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Database: UniProt
Entry: A0A180FHG4_9BACT
LinkDB: A0A180FHG4_9BACT
Original site: A0A180FHG4_9BACT 
ID   A0A180FHG4_9BACT        Unreviewed;       238 AA.
AC   A0A180FHG4;
DT   07-SEP-2016, integrated into UniProtKB/TrEMBL.
DT   07-SEP-2016, sequence version 1.
DT   24-JAN-2024, entry version 32.
DE   RecName: Full=4-hydroxy-tetrahydrodipicolinate reductase {ECO:0000256|ARBA:ARBA00038983, ECO:0000256|HAMAP-Rule:MF_00102};
DE            Short=HTPA reductase {ECO:0000256|HAMAP-Rule:MF_00102};
DE            EC=1.17.1.8 {ECO:0000256|ARBA:ARBA00038983, ECO:0000256|HAMAP-Rule:MF_00102};
GN   Name=dapB {ECO:0000256|HAMAP-Rule:MF_00102,
GN   ECO:0000313|EMBL:OAV71752.1};
GN   ORFNames=Barb4_00437 {ECO:0000313|EMBL:OAV71752.1};
OS   Bacteroidales bacterium Barb4.
OC   Bacteria; Bacteroidota; Bacteroidia; Bacteroidales.
OX   NCBI_TaxID=1633200 {ECO:0000313|EMBL:OAV71752.1, ECO:0000313|Proteomes:UP000078495};
RN   [1] {ECO:0000313|EMBL:OAV71752.1, ECO:0000313|Proteomes:UP000078495}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Barb4 {ECO:0000313|EMBL:OAV71752.1,
RC   ECO:0000313|Proteomes:UP000078495};
RA   Tai V., Carpenter K.J., Weber P.K., Nalepa C.A., Perlman S.J.,
RA   Keeling P.J.;
RT   "Genomic and NanoSIMS analyses of nitrogen-fixing bacterial ectosymbionts
RT   of a protist inhabiting a wood-eating cockroach.";
RL   Submitted (DEC-2015) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the conversion of 4-hydroxy-tetrahydrodipicolinate
CC       (HTPA) to tetrahydrodipicolinate. {ECO:0000256|HAMAP-Rule:MF_00102}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(S)-2,3,4,5-tetrahydrodipicolinate + H2O + NAD(+) = (2S,4S)-4-
CC         hydroxy-2,3,4,5-tetrahydrodipicolinate + H(+) + NADH;
CC         Xref=Rhea:RHEA:35323, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16845, ChEBI:CHEBI:57540, ChEBI:CHEBI:57945,
CC         ChEBI:CHEBI:67139; EC=1.17.1.8;
CC         Evidence={ECO:0000256|ARBA:ARBA00036290, ECO:0000256|HAMAP-
CC         Rule:MF_00102};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(S)-2,3,4,5-tetrahydrodipicolinate + H2O + NADP(+) = (2S,4S)-
CC         4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H(+) + NADPH;
CC         Xref=Rhea:RHEA:35331, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16845, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349,
CC         ChEBI:CHEBI:67139; EC=1.17.1.8;
CC         Evidence={ECO:0000256|ARBA:ARBA00036097, ECO:0000256|HAMAP-
CC         Rule:MF_00102};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-lysine biosynthesis via DAP
CC       pathway; (S)-tetrahydrodipicolinate from L-aspartate: step 4/4.
CC       {ECO:0000256|ARBA:ARBA00037922, ECO:0000256|HAMAP-Rule:MF_00102}.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_00102}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00102}.
CC   -!- SIMILARITY: Belongs to the DapB family. {ECO:0000256|ARBA:ARBA00006642,
CC       ECO:0000256|HAMAP-Rule:MF_00102}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_00102}.
CC   -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC       whole genome shotgun (WGS) entry which is preliminary data.
CC       {ECO:0000313|EMBL:OAV71752.1}.
CC   -!- CAUTION: Was originally thought to be a dihydrodipicolinate reductase
CC       (DHDPR), catalyzing the conversion of dihydrodipicolinate to
CC       tetrahydrodipicolinate. However, it was shown in E.coli that the
CC       substrate of the enzymatic reaction is not dihydrodipicolinate (DHDP)
CC       but in fact (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinic acid
CC       (HTPA), the product released by the DapA-catalyzed reaction.
