10.1002/bip.22832 http://scihub22266oqcxt.onion/10.1002/bip.22832 C5084732!5084732
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Biopolymers
2016 ; 105
(8
): 463-75
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Review: Translational GTPases
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Maracci C
; Rodnina MV
Biopolymers
2016[Aug]; 105
(8
): 463-75
PMID26971860
show ga
Translational GTPases (trGTPases) play key roles in facilitating protein
synthesis on the ribosome. Despite the high degree of evolutionary conservation
in the sequences of their GTP-binding domains, the rates of GTP hydrolysis and
nucleotide exchange vary broadly between different trGTPases. EF-Tu, one of the
best-characterized model G proteins, evolved an exceptionally rapid and tightly
regulated GTPase activity, which ensures rapid and accurate incorporation of
amino acids into the nascent chain. Other trGTPases instead use the energy of GTP
hydrolysis to promote movement or to ensure the forward commitment of translation
reactions. Recent data suggest the GTPase mechanism of EF-Tu and provide an
insight in the catalysis of GTP hydrolysis by its unusual activator, the
ribosome. Here we summarize these advances in understanding the functional cycle
and the regulation of trGTPases, stimulated by the elucidation of their
structures on the ribosome and the progress in dissecting the reaction mechanism
of GTPases. © 2016 Wiley Periodicals, Inc. Biopolymers 105: 463-475, 2016.
Please enable JavaScript to view the comments powered by Disqus. |*Guanosine Triphosphate/chemistry/metabolism
[MESH] |*Peptide Elongation Factor Tu/chemistry/metabolism
[MESH] |*Ribosomes/chemistry/metabolism
[MESH] |Animals
[MESH] |Catalysis
[MESH] |Humans
[MESH] |Hydrolysis
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