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1lhk

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Revision as of 23:55, 11 September 2015

ROLE OF PROLINE RESIDUES IN HUMAN LYSOZYME STABILITY: A SCANNING CALORIMETRIC STUDY COMBINED WITH X-RAY STRUCTURE ANALYSIS OF PROLINE MUTANTS

Structural highlights

1lhk is a 1 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Activity:	Lysozyme, with EC number 3.2.1.17
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

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.

Publication Abstract from PubMed

It has been shown that protein stability can be modulated from site-directed mutations that affect the entropy of protein unfolding [Matthews, B. W., Nicholson, H., & Becktel, W. J. (1987) Proc. Natl. Acad. Sci. U.S.A. 84, 6663-6667]. However, the effect of a specific amino acid replacement on stability highly depends on the location of the mutation site and its environment in the protein structure [Yutani, K., Hayashi, S., Sugisaki, Y., & Ogasahara, K. (1991) Proteins Struct., Funct., Genet. 9, 90-98). To clarify the role of specific proline residues in the thermostability of human lysozyme (h-lysozyme), a series of proline mutants were investigated by means of scanning calorimetry and high-resolution X-ray crystallography. The thermodynamic properties of the mutant and wild-type h-lysozymes are compared and discussed on the basis of their three-dimensional structure. h-Lysozyme contains two proline residues at positions 71 and 103. The Pro71----Gly substitution was found to destabilize h-lysozyme by decreasing the entropic contribution of unfolding by about 2 kcal/mol at 68.8 degrees C. This is consistent with the theoretical expectations for such a substitution. However, the same substitution at position 103 (Pro103----Gly) does not affect h-lysozyme stability, and the thermodynamic properties of the P71G/P103G and P71G mutants are essentially the same. Pro71 which is conserved among lysozymes from other species, appears to be important for stability, whereas Pro103, which is not conserved, does not. These differences are explained in terms of residue accessibility to the solvent and crystallographic B-factor, which reflects the amino acid mobility.(ABSTRACT TRUNCATED AT 250 WORDS)

Role of proline residues in human lysozyme stability: a scanning calorimetric study combined with X-ray structure analysis of proline mutants.,Herning T, Yutani K, Inaka K, Kuroki R, Matsushima M, Kikuchi M Biochemistry. 1992 Aug 11;31(31):7077-85. PMID:1643041^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ 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
↑ Herning T, Yutani K, Inaka K, Kuroki R, Matsushima M, Kikuchi M. Role of proline residues in human lysozyme stability: a scanning calorimetric study combined with X-ray structure analysis of proline mutants. Biochemistry. 1992 Aug 11;31(31):7077-85. PMID:1643041

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 See Also
7 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1lhk"

@@ Line 2: / Line 2: @@
 <StructureSection load='1lhk' size='340' side='right' caption='[[1lhk]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1lhk]] is a 1 chain structure with 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=1LHK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LHK FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1lhk]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LHK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LHK FirstGlance]. <br>
 </td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[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] </span></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=1lhk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lhk OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1lhk RCSB], [http://www.ebi.ac.uk/pdbsum/1lhk PDBsum]</span></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=1lhk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lhk OCA], [http://pdbe.org/1lhk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1lhk RCSB], [http://www.ebi.ac.uk/pdbsum/1lhk PDBsum]</span></td></tr>
 </table>
 == Disease ==
@@ Line 28: / Line 28: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1lhk" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 35: / Line 36: @@
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Lysozyme]]
 [[Category: Herning, T]]

1lhk

From Proteopedia

Revision as of 23:55, 11 September 2015

ROLE OF PROLINE RESIDUES IN HUMAN LYSOZYME STABILITY: A SCANNING CALORIMETRIC STUDY COMBINED WITH X-RAY STRUCTURE ANALYSIS OF PROLINE MUTANTS

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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