ID BGAL_SHIDS Reviewed; 1024 AA. AC Q32JB6; DT 24-MAR-2009, integrated into UniProtKB/Swiss-Prot. DT 24-MAR-2009, sequence version 2. DT 27-MAR-2024, entry version 94. DE RecName: Full=Beta-galactosidase {ECO:0000255|HAMAP-Rule:MF_01687}; DE Short=Beta-gal {ECO:0000255|HAMAP-Rule:MF_01687}; DE EC=3.2.1.23 {ECO:0000255|HAMAP-Rule:MF_01687}; DE AltName: Full=Lactase {ECO:0000255|HAMAP-Rule:MF_01687}; GN Name=lacZ {ECO:0000255|HAMAP-Rule:MF_01687}; GN OrderedLocusNames=SDY_0378; OS Shigella dysenteriae serotype 1 (strain Sd197). OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales; OC Enterobacteriaceae; Shigella. OX NCBI_TaxID=300267; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=Sd197; RX PubMed=16275786; DOI=10.1093/nar/gki954; RA Yang F., Yang J., Zhang X., Chen L., Jiang Y., Yan Y., Tang X., Wang J., RA Xiong Z., Dong J., Xue Y., Zhu Y., Xu X., Sun L., Chen S., Nie H., Peng J., RA Xu J., Wang Y., Yuan Z., Wen Y., Yao Z., Shen Y., Qiang B., Hou Y., Yu J., RA Jin Q.; RT "Genome dynamics and diversity of Shigella species, the etiologic agents of RT bacillary dysentery."; RL Nucleic Acids Res. 33:6445-6458(2005). CC -!- CATALYTIC ACTIVITY: CC Reaction=Hydrolysis of terminal non-reducing beta-D-galactose residues CC in beta-D-galactosides.; EC=3.2.1.23; Evidence={ECO:0000255|HAMAP- CC Rule:MF_01687}; CC -!- COFACTOR: CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP- CC Rule:MF_01687}; CC Note=Binds 2 magnesium ions per monomer. {ECO:0000255|HAMAP- CC Rule:MF_01687}; CC -!- COFACTOR: CC Name=Na(+); Xref=ChEBI:CHEBI:29101; Evidence={ECO:0000255|HAMAP- CC Rule:MF_01687}; CC Note=Binds 1 sodium ion per monomer. {ECO:0000255|HAMAP-Rule:MF_01687}; CC -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_01687}. CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 2 family. CC {ECO:0000255|HAMAP-Rule:MF_01687}. CC -!- SEQUENCE CAUTION: CC Sequence=ABB60591.1; Type=Erroneous initiation; Evidence={ECO:0000305}; CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; CP000034; ABB60591.1; ALT_INIT; Genomic_DNA. DR AlphaFoldDB; Q32JB6; -. DR SMR; Q32JB6; -. DR STRING; 300267.SDY_0378; -. DR CAZy; GH2; Glycoside Hydrolase Family 2. DR EnsemblBacteria; ABB60591; ABB60591; SDY_0378. DR KEGG; sdy:SDY_0378; -. DR HOGENOM; CLU_002346_0_2_6; -. DR Proteomes; UP000002716; Chromosome. DR GO; GO:0009341; C:beta-galactosidase complex; IEA:InterPro. DR GO; GO:0004565; F:beta-galactosidase activity; IEA:UniProtKB-EC. DR GO; GO:0030246; F:carbohydrate binding; IEA:InterPro. DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule. DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:InterPro. DR GO; GO:1901575; P:organic substance catabolic process; IEA:UniProt. DR Gene3D; 2.70.98.10; -; 1. DR Gene3D; 2.60.120.260; Galactose-binding domain-like; 1. DR Gene3D; 3.20.20.80; Glycosidases; 1. DR Gene3D; 2.60.40.10; Immunoglobulins; 2. DR HAMAP; MF_01687; Beta_gal; 1. DR InterPro; IPR004199; B-gal_small/dom_5. DR InterPro; IPR036156; Beta-gal/glucu_dom_sf. DR InterPro; IPR011013; Gal_mutarotase_sf_dom. DR InterPro; IPR008979; Galactose-bd-like_sf. DR InterPro; IPR014718; GH-type_carb-bd. DR InterPro; IPR006101; Glyco_hydro_2. DR InterPro; IPR023232; Glyco_hydro_2_AS. DR InterPro; IPR023933; Glyco_hydro_2_beta_Galsidase. DR InterPro; IPR006103; Glyco_hydro_2_cat. DR InterPro; IPR023230; Glyco_hydro_2_CS. DR InterPro; IPR006102; Glyco_hydro_2_Ig-like. DR InterPro; IPR006104; Glyco_hydro_2_N. DR InterPro; IPR017853; Glycoside_hydrolase_SF. DR InterPro; IPR013783; Ig-like_fold. DR InterPro; IPR032312; LacZ_4. DR PANTHER; PTHR46323; BETA-GALACTOSIDASE; 