2cjb: Difference between revisions
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==Crystal structure of Methanosarcina barkeri seryl-tRNA synthetase complexed with serine== | ==Crystal structure of Methanosarcina barkeri seryl-tRNA synthetase complexed with serine== | ||
<StructureSection load='2cjb' size='340' side='right' caption='[[2cjb]], [[Resolution|resolution]] 2.70Å' scene=''> | <StructureSection load='2cjb' size='340' side='right'caption='[[2cjb]], [[Resolution|resolution]] 2.70Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2cjb]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Metbf Metbf]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CJB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2CJB FirstGlance]. <br> | <table><tr><td colspan='2'>[[2cjb]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Metbf Metbf]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CJB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2CJB FirstGlance]. <br> | ||
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==See Also== | ==See Also== | ||
*[[Aminoacyl tRNA | *[[Aminoacyl tRNA synthetase 3D structures|Aminoacyl tRNA synthetase 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Metbf]] | [[Category: Metbf]] | ||
[[Category: Serine--tRNA ligase]] | [[Category: Serine--tRNA ligase]] | ||
Revision as of 15:00, 10 May 2019
Crystal structure of Methanosarcina barkeri seryl-tRNA synthetase complexed with serineCrystal structure of Methanosarcina barkeri seryl-tRNA synthetase complexed with serine
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedMethanogenic archaea possess unusual seryl-tRNA synthetase (SerRS), evolutionarily distinct from the SerRSs found in other archaea, eucaryotes and bacteria. The two types of SerRSs show only minimal sequence similarity, primarily within class II conserved motifs 1, 2 and 3. Here, we report a 2.5 A resolution crystal structure of the atypical methanogenic Methanosarcina barkeri SerRS and its complexes with ATP, serine and the nonhydrolysable seryl-adenylate analogue 5'-O-(N-serylsulfamoyl)adenosine. The structures reveal two idiosyncratic features of methanogenic SerRSs: a novel N-terminal tRNA-binding domain and an active site zinc ion. The tetra-coordinated Zn2+ ion is bound to three conserved protein ligands (Cys306, Glu355 and Cys461) and binds the amino group of the serine substrate. The absolute requirement of the metal ion for enzymatic activity was confirmed by mutational analysis of the direct zinc ion ligands. This zinc-dependent serine recognition mechanism differs fundamentally from the one employed by the bacterial-type SerRSs. Consequently, SerRS represents the only known aminoacyl-tRNA synthetase system that evolved two distinct mechanisms for the recognition of the same amino-acid substrate. Structure of the unusual seryl-tRNA synthetase reveals a distinct zinc-dependent mode of substrate recognition.,Bilokapic S, Maier T, Ahel D, Gruic-Sovulj I, Soll D, Weygand-Durasevic I, Ban N EMBO J. 2006 Jun 7;25(11):2498-509. Epub 2006 May 4. PMID:16675947[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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