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1iy4

From Proteopedia

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Revision as of 10:09, 30 October 2019

Solution structure of the human lysozyme at 35 degree C

Structural highlights

1iy4 is a 1 chain structure with sequence from Human. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1iy3
Activity:	Lysozyme, with EC number 3.2.1.17
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.

Publication Abstract from PubMed

The 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.

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
↑ Kumeta H, Miura A, Kobashigawa Y, Miura K, Oka C, Nemoto N, Nitta K, Tsuda S. Low-temperature-induced structural changes in human lysozyme elucidated by three-dimensional NMR spectroscopy. Biochemistry. 2003 Feb 11;42(5):1209-16. PMID:12564923 doi:10.1021/bi026730w

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/1iy4"

@@ Line 1: / Line 1: @@
 ==Solution structure of the human lysozyme at 35 degree C==
-<StructureSection load='1iy4' size='340' side='right' caption='[[1iy4]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
+<StructureSection load='1iy4' size='340' side='right'caption='[[1iy4]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1iy4]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IY4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1IY4 FirstGlance]. <br>
@@ Line 39: / Line 39: @@
 </StructureSection>
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Lysozyme]]
 [[Category: Kobashigawa, Y]]

1iy4

From Proteopedia

Revision as of 10:09, 30 October 2019

Solution structure of the human lysozyme at 35 degree C

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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