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1t55
From Proteopedia
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| - | [[Image:1t55.gif|left|200px]] | + | [[Image:1t55.gif|left|200px]] |
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| - | '''Antibiotic Activity and Structural Analysis of a Scorpion-derived Antimicrobial peptide IsCT and Its Analogs''' | + | {{Structure |
| + | |PDB= 1t55 |SIZE=350|CAPTION= <scene name='initialview01'>1t55</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=NH2:AMINO GROUP'>NH2</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''Antibiotic Activity and Structural Analysis of a Scorpion-derived Antimicrobial peptide IsCT and Its Analogs''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1T55 is a [ | + | 1T55 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Opisthacanthus_madagascariensis Opisthacanthus madagascariensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T55 OCA]. |
==Reference== | ==Reference== | ||
| - | Antibiotic activity and structural analysis of the scorpion-derived antimicrobial peptide IsCT and its analogs., Lee K, Shin SY, Kim K, Lim SS, Hahm KS, Kim Y, Biochem Biophys Res Commun. 2004 Oct 15;323(2):712-9. PMID:[http:// | + | Antibiotic activity and structural analysis of the scorpion-derived antimicrobial peptide IsCT and its analogs., Lee K, Shin SY, Kim K, Lim SS, Hahm KS, Kim Y, Biochem Biophys Res Commun. 2004 Oct 15;323(2):712-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15369808 15369808] |
[[Category: Opisthacanthus madagascariensis]] | [[Category: Opisthacanthus madagascariensis]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: coil-helix]] | [[Category: coil-helix]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:13:56 2008'' |
Revision as of 12:13, 20 March 2008
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Antibiotic Activity and Structural Analysis of a Scorpion-derived Antimicrobial peptide IsCT and Its Analogs
Overview
IsCT is a non-cell-selective antimicrobial peptide isolated from the scorpion Opisthacanthus madagascariensis that has potent cytolytic activity against both mammalian and bacterial cells. To investigate the structure-activity relationships of IsCT and to design novel peptide antibiotics with bacterial cell selectivity, we synthesized several analogs of IsCT and determined their three-dimensional structures in solution by 2D-NMR spectroscopy. IsCT has a linear alpha-helical structure from Gly3 to Phe13, and [K7]-IsCT has a linear alpha-helical structure from Leu2 to Phe13. [K7, P8, K11]-IsCT, which has a bend in its middle region, exhibited the highest antibacterial activity without hemolytic activity, suggesting that its proline-induced bend is an important determinant of this selectivity. Tryptophan fluorescence showed that the high selectivity of [K7, P8, K11]-IsCT toward bacterial cells is closely correlated with its highly selective interaction with negatively charged phospholipids. Its potent activity against antibiotic-resistant bacteria suggests that [K7, P8, K11]-IsCT may serve as a promising lead candidate in the development of new peptide antibiotics.
About this Structure
1T55 is a Single protein structure of sequence from Opisthacanthus madagascariensis. Full crystallographic information is available from OCA.
Reference
Antibiotic activity and structural analysis of the scorpion-derived antimicrobial peptide IsCT and its analogs., Lee K, Shin SY, Kim K, Lim SS, Hahm KS, Kim Y, Biochem Biophys Res Commun. 2004 Oct 15;323(2):712-9. PMID:15369808
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