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EC Number Crystallization (Commentary)
Show all pathways known for 2.7.1.164Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.164-
Show all pathways known for 2.7.1.164Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.164in complex with an anticodon-stem/loop truncated tRNASec, to 2.4 A resolution. Truncated tRNASec is bound between the enzyme's C-terminal domain CTD and N-terminal kinase domain NTD that are connected by a flexible 11 amino acid linker. Upon tRNASec recognition, the CTD undergoes a 62-A movement to allow proper binding of the 7-bp D-stem. This large reorganization of the quaternary structure likely provides a means by which the unique tRNASec species can be accurately recognized with high affinity by the translation machinery
Show all pathways known for 2.7.1.164Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.164in complex with Methanopyrus tRNASec and with 5'-adenylyl imidodiphosphate, to 2.5-2.9 A resolution. The enzyme consists of two independent linker-connected domains, the N-terminal catalytic domain NTD and the C-terminal domain CTD. The D-arm-CTD binding occurs independently of and much more strongly than the acceptor-arm-NTD binding. The enzyme thereby distinguishes the characteristic D arm with the maximal stem and the minimal loop of tRNASec from the canonical D arm of tRNASer, without interacting with the anticodon
Show all pathways known for 2.7.1.164Display the word mapDisplay the reaction diagram Show all sequences 2.7.1.164sitting drop vapor diffusion method at 20°C, the structures of MjPSTK complexed with ADP and AMPPNP revealed that this enzyme belongs to the P-loop kinase class, and that the kinase domain is closely related to gluconate kinase and adenylate kinase. ATP is bound by the P-loop domain (residues 11-18). Formed by antiparallel dimerization of two O-phosphoseryl-tRNASec kinase monomers, the enzyme structure shows a deep groove with positive electrostatic potential. Located in this groove is the active site of the enzyme, which biochemical and genetic data suggest is composed of Asp-41, Arg-44, Glu-55, Tyr-82, Tyr-83, Met-86, and Met-132
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