ID   BGAM_LATSK              Reviewed;         318 AA.
AC   Q48847;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 70.
DE   RecName: Full=Beta-galactosidase small subunit;
DE            Short=Beta-gal small subunit;
DE            EC=3.2.1.23;
DE   AltName: Full=Lactase small subunit;
GN   Name=lacM;
OS   Latilactobacillus sakei (Lactobacillus sakei).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Lactobacillaceae;
OC   Latilactobacillus.
OX   NCBI_TaxID=1599;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 15521 / DSM 20017 / JCM 1157 / CCUG 30501 / CIP 103139 / KCTC
RC   3603 / NBRC 15893 / NCIMB 13090 / T.S;
RX   PubMed=8574399; DOI=10.1099/13500872-141-12-3059;
RA   Obst M., Meding E.R., Vogel R.F., Hammes W.P.;
RT   "Two genes encoding the beta-galactosidase of Lactobacillus sake.";
RL   Microbiology 141:3059-3066(1995).
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   -!- SUBUNIT: Heterodimer of a large and a small subunit.
CC   -!- SIMILARITY: Belongs to the bacterial beta-galactosidase small subunit
CC       family. {ECO:0000305}.
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DR   EMBL; X82287; CAA57731.1; -; Genomic_DNA.
DR   RefSeq; WP_025015979.1; NZ_LT907933.1.
DR   AlphaFoldDB; Q48847; -.
DR   SMR; Q48847; -.
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:0005975; P:carbohydrate metabolic process; IEA:InterPro.
DR   Gene3D; 2.70.98.10; -; 1.
DR   InterPro; IPR004199; B-gal_small/dom_5.
DR   InterPro; IPR011013; Gal_mutarotase_sf_dom.
DR   InterPro; IPR014718; GH-type_carb-bd.
DR   Pfam; PF02929; Bgal_small_N; 1.
DR   SMART; SM01038; Bgal_small_N; 1.
DR   SUPFAM; SSF74650; SSF74650; 1.
PE   3: Inferred from homology;
KW   Glycosidase; Hydrolase.
FT   CHAIN           1..318
FT                   /note="Beta-galactosidase small subunit"
FT                   /id="PRO_0000057671"
SQ   SEQUENCE   318 AA;  35254 MW;  6F55CDB90F67FC75 CRC64;
     MANTNKRLAV IFGDVTLGLK GPDFHYLFSY QTGGPESLRI QGKEWLYRSP KPTFWRATTD
     NDRGNQFPLK SGMWLAADQF IACQSITVAI DGQTIPLPIA PENNRYSGRE TAQEVTVTYT
     YQTITTPQTT VEVSYTIQAS GKIRVAVTYH GQAGLPSLPV FGLRFVMPTP ATRFIYQGLS
     GETYPDRMAG GIAGEYEVTG LPVTPYLVPQ DCGVHMATDW VTIYRQAVLD NCLHEPVETG
     LKFKMVDQPF AFSCLPYTAE ELENATHHSE LPAPHRTVLN LLGAVRGVGG IDSWGSDVEV
     AYQIDATQDR HFEFEISF