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2HHL

Crystal structure of the human small CTD phosphatase 3 isoform 1

Functional Information from GO Data
ChainGOidnamespacecontents
A0008420molecular_functionRNA polymerase II CTD heptapeptide repeat phosphatase activity
A0016791molecular_functionphosphatase activity
B0008420molecular_functionRNA polymerase II CTD heptapeptide repeat phosphatase activity
B0016791molecular_functionphosphatase activity
C0008420molecular_functionRNA polymerase II CTD heptapeptide repeat phosphatase activity
C0016791molecular_functionphosphatase activity
D0008420molecular_functionRNA polymerase II CTD heptapeptide repeat phosphatase activity
D0016791molecular_functionphosphatase activity
Functional Information from PDB Data
site_idAC1
Number of Residues9
DetailsBINDING SITE FOR RESIDUE KEG A 902
ChainResidue
ATYR26
AGLY27
ALYS28
AHIS41
ASER43
APHE44
ALYS45
BVAL6
BPRO12

site_idAC2
Number of Residues7
DetailsBINDING SITE FOR RESIDUE KEG C 900
ChainResidue
APRO55
AILE62
AGLN64
AHOH987
CSER43
CPHE44
CLYS45

site_idAC3
Number of Residues6
DetailsBINDING SITE FOR RESIDUE KEG D 901
ChainResidue
BPRO55
BILE62
BGLN64
DSER43
DPHE44
DLYS45

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues632
DetailsDomain: {"description":"FCP1 homology","evidences":[{"source":"PROSITE-ProRule","id":"PRU00336","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues4
DetailsActive site: {"description":"4-aspartylphosphate intermediate","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues4
DetailsActive site: {"description":"Proton donor","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues12
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues8
DetailsSite: {"description":"Transition state stabilizer","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

249697

PDB entries from 2026-02-25

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