4cs2: Difference between revisions
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<StructureSection load='4cs2' size='340' side='right' caption='[[4cs2]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='4cs2' size='340' side='right' caption='[[4cs2]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
[[4cs2]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4CS2 OCA]. <br> | <table><tr><td colspan='2'>[[4cs2]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4CS2 OCA]. <br> | ||
<b>[[Ligand|Ligands:]]</b> <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene><br> | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene><br> | ||
<b>Activity:</b> <span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucokinase Glucokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.2 2.7.1.2] </span>< | <tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucokinase Glucokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.2 2.7.1.2] </span></td></tr> | ||
<b>Resources:</b> <span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4cs2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cs2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4cs2 RCSB], [http://www.ebi.ac.uk/pdbsum/4cs2 PDBsum]</span>< | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4cs2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4cs2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4cs2 RCSB], [http://www.ebi.ac.uk/pdbsum/4cs2 PDBsum]</span></td></tr> | ||
<table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
The site-selective introduction of photo-crosslinking groups into proteins enables the discovery and mapping of weak and/or transient protein interactions with high spatiotemporal resolution, both in vitro and in vivo. We report the genetic encoding of a furan-based, photo-crosslinking amino acid in human cells; it can be activated with red light, thus offering high penetration depths in biological samples. This is achieved by activation of the amino acid and charging to its cognate tRNA by a pyrrolysyl-tRNA-synthetase (PylRS) mutant with broad polyspecificity. To gain insights into the recognition of this amino acid and to provide a rationale for its polyspecificity, we solved three crystal structures of the PylRS mutant: in its apo-form, in complex with adenosine 5'-(beta,gamma-imido)triphosphate (AMP-PNP) and in complex with the AMP ester of the furan amino acid. These structures provide clues for the observed polyspecificity and represent a promising starting point for the engineering of PylRS mutants with further increased substrate scope. | The site-selective introduction of photo-crosslinking groups into proteins enables the discovery and mapping of weak and/or transient protein interactions with high spatiotemporal resolution, both in vitro and in vivo. We report the genetic encoding of a furan-based, photo-crosslinking amino acid in human cells; it can be activated with red light, thus offering high penetration depths in biological samples. This is achieved by activation of the amino acid and charging to its cognate tRNA by a pyrrolysyl-tRNA-synthetase (PylRS) mutant with broad polyspecificity. To gain insights into the recognition of this amino acid and to provide a rationale for its polyspecificity, we solved three crystal structures of the PylRS mutant: in its apo-form, in complex with adenosine 5'-(beta,gamma-imido)triphosphate (AMP-PNP) and in complex with the AMP ester of the furan amino acid. These structures provide clues for the observed polyspecificity and represent a promising starting point for the engineering of PylRS mutants with further increased substrate scope. | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 09:24, 1 May 2014
Catalytic domain of Pyrrolysyl-tRNA synthetase mutant Y306A, Y384F in its apo form
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