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2CNH

Structural Insights into the Design of Nonpeptidic Isothiazolidinone- Containing Inhibitors of Protein Tyrosine Phosphatase 1B

Functional Information from GO Data
ChainGOidnamespacecontents
A0004725molecular_functionprotein tyrosine phosphatase activity
A0006470biological_processprotein dephosphorylation
A0016311biological_processdephosphorylation
Functional Information from PDB Data
site_idAC1
Number of Residues8
DetailsBINDING SITE FOR RESIDUE CA A1299
ChainResidue
AHIS54
AHOH2078
AHOH2079
AHOH2080
AHOH2081
AHOH2161
AHOH2164
AHOH2165

site_idAC2
Number of Residues20
DetailsBINDING SITE FOR RESIDUE IZB A1300
ChainResidue
AASP48
AVAL49
AASP181
APHE182
ACYS215
ASER216
AALA217
AGLY218
AILE219
AGLY220
AARG221
AGLN262
AGLN266
AGLU293
ALEU294
AHOH2272
AHOH2273
AHOH2274
AHOH2275
ATYR46

Functional Information from PROSITE/UniProt
site_idPS00383
Number of Residues11
DetailsTYR_PHOSPHATASE_1 Tyrosine specific protein phosphatases active site. VHCsaGigRSG
ChainResidueDetails
AVAL213-GLY223

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues274
DetailsDomain: {"description":"Tyrosine-protein phosphatase","evidences":[{"source":"PROSITE-ProRule","id":"PRU00160","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsActive site: {"description":"Phosphocysteine intermediate"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsBinding site: {}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues7
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues1
DetailsModified residue: {"description":"Phosphotyrosine","evidences":[{"source":"PubMed","id":"15592455","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues1
DetailsModified residue: {"description":"Phosphoserine; by PKB/AKT1, CLK1 and CLK2","evidences":[{"source":"PubMed","id":"10480872","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"11579209","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"23186163","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues1
DetailsModified residue: {"description":"Phosphotyrosine; by EGFR","evidences":[{"source":"PubMed","id":"9355745","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues1
DetailsModified residue: {"description":"S-nitrosocysteine; in reversibly inhibited form","evidences":[{"source":"PubMed","id":"22169477","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues2
DetailsModified residue: {"description":"Phosphoserine; by CLK1 and CLK2","evidences":[{"source":"PubMed","id":"10480872","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues2
DetailsCross-link: {"description":"N,N-(cysteine-1,S-diyl)serine (Cys-Ser); in inhibited form","evidences":[{"source":"PubMed","id":"12802338","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"12802339","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues4
DetailsAnnotated By Reference To The Literature 1bzc
ChainResidueDetails
AARG221
AASP181
ACYS215
ASER222

site_idMCSA1
Number of Residues5
DetailsM-CSA 469
ChainResidueDetails
AASP181proton shuttle (general acid/base)
ACYS215covalent catalysis
AARG221activator, electrostatic stabiliser
ASER222activator, electrostatic stabiliser
AGLN262steric role

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PDB entries from 2025-07-30

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