ID   PTPB_STAAU              Reviewed;         139 AA.
AC   P0C5D3;
DT   11-SEP-2007, integrated into UniProtKB/Swiss-Prot.
DT   11-SEP-2007, sequence version 1.
DT   03-AUG-2022, entry version 67.
DE   RecName: Full=Low molecular weight protein-tyrosine-phosphatase PtpB;
DE            EC=3.1.3.48;
DE   AltName: Full=Phosphotyrosine phosphatase B;
DE            Short=PTPase B;
GN   Name=ptpB;
OS   Staphylococcus aureus.
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC   Staphylococcus.
OX   NCBI_TaxID=1280;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA], CHARACTERIZATION, CATALYTIC ACTIVITY,
RP   ACTIVITY REGULATION, AND BIOPHYSICOCHEMICAL PROPERTIES.
RC   STRAIN=Reynolds;
RX   PubMed=12193638; DOI=10.1128/jb.184.18.5194-5199.2002;
RA   Soulat D., Vaganay E., Duclos B., Genestier A.-L., Etienne J.,
RA   Cozzone A.J.;
RT   "Staphylococcus aureus contains two low-molecular-mass phosphotyrosine
RT   protein phosphatases.";
RL   J. Bacteriol. 184:5194-5199(2002).
CC   -!- FUNCTION: Dephosphorylates the phosphotyrosine-containing proteins.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] +
CC         phosphate; Xref=Rhea:RHEA:10684, Rhea:RHEA-COMP:10136, Rhea:RHEA-
CC         COMP:10137, ChEBI:CHEBI:15377, ChEBI:CHEBI:43474, ChEBI:CHEBI:46858,
CC         ChEBI:CHEBI:82620; EC=3.1.3.48;
CC         Evidence={ECO:0000269|PubMed:12193638};
CC   -!- ACTIVITY REGULATION: Inhibited by N-ethylmaleimide and sodium
CC       orthovanadate. {ECO:0000269|PubMed:12193638}.
CC   -!- BIOPHYSICOCHEMICAL PROPERTIES:
CC       Kinetic parameters:
CC         KM=1.5 mM for p-nitrophenyl-phosphate (at pH 6.2 and 37 degrees
CC         Celsius) {ECO:0000269|PubMed:12193638};
CC         Vmax=1.4 umol/min/mg enzyme (at pH 6.2 and 37 degrees Celsius)
CC         {ECO:0000269|PubMed:12193638};
CC       pH dependence:
CC         Optimum pH is 5.7-6.5. {ECO:0000269|PubMed:12193638};
CC       Temperature dependence:
CC         Optimum temperature is about 40 degrees Celsius.
CC         {ECO:0000269|PubMed:12193638};
CC   -!- SIMILARITY: Belongs to the low molecular weight phosphotyrosine protein
CC       phosphatase family. {ECO:0000305}.
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DR   RefSeq; WP_000697334.1; NZ_WYDB01000008.1.
DR   AlphaFoldDB; P0C5D3; -.
DR   SMR; P0C5D3; -.
DR   OMA; AFFPQKA; -.
DR   GO; GO:0004725; F:protein tyrosine phosphatase activity; IEA:UniProtKB-EC.
DR   GO; GO:0006470; P:protein dephosphorylation; IEA:InterPro.
DR   InterPro; IPR023485; Ptyr_pPase.
DR   InterPro; IPR036196; Ptyr_pPase_sf.
DR   InterPro; IPR017867; Tyr_phospatase_low_mol_wt.
DR   Pfam; PF01451; LMWPc; 1.
DR   PRINTS; PR00719; LMWPTPASE.
DR   SMART; SM00226; LMWPc; 1.
DR   SUPFAM; SSF52788; SSF52788; 1.
PE   1: Evidence at protein level;
KW   Hydrolase; Protein phosphatase.
FT   CHAIN           1..139
FT                   /note="Low molecular weight protein-tyrosine-phosphatase
FT                   PtpB"
FT                   /id="PRO_0000300670"
FT   ACT_SITE        7
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000250|UniProtKB:P11064"
FT   ACT_SITE        13
FT                   /evidence="ECO:0000250|UniProtKB:P11064"
FT   ACT_SITE        111
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000250|UniProtKB:P11064"
SQ   SEQUENCE   139 AA;  15788 MW;  63EB2C0E2A53EA5B CRC64;
     MKILFVCTGN TCRSPLAESI AKEVMPNHQF ESRGIFAVNN QGVSNYVEDL VEEHHLAETT
     LSQQFTEADL KADIILTMSY SHKELIEAHF GLQNHVFTLH EYVKEAGEVI DPYGGTKEMY
     VHTYEELVSL ILKLKDIIC