ID   XYLA_BIFLD              Reviewed;         449 AA.
AC   B3DR33;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   22-JUL-2008, sequence version 1.
DT   10-JUN-2026, entry version 81.
DE   RecName: Full=Xylose isomerase {ECO:0000255|HAMAP-Rule:MF_00455};
DE            EC=5.3.1.5 {ECO:0000255|HAMAP-Rule:MF_00455};
GN   Name=xylA {ECO:0000255|HAMAP-Rule:MF_00455};
GN   OrderedLocusNames=BLD_1871;
OS   Bifidobacterium longum (strain DJO10A).
OC   Bacteria; Bacillati; Actinomycetota; Actinomycetes; Bifidobacteriales;
OC   Bifidobacteriaceae; Bifidobacterium.
OX   NCBI_TaxID=205913;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DJO10A;
RX   PubMed=18505588; DOI=10.1186/1471-2164-9-247;
RA   Lee J.H., Karamychev V.N., Kozyavkin S.A., Mills D., Pavlov A.R.,
RA   Pavlova N.V., Polouchine N.N., Richardson P.M., Shakhova V.V.,
RA   Slesarev A.I., Weimer B., O'Sullivan D.J.;
RT   "Comparative genomic analysis of the gut bacterium Bifidobacterium longum
RT   reveals loci susceptible to deletion during pure culture growth.";
RL   BMC Genomics 9:247-247(2008).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=alpha-D-xylose = alpha-D-xylulofuranose; Xref=Rhea:RHEA:22816,
CC         ChEBI:CHEBI:28518, ChEBI:CHEBI:188998; EC=5.3.1.5;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00455};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00455};
CC       Note=Binds 2 magnesium ions per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00455};
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_00455}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00455}.
CC   -!- SIMILARITY: Belongs to the xylose isomerase family. {ECO:0000255|HAMAP-
CC       Rule:MF_00455}.
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DR   EMBL; CP000605; ACD99316.1; -; Genomic_DNA.
DR   RefSeq; WP_007052420.1; NC_010816.1.
DR   AlphaFoldDB; B3DR33; -.
DR   SMR; B3DR33; -.
DR   KEGG; blj:BLD_1871; -.
DR   HOGENOM; CLU_037261_1_0_11; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0009045; F:xylose isomerase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0042732; P:D-xylose metabolic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.20.20.150; Divalent-metal-dependent TIM barrel enzymes; 1.
DR   HAMAP; MF_00455; Xylose_isom_A; 1.
DR   InterPro; IPR036237; Xyl_isomerase-like_sf.
DR   InterPro; IPR013022; Xyl_isomerase-like_TIM-brl.
DR   InterPro; IPR013452; XylA_bac.
DR   InterPro; IPR001998; Xylose_isomerase.
DR   NCBIfam; NF003998; PRK05474.1; 1.
DR   NCBIfam; TIGR02630; xylose_isom_A; 1.
DR   PANTHER; PTHR48408; -; 1.
DR   PANTHER; PTHR48408:SF1; XYLOSE ISOMERASE; 1.
DR   Pfam; PF01261; AP_endonuc_2; 1.
DR   Pfam; PF27526; XylA2_C; 1.
DR   PRINTS; PR00688; XYLOSISMRASE.
DR   SUPFAM; SSF51658; Xylose isomerase-like; 1.
DR   PROSITE; PS51415; XYLOSE_ISOMERASE; 1.
PE   3: Inferred from homology;
KW   Carbohydrate metabolism; Cytoplasm; Isomerase; Magnesium; Metal-binding;
KW   Xylose metabolism.
FT   CHAIN           1..449
FT                   /note="Xylose isomerase"
FT                   /id="PRO_1000200278"
FT   ACT_SITE        101
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   ACT_SITE        104
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         232
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         268
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         268
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         271
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         296
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         307
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         309
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
FT   BINDING         340
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00455"
SQ   SEQUENCE   449 AA;  50918 MW;  01BA6BD5C6C13937 CRC64;
     MGLWDVDKIE YVGRAKGPKE DFAFHYYDAD KVVAGKKMKD WLRFGVAWWH TFNQELVDPF
     GTGTAHRPYY KYTDPMDQAL AKVDYAFELF QKLGVEYFCF HDRDIAPEGD TLRETNANLD
     KVVDKIEENM KSTGVKLLWN TSSLFTNPRF VSGAATSPFA DIYAYAGGQL KKSLEIGKRL
     GAENYVFWGG REGYENLWNT EMKRETDHIA KFFHMCADYA KEIGFEAQFL IEPKPKEPTL
     HQYDFDAATA IEFLRNHDLT DVFKLNLEGN HANLAGHTYQ HEIRVARESG FLGSLDANQG
     DKLIGWDMDE FPTDLYETVA VMWEVLQAGS IGPHGGLNFD AKPRRTSFYE EDLFRSHIAG
     MDTYAAGLLV ADKMNQDGFI QDLMAERYSS YDSGIGKDID EGNVTLADLE AYSLDKPQSE
     LIAATKSDHL ESVKATINNY IIDALSEVE
//