ID   DLHH_SYNY3              Reviewed;         246 AA.
AC   P73163;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   25-MAY-2022, entry version 107.
DE   RecName: Full=Putative carboxymethylenebutenolidase;
DE            EC=3.1.1.45;
DE   AltName: Full=Dienelactone hydrolase;
DE            Short=DLH;
GN   OrderedLocusNames=sll1298;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2-(5-oxo-2,5-dihydrofuran-2-ylidene)acetate + H2O = 4-oxohex-
CC         2-enedioate + H(+); Xref=Rhea:RHEA:12372, ChEBI:CHEBI:12040,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:57263; EC=3.1.1.45;
CC   -!- SIMILARITY: Belongs to the dienelactone hydrolase family.
CC       {ECO:0000305}.
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DR   EMBL; BA000022; BAA17189.1; -; Genomic_DNA.
DR   PIR; S75275; S75275.
DR   AlphaFoldDB; P73163; -.
DR   SMR; P73163; -.
DR   STRING; 1148.1652266; -.
DR   ESTHER; syny3-dlhh; Dienelactone_hydrolase.
DR   PaxDb; P73163; -.
DR   EnsemblBacteria; BAA17189; BAA17189; BAA17189.
DR   KEGG; syn:sll1298; -.
DR   eggNOG; COG0412; Bacteria.
DR   InParanoid; P73163; -.
DR   OMA; HIKAYVV; -.
DR   PhylomeDB; P73163; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0008806; F:carboxymethylenebutenolidase activity; IEA:UniProtKB-EC.
DR   Gene3D; 3.40.50.1820; -; 1.
DR   InterPro; IPR029058; AB_hydrolase.
DR   InterPro; IPR002925; Dienelactn_hydro.
DR   Pfam; PF01738; DLH; 1.
DR   SUPFAM; SSF53474; SSF53474; 1.
PE   3: Inferred from homology;
KW   Hydrolase; Reference proteome.
FT   CHAIN           1..246
FT                   /note="Putative carboxymethylenebutenolidase"
FT                   /id="PRO_0000161582"
FT   ACT_SITE        127
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        183
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        215
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   246 AA;  26942 MW;  D31317D19317BD1F CRC64;
     MTVDIKTTLV TIPNQNLQIA GYLAEPVAVG QYPVVIVIQE IFGVNSHIRD VTERVAKEGY
     VAIAPAIYQR QAPGFEEGYT PEGIEAGRKL KDQTSSAEIL SDLEATIAYA QTLPNVKPEE
     VGLIGFCFGG WIVYLGASLP TVKATASFYG AGIPHWAPGT AEPPITYTDK IQGTLYAFFG
     LEDTSIPMAD TEQIEQALTK YQVNHKIFRY PGADHGFFCD QRASYNAEAA ADAWQKVKQL
     FQTELK