A helix-induced oligomeric transition of gaegurin 4, an antimicrobial peptide isolated from a Korean frog

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dc.contributor.authorS Y Eun-
dc.contributor.authorH K Jang-
dc.contributor.authorS K Han-
dc.contributor.authorP D Ryu-
dc.contributor.authorB J Lee-
dc.contributor.authorKyou Hoon Han-
dc.contributor.authorS J Kim-
dc.date.accessioned2017-04-19T09:04:27Z-
dc.date.available2017-04-19T09:04:27Z-
dc.date.issued2006-
dc.identifier.issn1016-8478-
dc.identifier.urihttps://oak.kribb.re.kr/handle/201005/7404-
dc.description.abstractGaegurin 4 (GGN4), a novel peptide isolated from the skin of a Korean frog, Rana rugosa, has broad spectrum antimicrobial activity. A number of amphipathic peptides closely related to GGN4 undergo a coil to helix transition with concomitant oligomerization in lipid membranes or membrane-mimicking environments. Despite intensive study of their secondary structures, the oligomeric states of the peptides before and after the transition are not well understood. To clarify the structural basis of its antibiotic action, we used analytical ultracentrifugation to define the aggregation state of GGN4 in water, ethyl alcohol, and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). The maximum size of GGN4 in 15% HFIP corresponded to a decamer, whereas it was monomeric in buffer. The oligomeric transition is accompanied by a cooperative 9 nm blue-shift of maximum fluorescence emission and a large secondary structure change from an almost random coil to an α-helical structure. GGN4 induces pores in lipid membranes and, using electrophysiological methods, we estimated the diameter of the pores to be exceed 7.3 ?, which suggests that the minimal oligomer structure responsible is a pentamer.-
dc.publisherKorea Soc-Assoc-Inst-
dc.titleA helix-induced oligomeric transition of gaegurin 4, an antimicrobial peptide isolated from a Korean frog-
dc.title.alternativeA helix-induced oligomeric transition of gaegurin 4, an antimicrobial peptide isolated from a Korean frog-
dc.typeArticle-
dc.citation.titleMolecules and Cells-
dc.citation.number2-
dc.citation.endPage236-
dc.citation.startPage229-
dc.citation.volume21-
dc.contributor.affiliatedAuthorKyou Hoon Han-
dc.contributor.alternativeName은수용-
dc.contributor.alternativeName장해경-
dc.contributor.alternativeName한성규-
dc.contributor.alternativeName류판동-
dc.contributor.alternativeName이병재-
dc.contributor.alternativeName한규훈-
dc.contributor.alternativeName김순종-
dc.identifier.bibliographicCitationMolecules and Cells, vol. 21, no. 2, pp. 229-236-
dc.subject.keywordaggregation state-
dc.subject.keywordanalytical ultracentrifuge-
dc.subject.keywordantimicrobial peptide-
dc.subject.keywordgaegurin 4-
dc.subject.localaggregation state-
dc.subject.localanalytical ultracentrifuge-
dc.subject.localAntimicrobial peptide-
dc.subject.localanti-microbial peptides-
dc.subject.localantimicrobial peptide-
dc.subject.localantimicrobial peptides-
dc.subject.localAntimicrobial peptides-
dc.subject.localgaegurin 4-
dc.description.journalClassY-
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