ID   ECTB_OCEIH              Reviewed;         426 AA.
AC   Q8ESU8;
DT   01-FEB-2005, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2003, sequence version 1.
DT   25-MAY-2022, entry version 111.
DE   RecName: Full=Diaminobutyrate--2-oxoglutarate transaminase;
DE            EC=2.6.1.76;
DE   AltName: Full=DABA aminotransferase;
DE   AltName: Full=Diaminobutyrate--2-oxoglutarate aminotransferase;
DE   AltName: Full=L-2,4-diaminobutyric acid transaminase;
GN   Name=ectB; OrderedLocusNames=OB0518;
OS   Oceanobacillus iheyensis (strain DSM 14371 / CIP 107618 / JCM 11309 / KCTC
OS   3954 / HTE831).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Oceanobacillus.
OX   NCBI_TaxID=221109;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 14371 / CIP 107618 / JCM 11309 / KCTC 3954 / HTE831;
RX   PubMed=12235376; DOI=10.1093/nar/gkf526;
RA   Takami H., Takaki Y., Uchiyama I.;
RT   "Genome sequence of Oceanobacillus iheyensis isolated from the Iheya Ridge
RT   and its unexpected adaptive capabilities to extreme environments.";
RL   Nucleic Acids Res. 30:3927-3935(2002).
CC   -!- FUNCTION: Catalyzes reversively the conversion of L-aspartate beta-
CC       semialdehyde (ASA) to L-2,4-diaminobutyrate (DABA) by transamination
CC       with L-glutamate. {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2-oxoglutarate + L-2,4-diaminobutanoate = L-aspartate 4-
CC         semialdehyde + L-glutamate; Xref=Rhea:RHEA:11160, ChEBI:CHEBI:16810,
CC         ChEBI:CHEBI:29985, ChEBI:CHEBI:58761, ChEBI:CHEBI:537519;
CC         EC=2.6.1.76;
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000250};
CC   -!- PATHWAY: Amine and polyamine biosynthesis; ectoine biosynthesis; L-
CC       ectoine from L-aspartate 4-semialdehyde: step 1/3.
CC   -!- SIMILARITY: Belongs to the class-III pyridoxal-phosphate-dependent
CC       aminotransferase family. {ECO:0000305}.
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DR   EMBL; BA000028; BAC12474.1; -; Genomic_DNA.
DR   RefSeq; WP_011064921.1; NC_004193.1.
DR   AlphaFoldDB; Q8ESU8; -.
DR   SMR; Q8ESU8; -.
DR   STRING; 221109.22776197; -.
DR   EnsemblBacteria; BAC12474; BAC12474; BAC12474.
DR   KEGG; oih:OB0518; -.
DR   eggNOG; COG0160; Bacteria.
DR   HOGENOM; CLU_016922_10_0_9; -.
DR   OMA; ELDQWKP; -.
DR   OrthoDB; 386839at2; -.
DR   PhylomeDB; Q8ESU8; -.
DR   UniPathway; UPA00067; UER00121.
DR   Proteomes; UP000000822; Chromosome.
DR   GO; GO:0045303; F:diaminobutyrate-2-oxoglutarate transaminase activity; IEA:UniProtKB-EC.
DR   GO; GO:0047307; F:diaminobutyrate-pyruvate transaminase activity; IEA:InterPro.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:InterPro.
DR   GO; GO:0019491; P:ectoine biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd00610; OAT_like; 1.
DR   Gene3D; 3.40.640.10; -; 1.
DR   Gene3D; 3.90.1150.10; -; 1.
DR   InterPro; IPR005814; Aminotrans_3.
DR   InterPro; IPR004637; Dat.
DR   InterPro; IPR012773; Ectoine_EctB.
DR   InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR   InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR   InterPro; IPR015422; PyrdxlP-dep_Trfase_small.
DR   PANTHER; PTHR43552; PTHR43552; 1.
DR   PANTHER; PTHR43552:SF2; PTHR43552:SF2; 1.
DR   Pfam; PF00202; Aminotran_3; 1.
DR   PIRSF; PIRSF000521; Transaminase_4ab_Lys_Orn; 1.
DR   SUPFAM; SSF53383; SSF53383; 1.
DR   TIGRFAMs; TIGR00709; dat; 1.
DR   TIGRFAMs; TIGR02407; ectoine_ectB; 1.
DR   PROSITE; PS00600; AA_TRANSFER_CLASS_3; 1.
PE   3: Inferred from homology;
KW   Aminotransferase; Pyridoxal phosphate; Reference proteome; Transferase.
FT   CHAIN           1..426
FT                   /note="Diaminobutyrate--2-oxoglutarate transaminase"
FT                   /id="PRO_0000120526"
FT   MOD_RES         274
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   426 AA;  46943 MW;  B966DCD55EB776DC CRC64;
     MTTIVDKARN DMAVFEEMES AVRSYSRGWP VVFEKAKGYK LWDKNGNEYI DFFAGAGALN
     YGHNPSEMQK VMIDYIQNDG VIHSLDMATA PRKKFLESFN EIILKPRNMD YKVMFPGPTG
     TNTVESALKI ARKVTGRDTV IGFTNAFHGM TIGSLSVTGN SFKRNGAGIP LNHAISMPFD
     QYVDEQDSIA YIERFLEDSG SGVALPAAFI LETVQGEGGI NAARLEWVKK IEEICRKWDI
     LLIIDDVQAG CGRTGTFFSF EEAGINPDIV CLSKSIGGVG LPMAITLIKP EFDQWGPGEH
     NGTFRGNNLA FLAATEALNN WKTDAFSQNI KKMSSLFQER MKRIVEKFPE LNADLRGRGL
     MLGIGVHVDG LAGEICAEAF SRGLILETSG AKDEVVKFLP PLIIDEDGIE KGMDILEESI
     QAALEK