1pys
From Proteopedia
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PHENYLALANYL-TRNA SYNTHETASE FROM THERMUS THERMOPHILUS
Overview
The crystal structure of phenylalanyl-tRNA synthetase from Thermus thermophilus, solved at 2.9 A resolution, displays (alpha beta)2 subunit organization. Unexpectedly, both the catalytic alpha- and the non-catalytic beta-subunits comprise the characteristic fold of the class II active-site domains. The alpha beta heterodimer contains most of the building blocks so far identified in the class II synthetases. The presence of an RNA-binding domain, similar to that of the U1A spliceosomal protein, in the beta-subunit is indicative of structural relationships among different families of RNA-binding proteins. The structure suggests a plausible catalytic mechanism which explains why the primary site of tRNA aminoacylation is different from that of the other class II enzymes.
About this Structure
1PYS is a Protein complex structure of sequences from Thermus thermophilus with as ligand. Active as Phenylalanine--tRNA ligase, with EC number 6.1.1.20 Full crystallographic information is available from OCA.
Reference
Structure of phenylalanyl-tRNA synthetase from Thermus thermophilus., Mosyak L, Reshetnikova L, Goldgur Y, Delarue M, Safro MG, Nat Struct Biol. 1995 Jul;2(7):537-47. PMID:7664121
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