Protein Domain : Dual specificity mitogen-activated protein kinase kinase 5, PB1 domain IPR034851

Type  Domain
Description  Mitogen-activated protein kinase kinase 5 (MAP2K5, alias MEK5) is a member of the ERK5 pathway, involved in angiogenesis and development [ , ]. ERK5 is a MAPK activated in response to various stimuli through a three-tier cascade constituting MEK5 and MEKK2/3. MEK5 phosphorylates the activation loop of ERK5 at Thr218 and Tyr220 leading to its activation []. The PB1 domain of MEK5 interacts with the PB1 domains of other members of the kinase cascade, MEKK2 and MEKK3 [].The PB1s are dimerization/oligomerization domains present in adaptor and scaffold proteins as well as kinases and serve to organize platforms that ensure specificity and fidelity during cellular signalling [ ]. The interaction between two PB1 domain depends on the type of PB1. There are three types of PB1 domains: type I which contains an OPCA motif, acidic aminoacid cluster, type II which contains a basic cluster, and type I/II which contains both an OPCA motif and a basic cluster. The Map2k5 protein contains a type I PB1 domain [].
Short Name  PB1_MAP2K5

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