View source for 2ghq

[[Image:2ghq.gif|left|200px]]

 {{Structure
|PDB= 2ghq |SIZE=350|CAPTION= <scene name='initialview01'>2ghq</scene>, resolution 2.05&Aring;
|SITE= 
|LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene>
|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Phosphoprotein_phosphatase Phosphoprotein phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.16 3.1.3.16] </span>
|GENE= CTDSP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])
|DOMAIN=
|RELATEDENTRY=[[1ta0|1TA0]]
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ghq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ghq OCA], [http://www.ebi.ac.uk/pdbsum/2ghq PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2ghq RCSB]</span>
}}

'''CTD-specific phosphatase Scp1 in complex with peptide C-terminal domain of RNA polymerase II'''


==Overview==
Phosphorylation and dephosphorylation of the C-terminal domain (CTD) of RNA polymerase II (Pol II) represent a critical regulatory checkpoint for transcription. Transcription initiation requires Fcp1/Scp1-mediated dephosphorylation of phospho-CTD. Fcp1 and Scp1 belong to a family of Mg2+ -dependent phosphoserine (P.Ser)/phosphothreonine (P.Thr)-specific phosphatases. We recently showed that Scp1 is an evolutionarily conserved regulator of neuronal gene silencing. Here, we present the X-ray crystal structures of a dominant-negative form of human Scp1 (D96N mutant) bound to mono- and diphosphorylated peptides encompassing the CTD heptad repeat (Y1S2P3T4S5P6S7). Moreover, kinetic and thermodynamic analyses of Scp1-phospho-CTD peptide complexes support the structures determined. This combined structure-function analysis discloses the residues in Scp1 involved in CTD binding and its preferential dephosphorylation of P.Ser5 of the CTD heptad repeat. Moreover, these results provide a template for the design of specific inhibitors of Scp1 for the study of neuronal stem cell development.

==About this Structure==
2GHQ is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GHQ OCA]. 

==Reference==
Determinants for dephosphorylation of the RNA polymerase II C-terminal domain by Scp1., Zhang Y, Kim Y, Genoud N, Gao J, Kelly JW, Pfaff SL, Gill GN, Dixon JE, Noel JP, Mol Cell. 2006 Dec 8;24(5):759-70. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17157258 17157258]
[[Category: Homo sapiens]]
[[Category: Phosphoprotein phosphatase]]
[[Category: Protein complex]]
[[Category: Noel, J P.]]
[[Category: Zhang, Y.]]
[[Category: had superfamily]]
[[Category: protein-peptide complex]]

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