BGAL_YERPB
ID BGAL_YERPB Reviewed; 1066 AA.
AC B2K6E6;
DT 24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT 10-JUN-2008, sequence version 1.
DT 03-AUG-2022, entry version 76.
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}; OrderedLocusNames=YPTS_2494;
OS Yersinia pseudotuberculosis serotype IB (strain PB1/+).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Yersiniaceae; Yersinia.
OX NCBI_TaxID=502801;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PB1/+;
RA Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA Bruce D., Goodwin L., Pitluck S., Munk A.C., Brettin T., Detter J.C.,
RA Han C., Tapia R., Schmutz J., Larimer F., Land M., Hauser L.,
RA Challacombe J.F., Green L., Lindler L.E., Nikolich M.P., Richardson P.;
RT "Complete sequence of Yersinia pseudotuberculosis PB1/+.";
RL Submitted (APR-2008) to the EMBL/GenBank/DDBJ databases.
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;
CC Evidence={ECO:0000255|HAMAP-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;
CC Evidence={ECO:0000255|HAMAP-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}.
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DR EMBL; CP001048; ACC89455.1; -; Genomic_DNA.
DR RefSeq; WP_011192578.1; NZ_CP009780.1.
DR AlphaFoldDB; B2K6E6; -.
DR SMR; B2K6E6; -.
DR CAZy; GH2; Glycoside Hydrolase Family 2.
DR GeneID; 66841154; -.
DR KEGG; ypb:YPTS_2494; -.
DR PATRIC; fig|502801.10.peg.1906; -.
DR OMA; SNWQLQG; -.
DR BioCyc; YPSE502801:YPTS_RS12600-MON; -.
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:0016052; P:carbohydrate catabolic process; IEA:UniProt.
DR Gene3D; 2.60.40.10; -; 2.
DR Gene3D; 2.70.98.10; -; 1.
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 Pfam; PF02929; Bgal_small_N; 1.
DR Pfam; PF16353; DUF4981; 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 PRINTS; PR00132; GLHYDRLASE2.
DR SMART; SM01038; Bgal_small_N; 1.
DR SUPFAM; SSF49303; SSF49303; 2.
DR SUPFAM; SSF49785; SSF49785; 1.
DR SUPFAM; SSF51445; SSF51445; 1.
DR SUPFAM; SSF74650; SSF74650; 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; Sodium.
FT CHAIN 1..1066
FT /note="Beta-galactosidase"
FT /id="PRO_0000367021"
FT ACT_SITE 477
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT ACT_SITE 553
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 110
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 209
FT /ligand="Na(+)"
FT /ligand_id="ChEBI:CHEBI:29101"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 209
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 432
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 434
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 477
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 477
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 553..556
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 613
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 617
FT /ligand="Na(+)"
FT /ligand_id="ChEBI:CHEBI:29101"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 620
FT /ligand="Na(+)"
FT /ligand_id="ChEBI:CHEBI:29101"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 620
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT BINDING 1041
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT SITE 373
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
FT SITE 407
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01687"
SQ SEQUENCE 1066 AA; 123480 MW; 6BF435A8129D49D4 CRC64;
MTSQEKVPFQ VQLSLPQILS RRDWENPQIT QYHRLEAHPP FHSWRDVESA QKDRPSPQQQ
TLNGLWSFSY FTQPEAVPEH WVRCDLAEAK PLPVPANWQL HGYDAPIYTN IQYPIPVNPP
RVPDLNPTGC YSRDFTLEPS WLASGKTRII FDGVSSAFYL WCNGQWVGYS QDSRLPAEFD
LTPYLQAGSN RIAVLVLRWS DGSYLEDQDM WRMSGIFRDV KLLHKPEIHL RDIHIMTHLS
PEFTSANLEV MAAVNIPSLQ LNDPQVTGSY QLRVQLWLAD KLVASLQQPL GTQAIDERGP
YTDRTQLVLR IDQPLLWSAE QPTLYRAVVS LLNHQQELIE AEAYDVGFRQ VAIHQGLLKI
NGKAVLIRGV NRHEHHPQTG QAIDEESLLQ DILLMKQHNF NAVRCSHYPN HPLWYRLCDR
YGLYVVDEAN IETHGMQPMS RLSDDPSWFS AFSERVTRMV QRDRNHPCII IWSLGNESGH
GATHDALYRW IKTNDPTRPV QYEGGGANTL ATDILCPMYA RVDEDQPFPA VPKWSIKKWI
GLPNESRPLI LCEYAHAMGN SFGGFARYWQ AFRQYPRLQG GFIWDWVDQS LTHHNDHGQP
YWAYGGDFGD TPNDRQFCMN GLVFPDRSPH PSLYEAQCAQ QFFQFSLLST TPLVINITSE
YLFRESDNEQ LYWRIMLEGE SVLEGSQPLN LSPESSQCYR LAEKLPTLNK PGQLWLNVEI
RQPKETPWSP AQHRSAWHQW RLPQPLFSPS SDLTNATAHY APQLQHNLQL QHNRQLQHDL
QLQQDEQHIK VTYQQQCWQF SRQTGRLDQW WVADKPMLLR PLQDQFVRAP LDNDIGISEA
THIDPNAWVE RWKKAGMYQL QQRCLSLHVD HLSHSVQISA EYGYEFEQEP LLHSHWVYRF
DRHGRMTIDV NVRIATSLPA PARIGMCCQL ADISPTVEWL GLGPHENYPD RQLAAQYGHW
SLPLEQMHTA YIFPSENGLR CNTHTLNYGR WTLTGDFHFG ISRYSTQQLM VTSHQHLLEP
EEGTWLNIDG FHMGVGGDDS WSPSVHIDDI LTRETYQYQI CWQYKV
