ID F4VAC3_ECOLX Unreviewed; 1024 AA.
AC F4VAC3;
DT 28-JUN-2011, integrated into UniProtKB/TrEMBL.
DT 28-JUN-2011, sequence version 1.
DT 27-MAR-2024, entry version 55.
DE RecName: Full=Beta-galactosidase {ECO:0000256|ARBA:ARBA00012756, ECO:0000256|HAMAP-Rule:MF_01687};
DE Short=Beta-gal {ECO:0000256|HAMAP-Rule:MF_01687};
DE EC=3.2.1.23 {ECO:0000256|ARBA:ARBA00012756, ECO:0000256|HAMAP-Rule:MF_01687};
DE AltName: Full=Lactase {ECO:0000256|ARBA:ARBA00032230, ECO:0000256|HAMAP-Rule:MF_01687};
GN Name=lacZ {ECO:0000256|HAMAP-Rule:MF_01687};
GN ORFNames=ECPG_03155 {ECO:0000313|EMBL:EGI47349.1};
OS Escherichia coli H591.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Escherichia.
OX NCBI_TaxID=656408 {ECO:0000313|EMBL:EGI47349.1, ECO:0000313|Proteomes:UP000004681};
RN [1] {ECO:0000313|EMBL:EGI47349.1, ECO:0000313|Proteomes:UP000004681}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=H591 {ECO:0000313|EMBL:EGI47349.1,
RC ECO:0000313|Proteomes:UP000004681};
RG The Broad Institute Genome Sequencing Platform;
RG The Broad Institute Genome Sequencing Center for Infectious Disease;
RA Feldgarden M., Gordon D.M., Johnson J.R., Johnston B.D., Young S., Zeng Q.,
RA Koehrsen M., Alvarado L., Berlin A.M., Borenstein D., Chapman S.B.,
RA Chen Z., Engels R., Freedman E., Gellesch M., Goldberg J., Griggs A.,
RA Gujja S., Heilman E.R., Heiman D.I., Hepburn T.A., Howarth C., Jen D.,
RA Larson L., Lewis B., Mehta T., Park D., Pearson M., Richards J.,
RA Roberts A., Saif S., Shea T.D., Shenoy N., Sisk P., Stolte C., Sykes S.N.,
RA Walk T., White J., Yandava C., Haas B., Henn M.R., Nusbaum C., Birren B.;
RT "The Genome Sequence of Escherichia coli H591.";
RL Submitted (JAN-2010) 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;
CC Evidence={ECO:0000256|ARBA:ARBA00001412, ECO:0000256|HAMAP-
CC Rule:MF_01687};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01687};
CC Note=Binds 2 magnesium ions per monomer. {ECO:0000256|HAMAP-
CC Rule:MF_01687};
CC -!- COFACTOR:
CC Name=Na(+); Xref=ChEBI:CHEBI:29101;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01687};
CC Note=Binds 1 sodium ion per monomer. {ECO:0000256|HAMAP-Rule:MF_01687};
CC -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_01687}.
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 2 family.
CC {ECO:0000256|ARBA:ARBA00007401, ECO:0000256|HAMAP-Rule:MF_01687}.
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DR EMBL; GL884418; EGI47349.1; -; Genomic_DNA.
DR RefSeq; WP_000177918.1; NZ_GL884418.1.
DR AlphaFoldDB; F4VAC3; -.
DR GeneID; 66671352; -.
DR HOGENOM; CLU_002346_0_2_6; -.
DR Proteomes; UP000004681; Unassembled WGS sequence.
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 {ECO:0000256|ARBA:ARBA00023295, ECO:0000256|HAMAP-
KW Rule:MF_01687};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_01687};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01687};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01687};
KW Sodium {ECO:0000256|ARBA:ARBA00023053, ECO:0000256|HAMAP-Rule:MF_01687}.
FT DOMAIN 749..1022
FT /note="Beta galactosidase small chain/"
FT /evidence="ECO:0000259|SMART:SM01038"
FT ACT_SITE 462
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT ACT_SITE 538
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 103
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 202
FT /ligand="Na(+)"
FT /ligand_id="ChEBI:CHEBI:29101"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 202
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 417
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 419
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 462
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 462
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 538..541
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 598
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 602
FT /ligand="Na(+)"
FT /ligand_id="ChEBI:CHEBI:29101"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 605
FT /ligand="Na(+)"
FT /ligand_id="ChEBI:CHEBI:29101"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 605
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT BINDING 1000
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT SITE 358
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
FT SITE 392
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01687"
SQ SEQUENCE 1024 AA; 116472 MW; E6A13DC9605CB6F3 CRC64;
MTMITDSLAV VLQRRDWENP GVTQLNRLAA HPPFASWRNS EEARTDRPSQ QLRSLNGEWR
FAWFPAPEAV PESWLECDLP EADTVVVPSN WQMHGYDAPI YTNVTYPITV NPPFVPTENP
TGCYSLTFNV DESWLQEGQT RIIFDGVNSA FHLWCNGRWV GYGQDSRLPS EFDLSAFLRA
GENRLAVMVL RWSDGSYLED QDMWRMSGIF RDVSLLHKPT TQISDFHVAT RFNDDFSRAV
LEAEVQMCGE LRDYLRVTVS LWQGETQVAS GTAPFGGEII DERGSYADRV TLRLNVENPK
LWSAEIPNLY RAVVELHTAD GTLIEAEACD VGFREVRIEN GLLLLNGKPL LIRGVNRHEH
HPLHGQVMDE QTMVQDILLM KQNNFNAVRC SHYPNHPLWY TLCDRYGLYV VDEANIETHG
MVPMNRLTDD PRWLPAMSER VTRMVQRDRN HPSVIIWSLG NESGHGANHD ALYRWIKSVD
PSRPVQYEGG GADTTATDII CPMYARVDED QPFPAVPKWS IKKWLSLPGE TRPLILCEYA
HAMGNSLGGF AKYWQAFRQY PRLQGGFVWD WVDQSLIKYD ENGNPWSAYG GDFGDTPNDR
QFCMNGLVFA DRTPHPALTE AKHQQQFFQF RLSGQTIEVT SEYLFRHSDN ELLHWMVALD
GKPLASGEVP LDVAPQGKQL IELPELPQPE SAGQLWLTVR VVQPNATAWS EAGHISAWQQ
WRLAENLSVT LPSASHIIPQ LTTSETDFCI ELGNKRWQFN RQSGLLSQMW IGDEKQLLTP
LRDQFTRAPL DNDIGVSEAT RIDPNAWVER WKAAGHYQAE AALLQCSADT LADAVLITTA
HAWQHQGKTL FISRKTYRID GSGQMAITVD VEVASDTPHP ARIGLTCQLA QVAERVNWLG
LGPQENYPDR LTAACFDRWD LPLSDMYTPY VFPSENGLRC GTRELNYGPH QWRGDFQFNI
SRYSQQQLME TSHRHLLHAE EGTWLNIDGF HMGIGGDDSW SPSVSAEFQL SAGRYHYQLV
WCQK
//
