Drosophila melanogaster      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 9 genes.  Reviewed (4 or Unreviewed (5

No.StatusiEKPD IDEnsemble Gene IDUniProt AccessionGene Name
1
iEKPD-Drm-0235
FBgn0029067
Q9VRG7
Dd
2
iEKPD-Drm-0243
FBgn0035124
Q9W0S3
ttm2
3
iEKPD-Drm-0242
FBgn0032971
Q9V9P3
ttm3
4
iEKPD-Drm-0248
FBgn0250874
Q9W4V8
ttm50
5
iEKPD-Drm-0239
FBgn0033322
Q7JY68
CG8584
6
iEKPD-Drm-0236
FBgn0035426
Q9VZS0
DmelCG12078
7
iEKPD-Drm-0244
FBgn0036556
M9PFN0
DmelCG5830
8
iEKPD-Drm-0627
FBgn0035026
Q9W147
Fcp1
9
iEKPD-Drm-0250
FBgn0027526
Q9XZ16
Ublcp1