ID   APHA_HAEP3              Reviewed;         235 AA.
AC   E1W3A7;
DT   25-JAN-2012, integrated into UniProtKB/Swiss-Prot.
DT   30-NOV-2010, sequence version 1.
DT   03-AUG-2022, entry version 54.
DE   RecName: Full=Class B acid phosphatase {ECO:0000250|UniProtKB:P0AE22, ECO:0000312|EMBL:CBW14847.1};
DE            Short=CBAP {ECO:0000250|UniProtKB:P0AE22};
DE            EC=3.1.3.2 {ECO:0000250|UniProtKB:P0AE22};
DE   Flags: Precursor;
GN   Name=aphA {ECO:0000250|UniProtKB:P0AE22}; OrderedLocusNames=PARA_07400;
OS   Haemophilus parainfluenzae (strain T3T1).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=862965;
RN   [1] {ECO:0000312|EMBL:CBW14847.1}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=T3T1;
RA   Crook D., Hood D., Moxon R., Parkhill J., Aslett M., Bentley S.D.;
RT   "The genome sequence of Haemophilus parainfluenzae T3T1.";
RL   Submitted (JUL-2010) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Dephosphorylates several organic phosphate monoesters. Also
CC       has a phosphotransferase activity catalyzing the transfer of low-energy
CC       phosphate groups from organic phosphate monoesters to free hydroxyl
CC       groups of various organic compounds (By similarity).
CC       {ECO:0000250|UniProtKB:P0AE22}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a phosphate monoester + H2O = an alcohol + phosphate;
CC         Xref=Rhea:RHEA:15017, ChEBI:CHEBI:15377, ChEBI:CHEBI:30879,
CC         ChEBI:CHEBI:43474, ChEBI:CHEBI:67140; EC=3.1.3.2;
CC         Evidence={ECO:0000250|UniProtKB:P0AE22};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000250|UniProtKB:P0AE22};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000250|UniProtKB:P0AE22};
CC   -!- SUBUNIT: Homotetramer. {ECO:0000250|UniProtKB:P0AE22}.
CC   -!- SUBCELLULAR LOCATION: Periplasm {ECO:0000250|UniProtKB:P0AE22}.
CC   -!- SIMILARITY: Belongs to the class B bacterial acid phosphatase family.
CC       {ECO:0000250|UniProtKB:P0AE22}.
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DR   EMBL; FQ312002; CBW14847.1; -; Genomic_DNA.
DR   RefSeq; WP_014064597.1; NC_015964.1.
DR   AlphaFoldDB; E1W3A7; -.
DR   SMR; E1W3A7; -.
DR   STRING; 862965.PARA_07400; -.
DR   PRIDE; E1W3A7; -.
DR   EnsemblBacteria; CBW14847; CBW14847; PARA_07400.
DR   KEGG; hpr:PARA_07400; -.
DR   PATRIC; fig|862965.3.peg.738; -.
DR   eggNOG; COG3700; Bacteria.
DR   HOGENOM; CLU_081496_0_0_6; -.
DR   OMA; PEFWEKM; -.
DR   OrthoDB; 1258380at2; -.
DR   Proteomes; UP000007052; Chromosome.
DR   GO; GO:0030288; C:outer membrane-bounded periplasmic space; IEA:InterPro.
DR   GO; GO:0003993; F:acid phosphatase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   CDD; cd07499; HAD_CBAP; 1.
DR   Gene3D; 3.40.50.1000; -; 1.
DR   InterPro; IPR005519; Acid_phosphat_B-like.
DR   InterPro; IPR036412; HAD-like_sf.
DR   InterPro; IPR010025; HAD-SF_ppase_IIIB_AphA.
DR   InterPro; IPR023214; HAD_sf.
DR   Pfam; PF03767; Acid_phosphat_B; 1.
DR   PIRSF; PIRSF017818; Acid_Ptase_B; 1.
DR   SFLD; SFLDG01127; C1.3:_Acid_Phosphatase_Like; 1.
DR   SUPFAM; SSF56784; SSF56784; 1.
DR   TIGRFAMs; TIGR01672; AphA; 1.
PE   3: Inferred from homology;
KW   Hydrolase; Magnesium; Metal-binding; Periplasm; Signal.
FT   SIGNAL          1..22
FT                   /evidence="ECO:0000255"
FT   CHAIN           23..235
FT                   /note="Class B acid phosphatase"
FT                   /evidence="ECO:0000255"
FT                   /id="PRO_0000415226"
FT   ACT_SITE        67
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
FT   ACT_SITE        69
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
FT   BINDING         67
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
FT   BINDING         69
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
FT   BINDING         135..136
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
FT   BINDING         175
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
FT   BINDING         190
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P0AE22"
SQ   SEQUENCE   235 AA;  26222 MW;  6F39B06DD55F912C CRC64;
     MKNLLKLSAI AILAASAVST FASNKEPYTE QGTNAREMTE QKPIHWISVE QLKKELEGKA
     PINVSFDIDD TVLFSSPCFY HGQEKYSPGK NDYLKNQDFW NEVNAGCDQY SIPKQIAVDL
     INMHQARGDQ IYFITGRTAG DKDGVTPVLQ KAFNIKDMHP VEFMGGRKLP TKYNKTPGII
     EHKVSIHYGD SDDDILAAKE AGIRGIRLMR AANSTYQPMP TLGGYGEEVL INSNY