KDUI_BACFN
ID KDUI_BACFN Reviewed; 280 AA.
AC Q5LJ16;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 21-JUN-2005, sequence version 1.
DT 03-AUG-2022, entry version 92.
DE RecName: Full=4-deoxy-L-threo-5-hexosulose-uronate ketol-isomerase {ECO:0000255|HAMAP-Rule:MF_00687};
DE EC=5.3.1.17 {ECO:0000255|HAMAP-Rule:MF_00687};
DE AltName: Full=5-keto-4-deoxyuronate isomerase {ECO:0000255|HAMAP-Rule:MF_00687};
DE AltName: Full=DKI isomerase {ECO:0000255|HAMAP-Rule:MF_00687};
GN Name=kduI {ECO:0000255|HAMAP-Rule:MF_00687}; OrderedLocusNames=BF0082;
OS Bacteroides fragilis (strain ATCC 25285 / DSM 2151 / CCUG 4856 / JCM 11019
OS / NCTC 9343 / Onslow).
OC Bacteria; Bacteroidetes; Bacteroidia; Bacteroidales; Bacteroidaceae;
OC Bacteroides.
OX NCBI_TaxID=272559;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 25285 / DSM 2151 / CCUG 4856 / JCM 11019 / NCTC 9343 / Onslow;
RX PubMed=15746427; DOI=10.1126/science.1107008;
RA Cerdeno-Tarraga A.-M., Patrick S., Crossman L.C., Blakely G., Abratt V.,
RA Lennard N., Poxton I., Duerden B., Harris B., Quail M.A., Barron A.,
RA Clark L., Corton C., Doggett J., Holden M.T.G., Larke N., Line A., Lord A.,
RA Norbertczak H., Ormond D., Price C., Rabbinowitsch E., Woodward J.,
RA Barrell B.G., Parkhill J.;
RT "Extensive DNA inversions in the B. fragilis genome control variable gene
RT expression.";
RL Science 307:1463-1465(2005).
CC -!- FUNCTION: Catalyzes the isomerization of 5-dehydro-4-deoxy-D-
CC glucuronate to 3-deoxy-D-glycero-2,5-hexodiulosonate.
CC {ECO:0000255|HAMAP-Rule:MF_00687}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=5-dehydro-4-deoxy-D-glucuronate = 3-deoxy-D-glycero-2,5-
CC hexodiulosonate; Xref=Rhea:RHEA:23896, ChEBI:CHEBI:17117,
CC ChEBI:CHEBI:29071; EC=5.3.1.17; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00687};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00687};
CC Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00687};
CC -!- PATHWAY: Glycan metabolism; pectin degradation; 2-dehydro-3-deoxy-D-
CC gluconate from pectin: step 4/5. {ECO:0000255|HAMAP-Rule:MF_00687}.
CC -!- SIMILARITY: Belongs to the KduI family. {ECO:0000255|HAMAP-
CC Rule:MF_00687}.
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DR EMBL; CR626927; CAH05860.1; -; Genomic_DNA.
DR RefSeq; WP_005797024.1; NC_003228.3.
DR AlphaFoldDB; Q5LJ16; -.
DR SMR; Q5LJ16; -.
DR STRING; 272559.BF9343_0081; -.
DR EnsemblBacteria; CAH05860; CAH05860; BF9343_0081.
DR GeneID; 66330788; -.
DR KEGG; bfs:BF9343_0081; -.
DR eggNOG; COG3717; Bacteria.
DR HOGENOM; CLU_062609_0_0_10; -.
DR OMA; VYSMYDR; -.
DR OrthoDB; 1047507at2; -.
DR UniPathway; UPA00545; UER00826.
DR Proteomes; UP000006731; Chromosome.
DR GO; GO:0008697; F:4-deoxy-L-threo-5-hexosulose-uronate ketol-isomerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0045490; P:pectin catabolic process; IEA:UniProtKB-UniRule.
DR Gene3D; 2.60.120.10; -; 1.
DR Gene3D; 2.60.120.520; -; 1.
DR HAMAP; MF_00687; KduI; 1.
DR InterPro; IPR007045; KduI.
DR InterPro; IPR021120; KduI/IolB_isomerase.
DR InterPro; IPR027449; KduI_N.
DR InterPro; IPR014710; RmlC-like_jellyroll.
DR InterPro; IPR011051; RmlC_Cupin_sf.
DR PANTHER; PTHR38461; PTHR38461; 1.
DR Pfam; PF04962; KduI; 1.
DR PIRSF; PIRSF006625; KduI; 1.
DR SUPFAM; SSF51182; SSF51182; 1.
PE 3: Inferred from homology;
KW Isomerase; Metal-binding; Reference proteome; Zinc.
FT CHAIN 1..280
FT /note="4-deoxy-L-threo-5-hexosulose-uronate ketol-
FT isomerase"
FT /id="PRO_1000045078"
FT BINDING 198
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00687"
FT BINDING 200
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00687"
FT BINDING 205
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00687"
FT BINDING 247
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00687"
SQ SEQUENCE 280 AA; 31765 MW; 1516FE7E15443F7C CRC64;
MKTNYEIRYA AHPEDARSYD TKRIRRDFLI EKVFSADEVN MVYSMYDRMV VGGAMPVKEV
LKLEAIDPLK APYFLTRREM GIFNVGGPGV VRAGDAIFQL DYKEALYLGA GDRDVTFEST
DAAHPAKFYF NSLAAHRNYP DKKVTKADAV VAEMGTLEGS NHRNINKMLV NQVLPTCQLQ
MGMTELAPGS VWNTMPAHVH SRRMEAYFYF EVPEEHAVCH FMGEVDETRH VWMKGDQAVL
SPEWSIHSAA ATHNYTFIWG MGGENLDYGD QDFSLITDLK
