ID   RHMD_ECOL5              Reviewed;         405 AA.
AC   Q0TFJ5;
DT   14-OCT-2008, integrated into UniProtKB/Swiss-Prot.
DT   05-SEP-2006, sequence version 1.
DT   03-AUG-2022, entry version 100.
DE   RecName: Full=L-rhamnonate dehydratase {ECO:0000255|HAMAP-Rule:MF_01288};
DE            Short=RhamD {ECO:0000255|HAMAP-Rule:MF_01288};
DE            EC=4.2.1.90 {ECO:0000255|HAMAP-Rule:MF_01288};
GN   Name=rhmD {ECO:0000255|HAMAP-Rule:MF_01288}; OrderedLocusNames=ECP_2290;
OS   Escherichia coli O6:K15:H31 (strain 536 / UPEC).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=362663;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=536 / UPEC;
RX   PubMed=16879640; DOI=10.1111/j.1365-2958.2006.05255.x;
RA   Hochhut B., Wilde C., Balling G., Middendorf B., Dobrindt U.,
RA   Brzuszkiewicz E., Gottschalk G., Carniel E., Hacker J.;
RT   "Role of pathogenicity island-associated integrases in the genome
RT   plasticity of uropathogenic Escherichia coli strain 536.";
RL   Mol. Microbiol. 61:584-595(2006).
CC   -!- FUNCTION: Catalyzes the dehydration of L-rhamnonate to 2-keto-3-deoxy-
CC       L-rhamnonate (KDR). {ECO:0000255|HAMAP-Rule:MF_01288}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-rhamnonate = 2-dehydro-3-deoxy-L-rhamnonate + H2O;
CC         Xref=Rhea:RHEA:23080, ChEBI:CHEBI:15377, ChEBI:CHEBI:58118,
CC         ChEBI:CHEBI:58371; EC=4.2.1.90; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01288};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01288};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01288};
CC   -!- SUBUNIT: Homooctamer; tetramer of dimers. {ECO:0000255|HAMAP-
CC       Rule:MF_01288}.
CC   -!- MISCELLANEOUS: Reaction proceeds via a syn dehydration.
CC       {ECO:0000255|HAMAP-Rule:MF_01288}.
CC   -!- SIMILARITY: Belongs to the mandelate racemase/muconate lactonizing
CC       enzyme family. RhamD subfamily. {ECO:0000255|HAMAP-Rule:MF_01288}.
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DR   EMBL; CP000247; ABG70284.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q0TFJ5; -.
DR   SMR; Q0TFJ5; -.
DR   STRING; 362663.ECP_2290; -.
DR   EnsemblBacteria; ABG70284; ABG70284; ECP_2290.
DR   KEGG; ecp:ECP_2290; -.
DR   HOGENOM; CLU_030273_1_0_6; -.
DR   OMA; HFVISQP; -.
DR   Proteomes; UP000009182; Chromosome.
DR   GO; GO:0050032; F:L-rhamnonate dehydratase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0009063; P:cellular amino acid catabolic process; IEA:InterPro.
DR   CDD; cd03327; MR_like_2; 1.
DR   Gene3D; 3.20.20.120; -; 1.
DR   Gene3D; 3.30.390.10; -; 1.
DR   HAMAP; MF_01288; Rhamnon_dehydrat; 1.
DR   InterPro; IPR036849; Enolase-like_C_sf.
DR   InterPro; IPR029017; Enolase-like_N.
DR   InterPro; IPR029065; Enolase_C-like.
DR   InterPro; IPR023444; L-Rhamnon_dehydrat.
DR   InterPro; IPR018110; Mandel_Rmase/mucon_lact_enz_CS.
DR   InterPro; IPR013342; Mandelate_racemase_C.
DR   InterPro; IPR013341; Mandelate_racemase_N_dom.
DR   Pfam; PF13378; MR_MLE_C; 1.
DR   Pfam; PF02746; MR_MLE_N; 1.
DR   SFLD; SFLDF00006; rhamnonate_dehydratase; 1.
DR   SMART; SM00922; MR_MLE; 1.
DR   SUPFAM; SSF51604; SSF51604; 1.
DR   SUPFAM; SSF54826; SSF54826; 1.
DR   PROSITE; PS00908; MR_MLE_1; 1.
PE   3: Inferred from homology;
KW   Lyase; Magnesium; Metal-binding.
FT   CHAIN           1..405
FT                   /note="L-rhamnonate dehydratase"
FT                   /id="PRO_0000351698"
FT   ACT_SITE        329
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   BINDING         33
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   BINDING         59
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   BINDING         226
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   BINDING         252
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   BINDING         280
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   BINDING         349
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   SITE            302
FT                   /note="Increases basicity of active site His"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
FT   SITE            349
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01288"
SQ   SEQUENCE   405 AA;  44703 MW;  ED6DC134DB5284AC CRC64;
     MENIMTLPKI KQVRAWFTGG ATAEKGAGGG DYHDQGANHW IDDHIATPMS KYRDYEQSRQ
     SFGINVLGTL IVEVEAENGQ TGFAVSTAGE MGCFIVEKHL NRFIEGKCVS DIKLIHDQML
     NATLYYSGSG GLVMNTISCV DLALWDLFGK VVGLPVYKLL GGAVRDEIQF YATGARPDLA
     KEMGFIGGKM PTHWGPHDGD AGIRKDAAMV ADMREKCGED FWLMLDCWMS QDVNYAIKLA
     HACAPYNLKW IEECLPPQQY EGYRELKHNA PAGMMVTSGE HHGTLQSFRT LSENGIDIMQ
     PDVGWCGGLT TLVEIAAIAK SRGQLVVPHG SSVYSHHAVI TFTNTPFSEF LMTSPDCSTM
     RPQFDPILLN EPVPVNGRIH KSVLDKPGFG VELNRDCNLK RPYSH