※ STE20 family introduction

    STE20 was first identified as a putative MAP4K in mating pathway in yeast and its homologs in human constitute a large family in STE group. STE20 can further be classified into two subclasses, PAK and GCK. Structure analysis shows that the kinase domains in PAKs are located at C-terminal while GCKs kinase domains are located in N-terminal. Three mammalian STE20-like kinases have been reported to be able to phosphorylate MAP3Ks, including HPK1, GLK and PAK2. HPK1 predominantly mediate the activation of the stress-activated SAPK/JNK pathway. PAK2 is activated via binding of the Rac1 or Cdc42 and subsequently involved in direct phosphorylation of MAP3K Raf-1. Besides as a upstream activator of MAPK pathway, STE20 are often used in signaling events, including cell apoptosis, morphogenesis and cytoskeletal rearrangement such as cell motility and cell shape changes (1).

Reference
1. Dan, I., Watanabe, N.M. and Kusumi, A. (2001) The Ste20 group kinases as regulators of MAP kinase cascades. Trends Cell Biol, 11, 220-230. PMID: 11316611

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No.	Status	EKPD ID	Gene ID	Gene Name
1		EKS-ORB-01022	OB03G11110	OB03G11110
2		EKS-ORB-01018	OB03G41570	OB03G41570
3		EKS-ORB-01023	OB02G15260	OB02G15260
4		EKS-ORB-01024	OB03G36770	OB03G36770
5		EKS-ORB-01019	OB06G23370	OB06G23370
6		EKS-ORB-01020	OB02G42350	OB02G42350
7		EKS-ORB-01017	OB07G21500	OB07G21500
8		EKS-ORB-01021	OB10G23030	OB10G23030