ID   TRUB_LACCB              Reviewed;         306 AA.
AC   B3WER2;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 1.
DT   25-MAY-2022, entry version 73.
DE   RecName: Full=tRNA pseudouridine synthase B {ECO:0000255|HAMAP-Rule:MF_01080};
DE            EC=5.4.99.25 {ECO:0000255|HAMAP-Rule:MF_01080};
DE   AltName: Full=tRNA pseudouridine(55) synthase {ECO:0000255|HAMAP-Rule:MF_01080};
DE            Short=Psi55 synthase {ECO:0000255|HAMAP-Rule:MF_01080};
DE   AltName: Full=tRNA pseudouridylate synthase {ECO:0000255|HAMAP-Rule:MF_01080};
DE   AltName: Full=tRNA-uridine isomerase {ECO:0000255|HAMAP-Rule:MF_01080};
GN   Name=truB {ECO:0000255|HAMAP-Rule:MF_01080}; OrderedLocusNames=LCABL_17830;
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: Responsible for synthesis of pseudouridine from uracil-55 in
CC       the psi GC loop of transfer RNAs. {ECO:0000255|HAMAP-Rule:MF_01080}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=uridine(55) in tRNA = pseudouridine(55) in tRNA;
CC         Xref=Rhea:RHEA:42532, Rhea:RHEA-COMP:10101, Rhea:RHEA-COMP:10102,
CC         ChEBI:CHEBI:65314, ChEBI:CHEBI:65315; EC=5.4.99.25;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01080};
CC   -!- SIMILARITY: Belongs to the pseudouridine synthase TruB family. Type 1
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_01080}.
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DR   EMBL; FM177140; CAQ66863.1; -; Genomic_DNA.
DR   AlphaFoldDB; B3WER2; -.
DR   SMR; B3WER2; -.
DR   KEGG; lcb:LCABL_17830; -.
DR   HOGENOM; CLU_032087_0_1_9; -.
DR   OMA; ELQFIRW; -.
DR   GO; GO:0003723; F:RNA binding; IEA:InterPro.
DR   GO; GO:0106029; F:tRNA pseudouridine synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0031119; P:tRNA pseudouridine synthesis; IEA:UniProtKB-UniRule.
DR   CDD; cd02573; PseudoU_synth_EcTruB; 1.
DR   HAMAP; MF_01080; TruB_bact; 1.
DR   InterPro; IPR020103; PsdUridine_synth_cat_dom_sf.
DR   InterPro; IPR002501; PsdUridine_synth_N.
DR   InterPro; IPR014780; tRNA_psdUridine_synth_TruB.
DR   InterPro; IPR032819; TruB_C.
DR   PANTHER; PTHR13767; PTHR13767; 1.
DR   Pfam; PF16198; TruB_C_2; 1.
DR   Pfam; PF01509; TruB_N; 1.
DR   SUPFAM; SSF55120; SSF55120; 1.
DR   TIGRFAMs; TIGR00431; TruB; 1.
PE   3: Inferred from homology;
KW   Isomerase; tRNA processing.
FT   CHAIN           1..306
FT                   /note="tRNA pseudouridine synthase B"
FT                   /id="PRO_1000149824"
FT   ACT_SITE        43
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01080"
SQ   SEQUENCE   306 AA;  33235 MW;  E8D0598BE7D72DB3 CRC64;
     MKGTAMNGIL PLYKPTGMTS ADAVYHARKI LGIKKIGHSG TLDPNVDGVL PLAIGAGTKA
     VPQLMASGKV YTGEITLGFA TTTEDLDGEV VDKTPLTQPF TADQLDAALT AWTGNITQIP
     PMFSAVKVNG RRLYEYARAG ETVKRPERQA TVSQFTRTDE PVFSATDGTQ RFRFEVHVSK
     GTYIRTLAVD VGKTLGVAAV MSQLTRVKSG GFTLKQAVSI EQLKAHAAAG TLADVIQPID
     IAFADLPQVD LTVEQFEAIS HGRFLSLDQQ TPRVRLHFAG VLKAIYRRED DQYRPDLMFL
     ANEKNV