1. DR PANTHER; PTHR46323:SF2; BETA-GALACTOSIDASE; 1. DR Pfam; PF02929; Bgal_small_N; 1. DR Pfam; PF00703; Glyco_hydro_2; 1. DR Pfam; PF02836; Glyco_hydro_2_C; 1. DR Pfam; PF02837; Glyco_hydro_2_N; 1. DR Pfam; PF16353; LacZ_4; 1. DR PRINTS; PR00132; GLHYDRLASE2. DR SMART; SM01038; Bgal_small_N; 1. DR SUPFAM; SSF51445; (Trans)glycosidases; 1. DR SUPFAM; SSF49303; beta-Galactosidase/glucuronidase domain; 2. DR SUPFAM; SSF74650; Galactose mutarotase-like; 1. DR SUPFAM; SSF49785; Galactose-binding domain-like; 1. DR PROSITE; PS00719; GLYCOSYL_HYDROL_F2_1; 1. DR PROSITE; PS00608; GLYCOSYL_HYDROL_F2_2; 1. PE 3: Inferred from homology; KW Glycosidase; Hydrolase; Magnesium; Metal-binding; Reference proteome; KW Sodium. FT CHAIN 1..1024 FT /note="Beta-galactosidase" FT /id="PRO_0000367009" FT ACT_SITE 462 FT /note="Proton donor" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT ACT_SITE 538 FT /note="Nucleophile" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 103 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 202 FT /ligand="Na(+)" FT /ligand_id="ChEBI:CHEBI:29101" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 202 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 417 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /ligand_label="1" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 419 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /ligand_label="1" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 462 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /ligand_label="1" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 462 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 538..541 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 598 FT /ligand="Mg(2+)" FT /ligand_id="ChEBI:CHEBI:18420" FT /ligand_label="2" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 602 FT /ligand="Na(+)" FT /ligand_id="ChEBI:CHEBI:29101" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 605 FT /ligand="Na(+)" FT /ligand_id="ChEBI:CHEBI:29101" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 605 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT BINDING 1000 FT /ligand="substrate" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT SITE 358 FT /note="Transition state stabilizer" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" FT SITE 392 FT /note="Transition state stabilizer" FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687" SQ SEQUENCE 1024 AA; 116614 MW; D0D9021809CAA06A CRC64; MTMITDSLAV VLQRRDWENP GVTQLNRLAA HPPFASWRNS EEARTNRPSQ QLRSLNGEWQ FVWFPAPEAV PESWLECDLP VADTVVVPSN WQMHGYDAPI YTNVTYPITV NPPFVPTENP TGYYSLTFNV DESWLQEGQT RIIFDGVNSA FHLWCNGRWV GYGQDSRLPS EFDLSAFLRA GENRLAVMVL RWSDGSYLED QDMWRMSGIF RDVSLLHKPT TQIRDFHVAT RFNDDFSRAV LEAEVQMYGE LRDELRVTVS LWQGETQVAS GTAPFGGEII HERGGYADRV TLGLNVENPK LWSAEIPNIY RAVVELHTAD GTLIEAEACD VGFREVRIEN GLLLLNGKPL LIRGVNRHEH HPLHGQVMDE QTMVQDILLM KQNNFNAVRC SHYPNHPLWY TLCDRYGLYV VDEANIETHG MVPMNRLTDD PRWLPAMSER VTRMVQRDRN HPSVIIWSLG NESGHGANHD ALYRWIKSVD PSRPVQYEGG GADTSATDII CPMYARVDED QLFPAVPKWS IKKWLSLPGE TRPLILCEYA HAMGNSLGGF AKYWQAFRQY PRLQGGFVWD WVDQSLIKYD ENGNPWSAYG GDFGDTPNDR QFCMNGLVFA DRTPHPALTE AKHQQQFFQF RLSGRTIEVT SEYLFRQSDN ELLHWTVALD GKPLASSEVP MNVAPQGKQV IELPELPRLE STGQLWLTVH VVQPNATAWS EAGHISAWQQ WRLAANLSVT LPSAPHAIPQ LTTSETDFCI ELDNKRWQFN RQSGFLSQMW IGDEKQLLTP LRDQFTRAPL DNDIGVSEAT RIDPNAWVER WKAAGHYQAE AALLQCTADT LADAVLITTA HTWQHQGKTL FISRKTYRID GSGQMAITVD VEVASDTPHP ARIGLTCQLA QVAERVNWLG LGPQENYPDR LTAACFDRWD LPLSDMYTPY VFPSENGLRC GTRELNYGPH QWRGDFQFNI SRYSQQQLME TSHRHLLHAE EGTWLNIDGF HMGIGGDDSW SPSVSAEFQL SAGRYHYQLV WCQK //