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2014 ; 21
(9
): 743-53
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The evolutionary journey of Argonaute proteins
#MMPMID25192263
Swarts DC
; Makarova K
; Wang Y
; Nakanishi K
; Ketting RF
; Koonin EV
; Patel DJ
; van der Oost J
Nat Struct Mol Biol
2014[Sep]; 21
(9
): 743-53
PMID25192263
show ga
Argonaute proteins are conserved throughout all domains of life. Recently
characterized prokaryotic Argonaute proteins (pAgos) participate in host defense
by DNA interference, whereas eukaryotic Argonaute proteins (eAgos) control a wide
range of processes by RNA interference. Here we review molecular mechanisms of
guide and target binding by Argonaute proteins, and describe how the
conformational changes induced by target binding lead to target cleavage. On the
basis of structural comparisons and phylogenetic analyses of pAgos and eAgos, we
reconstruct the evolutionary journey of the Argonaute proteins through the three
domains of life and discuss how different structural features of pAgos and eAgos
relate to their distinct physiological roles.