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1LQF

Structure of PTP1b in Complex with a Peptidic Bisphosphonate Inhibitor

Functional Information from GO Data
ChainGOidnamespacecontents
A0004725molecular_functionprotein tyrosine phosphatase activity
A0006470biological_processprotein dephosphorylation
A0016311biological_processdephosphorylation
B0004725molecular_functionprotein tyrosine phosphatase activity
B0006470biological_processprotein dephosphorylation
B0016311biological_processdephosphorylation
C0004725molecular_functionprotein tyrosine phosphatase activity
C0006470biological_processprotein dephosphorylation
C0016311biological_processdephosphorylation
D0004725molecular_functionprotein tyrosine phosphatase activity
D0006470biological_processprotein dephosphorylation
D0016311biological_processdephosphorylation
Functional Information from PDB Data
site_idAC1
Number of Residues19
DetailsBINDING SITE FOR RESIDUE BGD A 802
ChainResidue
AARG545
ASER716
AALA717
AGLY718
AILE719
AGLY720
AARG721
AGLN762
AHOH3068
AHOH3324
BGLN666
ATYR546
AARG547
AASP548
ASER618
ALEU619
AASP681
APHE682
ACYS715

site_idAC2
Number of Residues18
DetailsBINDING SITE FOR RESIDUE BGD B 803
ChainResidue
BARG545
BTYR546
BARG547
BASP548
BSER618
BLEU619
BASP681
BPHE682
BCYS715
BSER716
BALA717
BGLY718
BILE719
BGLY720
BARG721
BGLN762
BHOH3150
BHOH3491

site_idAC3
Number of Residues15
DetailsBINDING SITE FOR RESIDUE BGD C 804
ChainResidue
CTYR546
CARG547
CASP548
CSER618
CPHE682
CCYS715
CSER716
CALA717
CGLY718
CILE719
CGLY720
CARG721
CGLN762
CHOH3219
CHOH3418

site_idAC4
Number of Residues19
DetailsBINDING SITE FOR RESIDUE BGD D 805
ChainResidue
DARG545
DTYR546
DARG547
DASP548
DSER618
DLEU619
DLYS620
DASP681
DPHE682
DCYS715
DSER716
DALA717
DGLY718
DILE719
DGLY720
DARG721
DGLN762
DHOH3275
DHOH3280

Functional Information from PROSITE/UniProt
site_idPS00383
Number of Residues11
DetailsTYR_PHOSPHATASE_1 Tyrosine specific protein phosphatases active site. VHCsaGigRSG
ChainResidueDetails
AVAL713-GLY723

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1096
DetailsDomain: {"description":"Tyrosine-protein phosphatase","evidences":[{"source":"PROSITE-ProRule","id":"PRU00160","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues4
DetailsActive site: {"description":"Phosphocysteine intermediate"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues4
DetailsBinding site: {}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues28
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues4
DetailsModified residue: {"description":"N-acetylmethionine","evidences":[{"source":"PubMed","id":"2546149","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues4
DetailsModified residue: {"description":"Phosphotyrosine","evidences":[{"source":"PubMed","id":"15592455","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues4
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_FI8
Number of Residues4
DetailsModified residue: {"description":"Phosphotyrosine; by EGFR","evidences":[{"source":"PubMed","id":"9355745","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues4
DetailsModified residue: {"description":"S-nitrosocysteine; in reversibly inhibited form","evidences":[{"source":"PubMed","id":"22169477","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues8
DetailsModified residue: {"description":"Phosphoserine; by CLK1 and CLK2","evidences":[{"source":"PubMed","id":"10480872","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI11
Number of Residues8
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 Residues3
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
AARG721
ACYS715
AASP681

site_idCSA2
Number of Residues3
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
BARG721
BCYS715
BASP681

site_idCSA3
Number of Residues3
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
CARG721
CCYS715
CASP681

site_idCSA4
Number of Residues3
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
DARG721
DCYS715
DASP681

site_idCSA5
Number of Residues4
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
AARG721
ASER722
ACYS715
AASP681

site_idCSA6
Number of Residues4
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
BARG721
BSER722
BCYS715
BASP681

site_idCSA7
Number of Residues4
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
CARG721
CSER722
CCYS715
CASP681

site_idCSA8
Number of Residues4
DetailsAnnotated By Reference To The Literature 1d5r
ChainResidueDetails
DARG721
DSER722
DCYS715
DASP681

site_idMCSA1
Number of Residues5
DetailsM-CSA 469
ChainResidueDetails
AASP681proton shuttle (general acid/base)
ACYS715covalent catalysis
AARG721activator, electrostatic stabiliser
ASER722activator, electrostatic stabiliser
AGLN762steric role

site_idMCSA2
Number of Residues5
DetailsM-CSA 469
ChainResidueDetails
BASP681proton shuttle (general acid/base)
BCYS715covalent catalysis
BARG721activator, electrostatic stabiliser
BSER722activator, electrostatic stabiliser
BGLN762steric role

site_idMCSA3
Number of Residues5
DetailsM-CSA 469
ChainResidueDetails
CASP681proton shuttle (general acid/base)
CCYS715covalent catalysis
CARG721activator, electrostatic stabiliser
CSER722activator, electrostatic stabiliser
CGLN762steric role

site_idMCSA4
Number of Residues5
DetailsM-CSA 469
ChainResidueDetails
DASP681proton shuttle (general acid/base)
DCYS715covalent catalysis
DARG721activator, electrostatic stabiliser
DSER722activator, electrostatic stabiliser
DGLN762steric role

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PDB entries from 2026-03-25

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