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2014 ; 136
(51
): 17692-701
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Principles of allosteric interactions in cell signaling
#MMPMID25474128
Nussinov R
; Tsai CJ
; Liu J
J Am Chem Soc
2014[Dec]; 136
(51
): 17692-701
PMID25474128
show ga
Linking cell signaling events to the fundamental physicochemical basis of the
conformational behavior of single molecules and ultimately to cellular function
is a key challenge facing the life sciences. Here we outline the emerging
principles of allosteric interactions in cell signaling, with emphasis on the
following points. (1) Allosteric efficacy is not a function of the chemical
composition of the allosteric pocket but reflects the extent of the population
shift between the inactive and active states. That is, the allosteric effect is
determined by the extent of preferred binding, not by the overall binding
affinity. (2) Coupling between the allosteric and active sites does not decide
the allosteric effect; however, it does define the propagation pathways, the
allosteric binding sites, and key on-path residues. (3) Atoms of allosteric
effectors can act as "driver" or "anchor" and create attractive "pulling" or
repulsive "pushing" interactions. Deciphering, quantifying, and integrating the
multiple co-occurring events present daunting challenges to our scientific
community.