ID   LACA1_STRP1             Reviewed;         141 AA.
AC   Q99YH1; Q48XA9;
DT   20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2001, sequence version 1.
DT   25-MAY-2022, entry version 122.
DE   RecName: Full=Galactose-6-phosphate isomerase subunit LacA 1 {ECO:0000255|HAMAP-Rule:MF_01555};
DE            EC=5.3.1.26 {ECO:0000255|HAMAP-Rule:MF_01555};
GN   Name=lacA1 {ECO:0000255|HAMAP-Rule:MF_01555}; Synonyms=lacA.1;
GN   OrderedLocusNames=SPy_1708, M5005_Spy1398;
OS   Streptococcus pyogenes serotype M1.
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=301447;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700294 / SF370 / Serotype M1;
RX   PubMed=11296296; DOI=10.1073/pnas.071559398;
RA   Ferretti J.J., McShan W.M., Ajdic D.J., Savic D.J., Savic G., Lyon K.,
RA   Primeaux C., Sezate S., Suvorov A.N., Kenton S., Lai H.S., Lin S.P.,
RA   Qian Y., Jia H.G., Najar F.Z., Ren Q., Zhu H., Song L., White J., Yuan X.,
RA   Clifton S.W., Roe B.A., McLaughlin R.E.;
RT   "Complete genome sequence of an M1 strain of Streptococcus pyogenes.";
RL   Proc. Natl. Acad. Sci. U.S.A. 98:4658-4663(2001).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-947 / MGAS5005 / Serotype M1;
RX   PubMed=16088826; DOI=10.1086/432514;
RA   Sumby P., Porcella S.F., Madrigal A.G., Barbian K.D., Virtaneva K.,
RA   Ricklefs S.M., Sturdevant D.E., Graham M.R., Vuopio-Varkila J., Hoe N.P.,
RA   Musser J.M.;
RT   "Evolutionary origin and emergence of a highly successful clone of serotype
RT   M1 group A Streptococcus involved multiple horizontal gene transfer
RT   events.";
RL   J. Infect. Dis. 192:771-782(2005).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=aldehydo-D-galactose 6-phosphate = keto-D-tagatose 6-
CC         phosphate; Xref=Rhea:RHEA:13033, ChEBI:CHEBI:58255,
CC         ChEBI:CHEBI:134283; EC=5.3.1.26; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01555};
CC   -!- PATHWAY: Carbohydrate metabolism; D-galactose 6-phosphate degradation;
CC       D-tagatose 6-phosphate from D-galactose 6-phosphate: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01555}.
CC   -!- SUBUNIT: Heteromultimeric protein consisting of LacA and LacB.
CC       {ECO:0000255|HAMAP-Rule:MF_01555}.
CC   -!- SIMILARITY: Belongs to the LacAB/RpiB family. {ECO:0000255|HAMAP-
CC       Rule:MF_01555}.
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DR   EMBL; AE004092; AAK34456.1; -; Genomic_DNA.
DR   EMBL; CP000017; AAZ52016.1; -; Genomic_DNA.
DR   RefSeq; NP_269735.1; NC_002737.2.
DR   AlphaFoldDB; Q99YH1; -.
DR   SMR; Q99YH1; -.
DR   STRING; 1314.HKU360_01452; -.
DR   PaxDb; Q99YH1; -.
DR   EnsemblBacteria; AAK34456; AAK34456; SPy_1708.
DR   KEGG; spy:SPy_1708; -.
DR   KEGG; spz:M5005_Spy1398; -.
DR   PATRIC; fig|160490.10.peg.1485; -.
DR   HOGENOM; CLU_091396_4_2_9; -.
DR   OMA; RCAIVSE; -.
DR   UniPathway; UPA00702; UER00714.
DR   Proteomes; UP000000750; Chromosome.
DR   GO; GO:0050044; F:galactose-6-phosphate isomerase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019388; P:galactose catabolic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0019512; P:lactose catabolic process via tagatose-6-phosphate; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.1400.10; -; 1.
DR   HAMAP; MF_01555; LacA; 1.
DR   InterPro; IPR004783; LacA.
DR   InterPro; IPR003500; RpiB_LacA_LacB.
DR   InterPro; IPR036569; RpiB_LacA_LacB_sf.
DR   PANTHER; PTHR30345; PTHR30345; 1.
DR   Pfam; PF02502; LacAB_rpiB; 1.
DR   PIRSF; PIRSF005384; RpiB_LacA_B; 1.
DR   SUPFAM; SSF89623; SSF89623; 1.
DR   TIGRFAMs; TIGR01118; lacA; 1.
DR   TIGRFAMs; TIGR00689; rpiB_lacA_lacB; 1.
PE   3: Inferred from homology;
KW   Isomerase; Lactose metabolism; Reference proteome.
FT   CHAIN           1..141
FT                   /note="Galactose-6-phosphate isomerase subunit LacA 1"
FT                   /id="PRO_0000208122"
SQ   SEQUENCE   141 AA;  15126 MW;  F6AB15F076C53F73 CRC64;
     MAIILGADAH GNALKELIKS FLQEEGYDII DVTDINSDFI DNTLAVAKAV NEAEGRLGIM
     VDAYGAGPFM VATKLKGMVA AEVSDERSAY MTRGHNNARM ITIGAEIVGP ELAKNIVKGF
     VTGPYDGGRH QIRVDMLNKM A