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Carbon nanotube as a gramicidin analogue

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dc.contributor.authorHilder, Tamsyn
dc.contributor.authorChung, Shin-Ho
dc.date.accessioned2015-12-10T23:18:11Z
dc.date.issued2011
dc.date.updated2016-02-24T08:09:14Z
dc.description.abstractWe have designed a carbon nanotube that is selectively permeable to monovalent cations, binds divalent cations and rejects anions. The nanotubes, with an effective radius of 4.53 and length of 36 , are terminated with hydrogen atoms and are exohydrogenated in two regions near the entrance and exit. Using molecular and stochastic dynamics simulations we examine the free energy, current-voltage-concentration profiles and ion binding sites. The characteristics of this channel are comparable to the antibiotic gramicidin-A, but the potassium current is six times larger. At 40 mM calcium concentration the current is reduced from 26 pA to 4 pA due to a calcium ion binding at the channel entrance.
dc.identifier.issn0009-2614
dc.identifier.urihttp://hdl.handle.net/1885/65512
dc.publisherElsevier
dc.sourceChemical Physics Letters
dc.subjectKeywords: Calcium concentration; Calcium ions; Channel entrances; Concentration profiles; Current voltage; Divalent cation; Effective radius; Hydrogen atoms; Ion binding sites; Monovalent cations; Potassium currents; Stochastic dynamics; Binding sites; Biochemistry
dc.titleCarbon nanotube as a gramicidin analogue
dc.typeJournal article
local.bibliographicCitation.issue4-6
local.bibliographicCitation.lastpage426
local.bibliographicCitation.startpage423
local.contributor.affiliationHilder, Tamsyn, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationChung, Shin-Ho, College of Medicine, Biology and Environment, ANU
local.contributor.authoruidHilder, Tamsyn, u4594267
local.contributor.authoruidChung, Shin-Ho, u8809509
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor100499 - Medical Biotechnology not elsewhere classified
local.identifier.absfor100703 - Nanobiotechnology
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
local.identifier.absseo970109 - Expanding Knowledge in Engineering
local.identifier.absseo970110 - Expanding Knowledge in Technology
local.identifier.ariespublicationf2965xPUB1117
local.identifier.citationvolume501
local.identifier.doi10.1016/j.cplett.2010.11.034
local.identifier.scopusID2-s2.0-78650827013
local.identifier.thomsonID000285829300052
local.type.statusPublished Version

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