Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27117863
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\27117863
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Wiley+Interdiscip+Rev+RNA
2016 ; 7
(5
): 620-36
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Structural insights into ribosome translocation
#MMPMID27117863
Ling C
; Ermolenko DN
Wiley Interdiscip Rev RNA
2016[Sep]; 7
(5
): 620-36
PMID27117863
show ga
During protein synthesis, tRNA and mRNA are translocated from the A to P to E
sites of the ribosome thus enabling the ribosome to translate one codon of mRNA
after the other. Ribosome translocation along mRNA is induced by the universally
conserved ribosome GTPase, elongation factor G (EF-G) in bacteria and elongation
factor 2 (EF-2) in eukaryotes. Recent structural and single-molecule studies
revealed that tRNA and mRNA translocation within the ribosome is accompanied by
cyclic forward and reverse rotations between the large and small ribosomal
subunits parallel to the plane of the intersubunit interface. In addition, during
ribosome translocation, the 'head' domain of small ribosomal subunit undergoes
forward- and back-swiveling motions relative to the rest of the small ribosomal
subunit around the axis that is orthogonal to the axis of intersubunit rotation.
tRNA/mRNA translocation is also coupled to the docking of domain IV of EF-G into
the A site of the small ribosomal subunit that converts the thermally driven
motions of the ribosome and tRNA into the forward translocation of tRNA/mRNA
inside the ribosome. Despite recent and enormous progress made in the
understanding of the molecular mechanism of ribosome translocation, the sequence
of structural rearrangements of the ribosome, EF-G and tRNA during translocation
is still not fully established and awaits further investigation. WIREs RNA 2016,
7:620-636. doi: 10.1002/wrna.1354 For further resources related to this article,
please visit the WIREs website.