Danio rerio      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 18 genes.  Reviewed (1 or Unreviewed (17

No.StatusiEKPD IDEnsemble Gene IDUniProt AccessionGene Name
1
iEKPD-Dar-0274
ENSDARG00000040111.7
Q49GP3
pi4kb
2
iEKPD-Dar-0010
ENSDARG00000002385.9
F1QJB6
atm
3
iEKPD-Dar-0584
ENSDARG00000079625.5
F1QMM7
atr
4
iEKPD-Dar-0324
ENSDARG00000053196.7
B0UX67
mtor
5
iEKPD-Dar-g006
ENSDARG00000076724.4
F1RCP0
pi4kaa
6
iEKPD-Dar-0421
ENSDARG00000060841.6
Q1L913
pik3c2a
7
iEKPD-Dar-g002
ENSDARG00000086927.3
F1QWN6
pik3c2b
8
iEKPD-Dar-0847
ENSDARG00000099803.2
A0A0G2L6J0
pik3c2g
9
iEKPD-Dar-0335
ENSDARG00000054829.9
A0A0R4IWW5
pik3c3
10
iEKPD-Dar-g010
ENSDARG00000075456.4
F1QAD7
pik3ca
11
iEKPD-Dar-0529
ENSDARG00000075253.4
E7F251
pik3cb
12
iEKPD-Dar-0016
ENSDARG00000003250.9
F1RB17
pik3cd
13
iEKPD-Dar-0131
ENSDARG00000017757.8
F1QVE6
pik3cg
14
iEKPD-Dar-0525
ENSDARG00000075083.5
E7F4J7
prkdc
15
iEKPD-Dar-0258
ENSDARG00000037527.5
F1RCE2
si:rp71-17i16.5
16
iEKPD-Dar-0333
ENSDARG00000054570.7
F6NHQ0
smg1
17
iEKPD-Dar-0867
ENSDARG00000100623.1
A0A0R4ITC5
trrap
18
iEKPD-Dar-0417
ENSDARG00000060597.7
F8W2C2
zgc:158659