ID   ECTC_RHOJR              Reviewed;         132 AA.
AC   Q0SH55;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   05-SEP-2006, sequence version 1.
DT   25-MAY-2022, entry version 100.
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};
GN   OrderedLocusNames=RHA1_ro01307;
OS   Rhodococcus jostii (strain RHA1).
OC   Bacteria; Actinobacteria; Corynebacteriales; Nocardiaceae; Rhodococcus.
OX   NCBI_TaxID=101510;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RHA1;
RX   PubMed=17030794; DOI=10.1073/pnas.0607048103;
RA   McLeod M.P., Warren R.L., Hsiao W.W.L., Araki N., Myhre M., Fernandes C.,
RA   Miyazawa D., Wong W., Lillquist A.L., Wang D., Dosanjh M., Hara H.,
RA   Petrescu A., Morin R.D., Yang G., Stott J.M., Schein J.E., Shin H.,
RA   Smailus D., Siddiqui A.S., Marra M.A., Jones S.J.M., Holt R.,
RA   Brinkman F.S.L., Miyauchi K., Fukuda M., Davies J.E., Mohn W.W.,
RA   Eltis L.D.;
RT   "The complete genome of Rhodococcus sp. RHA1 provides insights into a
RT   catabolic powerhouse.";
RL   Proc. Natl. Acad. Sci. U.S.A. 103:15582-15587(2006).
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; CP000431; ABG93131.1; -; Genomic_DNA.
DR   RefSeq; WP_009474015.1; NC_008268.1.
DR   AlphaFoldDB; Q0SH55; -.
DR   SMR; Q0SH55; -.
DR   STRING; 101510.RHA1_ro01307; -.
DR   DNASU; 4219161; -.
DR   EnsemblBacteria; ABG93131; ABG93131; RHA1_ro01307.
DR   KEGG; rha:RHA1_ro01307; -.
DR   eggNOG; COG1917; Bacteria.
DR   HOGENOM; CLU_154525_0_0_11; -.
DR   OMA; CVFNPPI; -.
DR   UniPathway; UPA00067; UER00123.
DR   Proteomes; UP000008710; 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..132
FT                   /note="L-ectoine synthase"
FT                   /id="PRO_1000067236"
SQ   SEQUENCE   132 AA;  14883 MW;  8E0DCFF2718AB5C0 CRC64;
     MIVRTTAEIT DTDRDITSED GNWRSKRIIL GGDKVGFSFH ETTIKAGSVN EFHYANHVEA
     VWLVEGTGKL IDLDNDKVYE LGPGSMYLLN GHERHRVEPE TEMRMLCVFN PPVTGREVHD
     ENGVYPLVEV PA