1rm9: Difference between revisions
New page: left|200px<br /><applet load="1rm9" size="450" color="white" frame="true" align="right" spinBox="true" caption="1rm9, resolution 2.90Å" /> '''Probing the Role of ... |
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[[Image:1rm9.gif|left|200px]]<br /><applet load="1rm9" size=" | [[Image:1rm9.gif|left|200px]]<br /><applet load="1rm9" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="1rm9, resolution 2.90Å" /> | caption="1rm9, resolution 2.90Å" /> | ||
'''Probing the Role of Tryptophans in Aequorea Victoria Green Fluorescent Proteins with an Expanded Genetic Code'''<br /> | '''Probing the Role of Tryptophans in Aequorea Victoria Green Fluorescent Proteins with an Expanded Genetic Code'''<br /> | ||
==Overview== | ==Overview== | ||
The expanded genetic code in combination with site-directed mutagenesis | The expanded genetic code in combination with site-directed mutagenesis was used to probe spectroscopic and structural roles of tryptophan (Trp) residues in Aequorea victoria green fluorescent proteins (avGFPs). Nine different halogen-, chalcogen-, and methyl-containing Trp isosteric analogues and surrogates were incorporated into avGFPs containing indole moieties in, and outside of, the chromophore, by the use of the selective pressure incorporation method. Such isosteric replacements introduced minimal local geometry changes in indole moieties, often to the level of single atomic exchange ('atomic mutation') and do not affect three-dimensional structures of avGFPs but induce changes in spectral properties. Our approach offers a new platform to re-evaluate issues like resonance transfer, mechanisms of chromophore formation and maturation, as well as the importance of local geometry and weak sulphur-aromatic interactions for avGFP spectral properties and structural stability. The library of novel tailor-made avGFP mutants and variants generated in this work has demonstrated not only the potentials of the expanded genetic code to study spectroscopic functions, but also a new approach to generate tailor-made proteins with interesting and useful spectral properties. | ||
==About this Structure== | ==About this Structure== | ||
1RM9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria]. Full crystallographic information is available from [http:// | 1RM9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Aequorea_victoria Aequorea victoria]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RM9 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Alefelder, S.]] | [[Category: Alefelder, S.]] | ||
[[Category: Bae, J | [[Category: Bae, J H.]] | ||
[[Category: Birle, P.]] | [[Category: Birle, P.]] | ||
[[Category: Budisa, N.]] | [[Category: Budisa, N.]] | ||
[[Category: Krywcun, T.]] | [[Category: Krywcun, T.]] | ||
[[Category: Pal, P | [[Category: Pal, P P.]] | ||
[[Category: Rubini, M.]] | [[Category: Rubini, M.]] | ||
[[Category: Steiner, T.]] | [[Category: Steiner, T.]] | ||
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[[Category: beta-barrel; gfp; noncanonical amino acid]] | [[Category: beta-barrel; gfp; noncanonical amino acid]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:52:22 2008'' | ||
Revision as of 15:52, 21 February 2008
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Probing the Role of Tryptophans in Aequorea Victoria Green Fluorescent Proteins with an Expanded Genetic Code
OverviewOverview
The expanded genetic code in combination with site-directed mutagenesis was used to probe spectroscopic and structural roles of tryptophan (Trp) residues in Aequorea victoria green fluorescent proteins (avGFPs). Nine different halogen-, chalcogen-, and methyl-containing Trp isosteric analogues and surrogates were incorporated into avGFPs containing indole moieties in, and outside of, the chromophore, by the use of the selective pressure incorporation method. Such isosteric replacements introduced minimal local geometry changes in indole moieties, often to the level of single atomic exchange ('atomic mutation') and do not affect three-dimensional structures of avGFPs but induce changes in spectral properties. Our approach offers a new platform to re-evaluate issues like resonance transfer, mechanisms of chromophore formation and maturation, as well as the importance of local geometry and weak sulphur-aromatic interactions for avGFP spectral properties and structural stability. The library of novel tailor-made avGFP mutants and variants generated in this work has demonstrated not only the potentials of the expanded genetic code to study spectroscopic functions, but also a new approach to generate tailor-made proteins with interesting and useful spectral properties.
About this StructureAbout this Structure
1RM9 is a Single protein structure of sequence from Aequorea victoria. Full crystallographic information is available from OCA.
ReferenceReference
Probing the role of tryptophans in Aequorea victoria green fluorescent proteins with an expanded genetic code., Budisa N, Pal PP, Alefelder S, Birle P, Krywcun T, Rubini M, Wenger W, Bae JH, Steiner T, Biol Chem. 2004 Feb;385(2):191-202. PMID:15101562
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