CC       {ECO:0000256|HAMAP-Rule:MF_00102}.
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DR   EMBL; LBCX01000011; OAV71752.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A180FHG4; -.
DR   PATRIC; fig|1633200.3.peg.266; -.
DR   UniPathway; UPA00034; UER00018.
DR   Proteomes; UP000078495; Unassembled WGS sequence.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0008839; F:4-hydroxy-tetrahydrodipicolinate reductase; IEA:UniProtKB-EC.
DR   GO; GO:0051287; F:NAD binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0050661; F:NADP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0016726; F:oxidoreductase activity, acting on CH or CH2 groups, NAD or NADP as acceptor; IEA:UniProtKB-UniRule.
DR   GO; GO:0019877; P:diaminopimelate biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0009089; P:lysine biosynthetic process via diaminopimelate; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.720; NAD(P)-binding Rossmann-like Domain; 1.
DR   HAMAP; MF_00102; DapB; 1.
DR   InterPro; IPR022663; DapB_C.
DR   InterPro; IPR000846; DapB_N.
DR   InterPro; IPR023940; DHDPR_bac.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   NCBIfam; TIGR00036; dapB; 1.
DR   PANTHER; PTHR20836:SF0; 4-HYDROXY-TETRAHYDRODIPICOLINATE REDUCTASE 1, CHLOROPLASTIC-RELATED; 1.
DR   PANTHER; PTHR20836; DIHYDRODIPICOLINATE REDUCTASE; 1.
DR   Pfam; PF05173; DapB_C; 1.
DR   Pfam; PF01113; DapB_N; 1.
DR   PIRSF; PIRSF000161; DHPR; 1.
DR   SUPFAM; SSF55347; Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain; 1.
DR   SUPFAM; SSF51735; NAD(P)-binding Rossmann-fold domains; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW   Rule:MF_00102}; Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00102};
KW   Diaminopimelate biosynthesis {ECO:0000256|ARBA:ARBA00022915,
KW   ECO:0000256|HAMAP-Rule:MF_00102};
KW   Lysine biosynthesis {ECO:0000256|ARBA:ARBA00023154, ECO:0000256|HAMAP-
KW   Rule:MF_00102};
KW   NAD {ECO:0000256|ARBA:ARBA00023027, ECO:0000256|HAMAP-Rule:MF_00102};
KW   NADP {ECO:0000256|HAMAP-Rule:MF_00102};
KW   Oxidoreductase {ECO:0000256|HAMAP-Rule:MF_00102,
KW   ECO:0000313|EMBL:OAV71752.1};
KW   Reference proteome {ECO:0000313|Proteomes:UP000078495}.
FT   DOMAIN          1..103
FT                   /note="Dihydrodipicolinate reductase N-terminal"
FT                   /evidence="ECO:0000259|Pfam:PF01113"
FT   DOMAIN          106..235
FT                   /note="Dihydrodipicolinate reductase C-terminal"
FT                   /evidence="ECO:0000259|Pfam:PF05173"
FT   ACT_SITE        135
FT                   /note="Proton donor/acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
FT   ACT_SITE        139
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
FT   BINDING         31
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
FT   BINDING         75..77
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
FT   BINDING         100..103
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
FT   BINDING         136
FT                   /ligand="(S)-2,3,4,5-tetrahydrodipicolinate"
FT                   /ligand_id="ChEBI:CHEBI:16845"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
FT   BINDING         145..146
FT                   /ligand="(S)-2,3,4,5-tetrahydrodipicolinate"
FT                   /ligand_id="ChEBI:CHEBI:16845"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00102"
SQ   SEQUENCE   238 AA;  26293 MW;  00A404D0BB651F7A CRC64;
     MKIALVGYGK MGKTIGRIAQ ERGHEIVSVI DADNLEDFGL AAFKSADVAI EFTVPDTAFE
     NYRKCFEAGV PVVSGTTGWT ARLAEVREIC ERDGKTFFYT SNFSIGVNVF FALNKYLAKI
     MNGFPSYDVR MTETHHIHKL DAPSGTAISL AEDLTRTLDR KDRWVKEIAE RVGDVAIHAI
     REGEVPGIHE IIYESEVDTI SIKHDAKSRE GFALGAVVAA EFTAGKKGFL TMSDLFTF
//
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