Difference between revisions of "Phosphatase Family FCP"

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[[Phosphatase classification|Phosphatase Classification]]:  [[Phosphatase_Superfamily_HAD|Superfamily HAD]]: [[Phosphatase_Family_FCP|Family FCP]]
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[[Phosphatase classification|Phosphatase Classification]]:  [[Phosphatase_Fold_HAD|Fold HAD]]: [[Phosphatase_Superfamily_HAD|Superfamily HAD]]: [[Phosphatase_Family_FCP|Family FCP]]
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FCP contains five catalytically active families, and one inactive one (TIMM50). Four of the five catalytically active families show phosphatase activity toward the C-terminal domain (CTD) of RNA polymerase II (Pol II). The CTD consists of tandem repeated heptapeptide segments usually of a consensus sequence YSPTSPS, and the different phosphorylation patterns that predominate at each stage of transcription recruit the appropriate set of mRNA-processing and histone-modifying factors. FCP1 and SCP have different preference over pSer2 and pSer5, which may be important for regulating phosphorylation patterns. See [[CTD_Phosphorylation|Phosphorylation of RNA polymerase II C-terminal domain]].
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FCP contains five catalytically active subfamilies, and one inactive one (TIMM50). Four of the five catalytically active subfamilies act on the C-terminal domain (CTD) of RNA polymerase II (Pol II). The CTD consists of tandem repeated heptapeptide segments of a consensus YSPTSPS sequence, and the different phosphorylation patterns that predominate at each stage of transcription recruit the appropriate set of mRNA-processing and histone-modifying factors. FCP1 and SCP have different preference over pSer2 and pSer5. See [[CTD_Phosphorylation|Phosphorylation of RNA polymerase II C-terminal domain]].
  
 
===[[Phosphatase_Subfamily_FCP1|FCP1]]===
 
===[[Phosphatase_Subfamily_FCP1|FCP1]]===

Latest revision as of 04:43, 9 May 2016

Phosphatase Classification: Fold HAD: Superfamily HAD: Family FCP


FCP contains five catalytically active subfamilies, and one inactive one (TIMM50). Four of the five catalytically active subfamilies act on the C-terminal domain (CTD) of RNA polymerase II (Pol II). The CTD consists of tandem repeated heptapeptide segments of a consensus YSPTSPS sequence, and the different phosphorylation patterns that predominate at each stage of transcription recruit the appropriate set of mRNA-processing and histone-modifying factors. FCP1 and SCP have different preference over pSer2 and pSer5. See Phosphorylation of RNA polymerase II C-terminal domain.

FCP1

F-cell production 1 (FCP1) also called TFIIF-stimulated CTD phosphatase 1, prefers to dephosphorylate pSer2 of the CTD

SCP

SCP is named after Small CTD (carboxy-terminal domain, RNA polymerase II, polypeptide A) phosphatase. This subfamily has three members in human, SCP1 (or CTDSP1), SCP2 (or CTDSP2), and SCP3 (or CTDSPL). SCP1 prefers to dephosphorylate pSer5.

Dullard

Dullard, is also known as CTDNEP1 (CTD nuclear envelope phosphatase 1). However, its known substrate is lipin rather than RNA polymerase II CTD. The kinase of yeast lipin, SMP2, is Cdc28/cdk1.

CTDSPL2

A poorly-described but almost pan-eukaryotic CTD phosphatase.

UBLCP1

UBLCP1 is named after Ubiquitin-like domain containing CTD phosphatase 1. It has not been well characterized. It has a N-terminal domain similar to ubiquitin. Its putative substrate is the CTD.

TIMM50

TIMM50, translocase of inner mitochondrial membrane 50 homolog. Catalytically inactive.

DxDxT motif

The pattern of DxDxT motif are obtained from eight organisms, yeast, Monosiga, sponge, anemone, worm, fly, sea urchin, and human.

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Subfamily Motif pattern Note
FCP1 DLDQT
SCP DLDET
Dullard DLDET Exceptionally, one of the three fly Dullards has DMDNT.
HSPC129 DLDET
UBLCP1 D[I|V]DYT
TIMM50 - Not very conserved.
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