XXXX -binding mechanisms in pseudokinases.

@entity1 @entity5 @entity4334 @entity11064 @entity855
UNASSIGNED: Pseudokinases are classified by the lack of one or several of the highly conserved motifs involved in @entity4334 (nt) binding or catalytic activity of protein kinases (PKs). Pseudokinases represent    10% of the @entity1 kinome and they are found in all evolutionary classes of kinases. It has become evident that pseudokinases, which were initially considered somewhat peculiar dead kinases, are important components in several signalling cascades. Furthermore, several pseudokinases have been linked to @entity1 diseases, particularly @entity5 , which is raising interest for therapeutic approaches towards these proteins. The @entity855 -binding pocket is a well-established drug target and elucidation of the mechanism and properties of nt binding in pseudokinases is of significant interest and importance. Recent studies have demonstrated that members of the pseudokinase family are very diverse in structure as well as in their ability and mechanism to bind nts or perform @entity11064 transfer reactions. This diversity also precludes prediction of pseudokinase function, or the importance of nt binding for said function, based on primary sequence alone. Currently available data indicate that    40% of pseudokinases are able to bind nts, whereas only few are able to catalyse occasional @entity11064 transfer. Pseudokinases employ diverse mechanisms to bind nts, which usually occurs at low, but physiological, affinity. @entity855 binding serves often a structural role but in most cases the functional roles are not precisely known. In the present review, we discuss the various mechanisms that pseudokinases employ for nt binding and how this often low-affinity binding can be accurately analysed.
