Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\26495045
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Biophys+Rev
2015 ; 7
(2
): 239-249
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Investigating Dynamic Interdomain Allostery in Pin1
#MMPMID26495045
Peng JW
Biophys Rev
2015[Jun]; 7
(2
): 239-249
PMID26495045
show ga
Signaling proteins often sequester complementary functional sites in separate
domains. How do the different domains communicate with one another? An attractive
system to address this question is the mitotic regulator, human Pin1 (Lu et al.
1996). Pin-1 consists of two tethered domains: a WW domain for substrate binding,
and a catalytic domain for peptidyl-prolyl isomerase (PPIase) activity. Pin1
accelerates the cis-trans isomerization of phospho-Ser/Thr-Pro (pS/T-P) motifs
within proteins regulating the cell cycle and neuronal development. The early
x-ray (Ranganathan et al. 1997; Verdecia et al. 2000) and solution NMR studies
(Bayer et al. 2003; Jacobs et al. 2003) of Pin1 indicated inter- and intradomain
motion. We became interested in exploring how such motions might affect
interdomain communication, using NMR. Our accumulated results indicate substrate
binding to Pin1 WW domain changes the intra/inter domain mobility, thereby
altering substrate activity in the distal PPIase domain catalytic site. Thus,
Pin1 shows evidence of dynamic allostery, in the sense of Cooper and Dryden
(Cooper and Dryden 1984). We highlight our results supporting this conclusion,
and summarize them via a simple speculative model of conformational selection.