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5M4I

Complex structure of human protein kinase CK2 catalytic subunit with the inhibitor 4'-carboxy-6,8-chloro-flavonol (FLC21) crystallized under high-salt conditions

Functional Information from GO Data
ChainGOidnamespacecontents
A0004672molecular_functionprotein kinase activity
A0004674molecular_functionprotein serine/threonine kinase activity
A0005524molecular_functionATP binding
A0006468biological_processprotein phosphorylation
Functional Information from PDB Data
site_idAC1
Number of Residues12
Detailsbinding site for residue 7FC A 401
ChainResidue
ATYR50
AASP175
AHOH511
AHOH512
AVAL66
ALYS68
AILE95
APHE113
AGLU114
AHIS115
AVAL116
AMET163

site_idAC2
Number of Residues3
Detailsbinding site for residue CL A 402
ChainResidue
ALYS158
APRO159
AHIS160

site_idAC3
Number of Residues3
Detailsbinding site for residue CL A 403
ChainResidue
AARG155
ATYR188
AASN189

site_idAC4
Number of Residues2
Detailsbinding site for residue CL A 404
ChainResidue
AHIS148
AALA315

site_idAC5
Number of Residues4
Detailsbinding site for residue CL A 405
ChainResidue
ALYS229
APHE232
AHIS234
AARG244

site_idAC6
Number of Residues4
Detailsbinding site for residue CL A 406
ChainResidue
ASER51
ALYS68
AHIS160
AHOH592

Functional Information from PROSITE/UniProt
site_idPS00107
Number of Residues24
DetailsPROTEIN_KINASE_ATP Protein kinases ATP-binding region signature. LGRGKYSEVFeAinitnnek..........VVVK
ChainResidueDetails
ALEU45-LYS68

site_idPS00108
Number of Residues13
DetailsPROTEIN_KINASE_ST Serine/Threonine protein kinases active-site signature. ImHrDVKphNVMI
ChainResidueDetails
AILE152-ILE164

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues285
DetailsDomain: {"description":"Protein kinase","evidences":[{"source":"PROSITE-ProRule","id":"PRU00159","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues5
DetailsRegion: {"description":"Interaction with beta subunit","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsActive site: {"description":"Proton acceptor"}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues9
DetailsBinding site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU00159","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

249697

PDB entries from 2026-02-25

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