Selaginella moellendorffii      Atypical      PIKK

※ PIKK family introduction

    Phosphatidylinositol-3 kinase-related kinases (PIKKs) belong to atypical protein kinase group, which share little similarity of kinase catalytic domain. PIKKs family contains six members which are involved in responding to various stresses, including DNA damage, blocks in DNA replication, availability of nutrients and errors in mRNA splicing. The protein kinase domain of PIKKS, located in C-terminus, is always flanked by two conserved domain, known as FAT and FATC domain, which may interact and participate in kinase regulation (1).
ATM, one of family member, is involved in responding to a specific type of DNA damage, such as DNA double strand breaks, and controls the cell-cycle progression by phosphorylates multiple substrates including p53 and Chk2. In addition, ATM also locates in cytoplasmic especially in neuronal or neuron-like cells (2).
Ataxia telangiectasia and Rad3-related protein (ATR) acts as a DNA damage sensor. Activated by DNA lesions including base adducts, crosslinks, DSBs, and compounds that directly promote replication stress such as hydroxyurea and aphidicolin and phosphorylates multiple substrates to control the DNA replication and mitosis (3).
mTOR is a serine/threonine protein kinase which is a central regulator of cellular metabolism, growth and survival in response to hormones, growth factors, nutrients, energy and stress signals. mTOR is regulated by dynamic changes in cellular localization.(3)
Transformation/transcription domain-associated protein (TRRAP) is also structurally related to the PIKK family. TRRAP proteins (Tra1 in budding yeast) are common components of many histone acetyltransferase (HAT) complexes, and mediate a variety of cellular processes by recruiting HAT complexes to chromatin (4).

Reference
1. Lempiainen, H. and Halazonetis, T.D. (2009) Emerging common themes in regulation of PIKKs and PI3Ks. EMBO J, 28, 3067-3073. PMID: 19779456
2. Yang, D.Q., Halaby, M.J., Li, Y., Hibma, J.C. and Burn, P. (2011) Cytoplasmic ATM protein kinase: an emerging therapeutic target for diabetes, cancer and neuronal degeneration. Drug Discov Today, 16, 332-338. PMID: 21315178
3. Lovejoy, C.A. and Cortez, D. (2009) Common mechanisms of PIKK regulation. DNA Repair (Amst), 8, 1004-1008. PMID: 19464237
4. Kanoh, J. and Yanagida, M. (2007) Tel2: a common partner of PIK-related kinases and a link between DNA checkpoint and nutritional response? Genes Cells, 12, 1301-1304. PMID: 18076567


There are 12 genes.  Reviewed (0 or Unreviewed (12

No.StatusEKPD IDGene IDGene Name
1
EKS-SEM-00952
SELMODRAFT_128358
SELMODRAFT_128358
2
EKS-SEM-00950
SELMODRAFT_449361
SELMODRAFT_449361; TOR-2
3
EKS-SEM-00955
SELMODRAFT_130952
SELMODRAFT_130952
4
EKS-SEM-00954
SELMODRAFT_125024
SELMODRAFT_125024
5
EKS-SEM-00959
SELMODRAFT_129513
SELMODRAFT_129513
6
EKS-SEM-00958
SELMODRAFT_84321
SELMODRAFT_84321
7
EKS-SEM-00956
SELMODRAFT_88215
SELMODRAFT_88215
8
EKS-SEM-00960
SELMODRAFT_156606
SELMODRAFT_156606
9
EKS-SEM-00961
SELMODRAFT_98463
SELMODRAFT_98463
10
EKS-SEM-00957
SELMODRAFT_114908
SELMODRAFT_114908
11
EKS-SEM-00953
SELMODRAFT_110199
SELMODRAFT_110199
12
EKS-SEM-00951
SELMODRAFT_413509
TOR-1; SELMODRAFT_413509