2mgt

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==Zinc induced dimer of the metal binding domain 1-16 of human amyloid beta-peptide with Alzheimer's disease pathogenic English mutation H6R==
==Zinc induced dimer of the metal binding domain 1-16 of human amyloid beta-peptide with Alzheimer's disease pathogenic English mutation H6R==
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<StructureSection load='2mgt' size='340' side='right' caption='[[2mgt]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
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<StructureSection load='2mgt' size='340' side='right'caption='[[2mgt]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2mgt]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2MGT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2MGT FirstGlance]. <br>
<table><tr><td colspan='2'>[[2mgt]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2MGT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2MGT FirstGlance]. <br>
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<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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NMR spectroscopy was recognized as a method of protein structure determination in solution. However, determination of the conformation of small peptides, which undergo fast molecular motions, remains a challenge. This is mainly caused by impossibility to collect required quantity of the distance and dihedral angle restraints from NMR spectra. At the same time, short charged peptides play an important role in a number of biological processes, in particular in pathogenesis of neurodegenerative diseases including Alzheimer's disease. Therefore development of a method for structure calculation of small peptides in a water environment using the most realistic force fields seems to be of current importance. Such algorithm has been developed using the Amber-03 force field and software package Gromacs after updating its program code. The algorithm of calculation has been verified on a model peptide for which the solution structure is known, and on the metal binding fragment of rat beta-amyloid for which structure has been determined by alternative methods. The developed algorithm substantially increases quality of structures, in particular Ramachandran plot statistics, and decreases RMSD of coordinates of atoms inside calculated family. The described protocol of calculation can be used for determination of conformation of short peptides, and also for structure optimization of larger proteins containing poorly structured fragments.
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Conformational changes of Abeta peptide result in its transformation from native monomeric state to the toxic soluble dimers, oligomers and insoluble aggregates that are hallmarks of Alzheimer's disease (AD). Interactions of zinc ions with Abeta are mediated by the N-terminal Abeta(1-16) domain and appear to play a key role in AD progression. There is a range of results indicating that these interactions trigger the Abeta plaque formation. We have determined structure and functional characteristics of the metal binding domains derived from several Abeta variants and found that their zinc-induced oligomerization is governed by conformational changes in the minimal zinc binding site 6HDSGYEVHH14. The residue H6 and segment 11EVHH14, which are part of this site are crucial for formation of the two zinc-mediated interaction interfaces in Abeta. These structural determinants can be considered as promising targets for rational design of the AD-modifying drugs aimed at blocking pathological Abeta aggregation.
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[Optimization of the methods for small peptide solution structure determination by NMR spectroscopy].,Istrate AN, Mantsyzov AB, Kozin SA, Pol'shakov VI Mol Biol (Mosk). 2010 Nov-Dec;44(6):1075-85. PMID:21290829<ref>PMID:21290829</ref>
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Interplay of histidine residues of the Alzheimer's disease Abeta peptide governs its Zn-induced oligomerization.,Istrate AN, Kozin SA, Zhokhov SS, Mantsyzov AB, Kechko OI, Pastore A, Makarov AA, Polshakov VI Sci Rep. 2016 Feb 22;6:21734. doi: 10.1038/srep21734. PMID:26898943<ref>PMID:26898943</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Large Structures]]
[[Category: Istrate, A]]
[[Category: Istrate, A]]
[[Category: Kozin, S]]
[[Category: Kozin, S]]

Revision as of 08:33, 1 January 2020

Zinc induced dimer of the metal binding domain 1-16 of human amyloid beta-peptide with Alzheimer's disease pathogenic English mutation H6R

PDB ID 2mgt

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