_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]

Function

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

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

References

  1. ↑ Pepys MB, Hawkins PN, Booth DR, Vigushin DM, Tennent GA, Soutar AK, Totty N, Nguyen O, Blake CC, Terry CJ, et al.. Human lysozyme gene mutations cause hereditary systemic amyloidosis. Nature. 1993 Apr 8;362(6420):553-7. PMID:8464497 doi:http://dx.doi.org/10.1038/362553a0

1c43, resolution 1.80Å

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