Xenopus tropicalis      Asp-Based PSP/FCP


※ FCP family introduction

    FCP/SCP phosphatase belongs to a family of phosphatase which uses an Asp nucleophile for catalysis. FCP/SCP is characterized by its phosphatase activity towards the CTD of the largest subunit of RNA polymerase II (1). At least seven members have been identified in human genome and FCP/SCP phosphatases share a conserved catalytic signature, which is known as DXDXT/V (2). Family member FCP1 is conserved among all eukaryotes and plays an important role in cell survival in budding and fission yeasts. SCP1 preferentially dephosphorylates Ser5 in CTD domain of RNA polymerase II and plays a role in the regulation of gene expression by controlling the transition from initiation/capping to processive transcript elongation (3). In addition, SCP1 also acts as a key regulator that functions in silencing neuronal gene expression (4).

Reference
1. Shi, Y. (2009) Serine/threonine phosphatases: mechanism through structure. Cell, 139, 468-484. PMID: 19879837
2. Moorhead, G.B., Trinkle-Mulcahy, L. and Ulke-Lemee, A. (2007) Emerging roles of nuclear protein phosphatases. Nat Rev Mol Cell Biol, 8, 234-244. PMID: 17318227
3. Yeo, M., Lin, P.S., Dahmus, M.E. and Gill, G.N. (2003) A novel RNA polymerase II C-terminal domain phosphatase that preferentially dephosphorylates serine 5. J Biol Chem, 278, 26078-26085. PMID: 12721286
4. Yeo, M., Lee, S.K., Lee, B., Ruiz, E.C., Pfaff, S.L. and Gill, G.N. (2005) Small CTD phosphatases function in silencing neuronal gene expression. Science, 307, 596-600. PMID: 15681389


There are 8 genes.  Reviewed (3 or Unreviewed (5

No.StatusiEKPD IDEnsemble Gene IDUniProt AccessionGene Name
1
iEKPD-Xet-0668
ENSXETG00000006637.2
Q28HW9
ctdnep1
2
iEKPD-Xet-0681
ENSXETG00000007843.2
Q66KM5
ctdspl2
3
iEKPD-Xet-0676
ENSXETG00000016360.2
Q28EX9
ublcp1
4
iEKPD-Xet-1404
ENSXETG00000000856.3
F7B1B3
ctdp1
5
iEKPD-Xet-0665
ENSXETG00000014963.3
F7DHV8
ctdsp1
6
iEKPD-Xet-0663
ENSXETG00000009646.3
Q6DFS5
ctdsp2
7
iEKPD-Xet-0673
ENSXETG00000018471.3
A0A1B8Y9Z5
ctdspl
8
iEKPD-Xet-0674
ENSXETG00000002882.3
F7EKT2
timm50