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Third Protein kinase C-related kinase homology region 1 (HR1) Rho-binding domain of Protein Kinase N1 PKN1, also called PKNalpha or Protein-kinase C-related kinase 1 (PRK1), is a serine/threonine protein kinase that is activated by the Rho family of small GTPases, and by fatty acids such as arachidonic and linoleic acids. It is expressed ubiquitously and is the most abundant PKN isoform in neurons. PKN1 is implicated in a variety of functions including cytoskeletal reorganization, cardiac cell survival, cell adhesion, and glucose transport, among others. PKN1 contains three HR1 domains, a C2 domain, and a kinase domain. This model characterizes the third HR1 domain of PKN1. HR1 domains are anti-parallel coiled-coil (ACC) domains that bind small GTPases from the Rho family; PKN1 binds the GTPases RhoA, RhoB, and RhoC, and can also interact weakly with Rac. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",