| pubmed-article:12202360 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:12202360 | lifeskim:mentions | umls-concept:C0018165 | lld:lifeskim |
| pubmed-article:12202360 | lifeskim:mentions | umls-concept:C0022023 | lld:lifeskim |
| pubmed-article:12202360 | lifeskim:mentions | umls-concept:C0376534 | lld:lifeskim |
| pubmed-article:12202360 | lifeskim:mentions | umls-concept:C0439799 | lld:lifeskim |
| pubmed-article:12202360 | pubmed:issue | 3 | lld:pubmed |
| pubmed-article:12202360 | pubmed:dateCreated | 2002-8-30 | lld:pubmed |
| pubmed-article:12202360 | pubmed:abstractText | We investigate the validity of continuum electrostatics in the gramicidin A channel using a recently determined high-resolution structure. The potential and electric field acting on ions in and around the channel are computed by solving Poisson's equation. These are then used in Brownian dynamics simulations to obtain concentration profiles and the current passing through the channel. We show that regardless of the effective dielectric constant used for water in the channel or the channel protein, it is not possible to reproduce all the experimental data on gramicidin A; thus, continuum electrostatics cannot provide a valid framework for the description of ion dynamics in gramicidin channels. Using experimental data and molecular dynamics simulations as guides, we have constructed potential energy profiles that can satisfactorily describe the available physiological data. These profiles provide useful benchmarks for future potential of mean force calculations of permeating ions from molecular dynamics simulations of gramicidin A. They also offer a convenient starting point for studying structure-function relationships in modified gramicidin channels. | lld:pubmed |
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| pubmed-article:12202360 | pubmed:language | eng | lld:pubmed |
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| pubmed-article:12202360 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:12202360 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:12202360 | pubmed:month | Sep | lld:pubmed |
| pubmed-article:12202360 | pubmed:issn | 0006-3495 | lld:pubmed |
| pubmed-article:12202360 | pubmed:author | pubmed-author:ChungShin-HoS... | lld:pubmed |
| pubmed-article:12202360 | pubmed:author | pubmed-author:KuyucakSerdar... | lld:pubmed |
| pubmed-article:12202360 | pubmed:author | pubmed-author:CorryBenB | lld:pubmed |
| pubmed-article:12202360 | pubmed:author | pubmed-author:EdwardsScottS | lld:pubmed |
| pubmed-article:12202360 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:12202360 | pubmed:volume | 83 | lld:pubmed |
| pubmed-article:12202360 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:12202360 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:12202360 | pubmed:pagination | 1348-60 | lld:pubmed |
| pubmed-article:12202360 | pubmed:dateRevised | 2010-9-14 | lld:pubmed |
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| pubmed-article:12202360 | pubmed:meshHeading | pubmed-meshheading:12202360... | lld:pubmed |
| pubmed-article:12202360 | pubmed:year | 2002 | lld:pubmed |
| pubmed-article:12202360 | pubmed:articleTitle | Continuum electrostatics fails to describe ion permeation in the gramicidin channel. | lld:pubmed |
| pubmed-article:12202360 | pubmed:affiliation | Protein Dynamics Unit, Department of Physics, Faculty of Science, Australian National University, Canberra, A.C.T. 0200, Australia. | lld:pubmed |
| pubmed-article:12202360 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:12202360 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
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