ID   RBSD_LACCB              Reviewed;         130 AA.
AC   B3W789;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 1.
DT   03-AUG-2022, entry version 73.
DE   RecName: Full=D-ribose pyranase {ECO:0000255|HAMAP-Rule:MF_01661};
DE            EC=5.4.99.62 {ECO:0000255|HAMAP-Rule:MF_01661};
GN   Name=rbsD {ECO:0000255|HAMAP-Rule:MF_01661}; OrderedLocusNames=LCABL_03220;
OS   Lacticaseibacillus casei (strain BL23) (Lactobacillus casei).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Lactobacillaceae;
OC   Lacticaseibacillus.
OX   NCBI_TaxID=543734;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=BL23;
RA   Maze A., Boel G., Bourand A., Loux V., Gibrat J.F., Zuniga M., Hartke A.,
RA   Deutscher J.;
RT   "Lactobacillus casei BL23 complete genome sequence.";
RL   Submitted (JUN-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the interconversion of beta-pyran and beta-furan
CC       forms of D-ribose. {ECO:0000255|HAMAP-Rule:MF_01661}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=beta-D-ribopyranose = beta-D-ribofuranose;
CC         Xref=Rhea:RHEA:25432, ChEBI:CHEBI:27476, ChEBI:CHEBI:47002;
CC         EC=5.4.99.62; Evidence={ECO:0000255|HAMAP-Rule:MF_01661};
CC   -!- PATHWAY: Carbohydrate metabolism; D-ribose degradation; D-ribose 5-
CC       phosphate from beta-D-ribopyranose: step 1/2. {ECO:0000255|HAMAP-
CC       Rule:MF_01661}.
CC   -!- SUBUNIT: Homodecamer. {ECO:0000255|HAMAP-Rule:MF_01661}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01661}.
CC   -!- SIMILARITY: Belongs to the RbsD / FucU family. RbsD subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01661}.
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DR   EMBL; FM177140; CAQ65448.1; -; Genomic_DNA.
DR   RefSeq; WP_003661509.1; NC_010999.1.
DR   AlphaFoldDB; B3W789; -.
DR   SMR; B3W789; -.
DR   KEGG; lcb:LCABL_03220; -.
DR   HOGENOM; CLU_135498_0_0_9; -.
DR   OMA; IIRTGEC; -.
DR   OrthoDB; 1750843at2; -.
DR   UniPathway; UPA00916; UER00888.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0062193; F:D-ribose pyranase activity; IEA:UniProtKB-EC.
DR   GO; GO:0016872; F:intramolecular lyase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0048029; F:monosaccharide binding; IEA:InterPro.
DR   GO; GO:0019303; P:D-ribose catabolic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.1650.10; -; 1.
DR   HAMAP; MF_01661; D_rib_pyranase; 1.
DR   InterPro; IPR023064; D-ribose_pyranase.
DR   InterPro; IPR023750; RbsD-like_sf.
DR   InterPro; IPR007721; RbsD_FucU.
DR   PANTHER; PTHR37831; PTHR37831; 1.
DR   Pfam; PF05025; RbsD_FucU; 1.
DR   SUPFAM; SSF102546; SSF102546; 1.
PE   3: Inferred from homology;
KW   Carbohydrate metabolism; Cytoplasm; Isomerase.
FT   CHAIN           1..130
FT                   /note="D-ribose pyranase"
FT                   /id="PRO_1000187152"
FT   ACT_SITE        20
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01661"
FT   BINDING         28
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01661"
FT   BINDING         97
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01661"
FT   BINDING         119..121
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01661"
SQ   SEQUENCE   130 AA;  14525 MW;  6A433FAC1E4256E1 CRC64;
     MKKGTVINTQ LSQVIADMGH FDLLGIGDAG MPVPEDTWKI DLAVSKNLPS FIDVLKNVLS
     ELQVQKVYLA EEIKTENPEQ LKQIQQLIDV PIAFIPHDQM KQDLSKTKAF VRTGEMTPYS
     NILLESGVVF