Phosphatase Subfamily CTDSPL2
CTDSPL2 (CTD small phosphatase like 2) is a poorly-studied RNA polymerase CTD phosphatase which is found in most eukaryotes.
CTDSPL2 is found as a single copy gene in most eukaryotes. It is absent from all but a few basal fungi, and is also lost in Drosophilids. The human gene is called HSPC058, HSPC129, or SCP4
Usually a C-terminal phosphatase domain with a relatively poorly conserved N-terminal extension
Human CTDSPL2 has experimentally-shown activity  and orthologs are also predicted to be active.
Human CTDSPL2 binds and dephosphorylates Smad1/5/8, and attenuates signaling through the BMP pathway 
- Qian H, Ji C, Zhao S, Chen J, Jiang M, Zhang Y, Yan M, Zheng D, Sun Y, Xie Y, and Mao Y. Expression and characterization of HSPC129, a RNA polymerase II C-terminal domain phosphatase. Mol Cell Biochem. 2007 Sep;303(1-2):183-8. DOI:10.1007/s11010-007-9472-z |
- Zhao Y, Xiao M, Sun B, Zhang Z, Shen T, Duan X, Yu PB, Feng XH, and Lin X. C-terminal domain (CTD) small phosphatase-like 2 modulates the canonical bone morphogenetic protein (BMP) signaling and mesenchymal differentiation via Smad dephosphorylation. J Biol Chem. 2014 Sep 19;289(38):26441-50. DOI:10.1074/jbc.M114.568964 |
Human CTDSPL2 from NCBI Gene