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1rex

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Revision as of 17:35, 22 January 2020

NATIVE HUMAN LYSOZYME

Structural highlights

1rex 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.
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

In order to reveal the origin of carbohydrate recognition specificity of human lysozyme by clarifying the difference in the binding mode of ligands in the active site, the inactivation of human lysozyme by 2',3'-epoxypropyl beta-glycoside derivatives of the disaccharides, N,N'-diacetylchitobiose [GlcNAc-beta-(1-->4)-GlcNAc] and N-acetyllactosamine [Gal-beta-(1-->4)-GlcNAc], was investigated and the three-dimensional structures of the affinity-labeled enzymes were determined by X-ray crystallography at 1.7 A resolution. Under the conditions comprising 2.0 x 10(-3) M labeling reagent and 1.0 x 10(-5) M human lysozyme at pH 5.4, 37 degrees C, the reaction time required to reduce the lytic activity against Micrococcus luteus cells to 50% of its initial activity was lengthened by 3.7 times through the substitution of the nonreducing end sugar residue, GlcNAc to Gal. The refined structure of human lysozyme labeled by 2',3'-epoxypropyl beta-glycoside derivatives of N,N'-diacetylchitobiose (HL/NAG-NAG-EPO complex) indicated that the interaction mode of the N,N'-diacetylchitobiose moiety in substites B and C in this study was essentially the same as in the case of the complex of human lysozyme with the free ligand. On the other hand, the hydrogen-bonding pattern and the stacking interaction at subsite B were remarkably different between the HL/NAG-NAG-EPO complex and human lysozyme labeled by the 2',3'-epoxypropyl beta-glycoside of N-acetyllactosamine (HL/GAL-NAG-EPO complex). The reduced number of possible hydrogen bonds as well as the less favorable stacking between the side chain of Tyr63 in human lysozyme and the galactose residue in the HL/GAL-NAG-EPO complex reasonably explained the less efficient ability of the 2',3'-epoxypropyl beta-glycoside of N-acetyllactosamine as compared to that of N,N'-diacetylchitobiose as an affinity labeling reagent toward human lysozyme.

Origin of carbohydrate recognition specificity of human lysozyme revealed by affinity labeling.,Muraki M, Harata K, Sugita N, Sato K Biochemistry. 1996 Oct 22;35(42):13562-7. PMID:8885835^[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
↑ Muraki M, Harata K, Sugita N, Sato K. Origin of carbohydrate recognition specificity of human lysozyme revealed by affinity labeling. Biochemistry. 1996 Oct 22;35(42):13562-7. PMID:8885835 doi:10.1021/bi9613180

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/1rex"

@@ Line 1: / Line 1: @@
 ==NATIVE HUMAN LYSOZYME==
-<StructureSection load='1rex' size='340' side='right' caption='[[1rex]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
+<StructureSection load='1rex' size='340' side='right'caption='[[1rex]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1rex]] 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=1REX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1REX FirstGlance]. <br>
@@ Line 38: / Line 38: @@
 </StructureSection>
 [[Category: Homo sapiens]]
+[[Category: Large Structures]]
 [[Category: Lysozyme]]
 [[Category: Harata, K]]

1rex

From Proteopedia

Revision as of 17:35, 22 January 2020

NATIVE HUMAN LYSOZYME

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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