ID   ECTC_DESAL              Reviewed;         130 AA.
AC   B8F9C9;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   03-MAR-2009, sequence version 1.
DT   25-MAY-2022, entry version 60.
DE   RecName: Full=L-ectoine synthase {ECO:0000255|HAMAP-Rule:MF_01255};
DE            EC=4.2.1.108 {ECO:0000255|HAMAP-Rule:MF_01255};
DE   AltName: Full=N-acetyldiaminobutyrate dehydratase {ECO:0000255|HAMAP-Rule:MF_01255};
GN   Name=ectC {ECO:0000255|HAMAP-Rule:MF_01255}; OrderedLocusNames=Dalk_1172;
OS   Desulfatibacillum aliphaticivorans.
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Desulfobacterales;
OC   Desulfobacteraceae; Desulfatibacillum.
OX   NCBI_TaxID=218208;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=AK-01;
RX   PubMed=21651686; DOI=10.1111/j.1462-2920.2011.02516.x;
RA   Callaghan A.V., Morris B.E., Pereira I.A., McInerney M.J., Austin R.N.,
RA   Groves J.T., Kukor J.J., Suflita J.M., Young L.Y., Zylstra G.J., Wawrik B.;
RT   "The genome sequence of Desulfatibacillum alkenivorans AK-01: a blueprint
RT   for anaerobic alkane oxidation.";
RL   Environ. Microbiol. 14:101-113(2012).
CC   -!- FUNCTION: Catalyzes the circularization of gamma-N-acetyl-alpha,gamma-
CC       diaminobutyric acid (ADABA) to ectoine (1,4,5,6-tetrahydro-2-methyl-4-
CC       pyrimidine carboxylic acid), which is an excellent osmoprotectant.
CC       {ECO:0000255|HAMAP-Rule:MF_01255}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(2S)-4-acetamido-2-aminobutanoate = H2O + L-ectoine;
CC         Xref=Rhea:RHEA:17281, ChEBI:CHEBI:15377, ChEBI:CHEBI:58515,
CC         ChEBI:CHEBI:58929; EC=4.2.1.108; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01255};
CC   -!- PATHWAY: Amine and polyamine biosynthesis; ectoine biosynthesis; L-
CC       ectoine from L-aspartate 4-semialdehyde: step 3/3. {ECO:0000255|HAMAP-
CC       Rule:MF_01255}.
CC   -!- SIMILARITY: Belongs to the ectoine synthase family. {ECO:0000255|HAMAP-
CC       Rule:MF_01255}.
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DR   EMBL; CP001322; ACL02875.1; -; Genomic_DNA.
DR   RefSeq; WP_012610312.1; NC_011768.1.
DR   AlphaFoldDB; B8F9C9; -.
DR   SMR; B8F9C9; -.
DR   EnsemblBacteria; ACL02875; ACL02875; Dalk_1172.
DR   KEGG; dal:Dalk_1172; -.
DR   eggNOG; COG1917; Bacteria.
DR   HOGENOM; CLU_154525_0_0_7; -.
DR   OMA; CVFNPPI; -.
DR   OrthoDB; 1928636at2; -.
DR   UniPathway; UPA00067; UER00123.
DR   Proteomes; UP000000739; Chromosome.
DR   GO; GO:0033990; F:ectoine synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0019491; P:ectoine biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd06978; cupin_EctC; 1.
DR   Gene3D; 2.60.120.10; -; 1.
DR   HAMAP; MF_01255; Ectoine_synth; 1.
DR   InterPro; IPR010462; Ectoine_synth.
DR   InterPro; IPR014710; RmlC-like_jellyroll.
DR   InterPro; IPR011051; RmlC_Cupin_sf.
DR   PANTHER; PTHR39289; PTHR39289; 1.
DR   Pfam; PF06339; Ectoine_synth; 1.
DR   SUPFAM; SSF51182; SSF51182; 1.
PE   3: Inferred from homology;
KW   Lyase; Reference proteome.
FT   CHAIN           1..130
FT                   /note="L-ectoine synthase"
FT                   /id="PRO_1000139968"
SQ   SEQUENCE   130 AA;  14667 MW;  384E43BC9C70A1C2 CRC64;
     MLVRQLDDIL GTDADVKGET GTWASRRLLL KKDGMGFSLH DTIIYPGTET HLWYKNHLEA
     VYCIHGKGEI ELVPSGELIP IRPGTMYALD KHDEHLLRAS EELRLVCVFN PPLTGREDHD
     EDGAYPVLDD