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FOLD_POLNS
ID   FOLD_POLNS              Reviewed;         284 AA.
AC   B1XUA6;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   20-MAY-2008, sequence version 1.
DT   03-AUG-2022, entry version 78.
DE   RecName: Full=Bifunctional protein FolD {ECO:0000255|HAMAP-Rule:MF_01576};
DE   Includes:
DE     RecName: Full=Methylenetetrahydrofolate dehydrogenase {ECO:0000255|HAMAP-Rule:MF_01576};
DE              EC=1.5.1.5 {ECO:0000255|HAMAP-Rule:MF_01576};
DE   Includes:
DE     RecName: Full=Methenyltetrahydrofolate cyclohydrolase {ECO:0000255|HAMAP-Rule:MF_01576};
DE              EC=3.5.4.9 {ECO:0000255|HAMAP-Rule:MF_01576};
GN   Name=folD {ECO:0000255|HAMAP-Rule:MF_01576}; OrderedLocusNames=Pnec_0703;
OS   Polynucleobacter necessarius subsp. necessarius (strain STIR1).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC   Burkholderiaceae; Polynucleobacter.
OX   NCBI_TaxID=452638;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=STIR1;
RX   PubMed=24167248; DOI=10.1073/pnas.1316687110;
RA   Boscaro V., Felletti M., Vannini C., Ackerman M.S., Chain P.S.,
RA   Malfatti S., Vergez L.M., Shin M., Doak T.G., Lynch M., Petroni G.;
RT   "Polynucleobacter necessarius, a model for genome reduction in both free-
RT   living and symbiotic bacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 110:18590-18595(2013).
CC   -!- FUNCTION: Catalyzes the oxidation of 5,10-methylenetetrahydrofolate to
CC       5,10-methenyltetrahydrofolate and then the hydrolysis of 5,10-
CC       methenyltetrahydrofolate to 10-formyltetrahydrofolate.
CC       {ECO:0000255|HAMAP-Rule:MF_01576}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + NADP(+) = 5,10-
CC         methenyltetrahydrofolate + NADPH; Xref=Rhea:RHEA:22812,
CC         ChEBI:CHEBI:15636, ChEBI:CHEBI:57455, ChEBI:CHEBI:57783,
CC         ChEBI:CHEBI:58349; EC=1.5.1.5; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01576};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5,10-methenyltetrahydrofolate + H2O = (6S)-10-
CC         formyltetrahydrofolate + H(+); Xref=Rhea:RHEA:23700,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:57454,
CC         ChEBI:CHEBI:57455; EC=3.5.4.9; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01576};
CC   -!- PATHWAY: One-carbon metabolism; tetrahydrofolate interconversion.
CC       {ECO:0000255|HAMAP-Rule:MF_01576}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01576}.
CC   -!- SIMILARITY: Belongs to the tetrahydrofolate
CC       dehydrogenase/cyclohydrolase family. {ECO:0000255|HAMAP-Rule:MF_01576}.
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DR   EMBL; CP001010; ACB43933.1; -; Genomic_DNA.
DR   RefSeq; WP_012357700.1; NC_010531.1.
DR   AlphaFoldDB; B1XUA6; -.
DR   SMR; B1XUA6; -.
DR   STRING; 452638.Pnec_0703; -.
DR   EnsemblBacteria; ACB43933; ACB43933; Pnec_0703.
DR   KEGG; pne:Pnec_0703; -.
DR   eggNOG; COG0190; Bacteria.
DR   HOGENOM; CLU_034045_2_1_4; -.
DR   OMA; HIVGRPM; -.
DR   OrthoDB; 1449514at2; -.
DR   UniPathway; UPA00193; -.
DR   GO; GO:0004477; F:methenyltetrahydrofolate cyclohydrolase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0004488; F:methylenetetrahydrofolate dehydrogenase (NADP+) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000105; P:histidine biosynthetic process; IEA:UniProtKB-KW.
DR   GO; GO:0009086; P:methionine biosynthetic process; IEA:UniProtKB-KW.
DR   GO; GO:0006164; P:purine nucleotide biosynthetic process; IEA:UniProtKB-KW.
DR   GO; GO:0035999; P:tetrahydrofolate interconversion; IEA:UniProtKB-UniPathway.
DR   CDD; cd01080; NAD_bind_m-THF_DH_Cyclohyd; 1.
DR   HAMAP; MF_01576; THF_DHG_CYH; 1.
DR   InterPro; IPR046346; Aminiacid_DH-like_N_sf.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   InterPro; IPR000672; THF_DH/CycHdrlase.
DR   InterPro; IPR020630; THF_DH/CycHdrlase_cat_dom.
DR   InterPro; IPR020867; THF_DH/CycHdrlase_CS.
DR   InterPro; IPR020631; THF_DH/CycHdrlase_NAD-bd_dom.
DR   Pfam; PF00763; THF_DHG_CYH; 1.
DR   Pfam; PF02882; THF_DHG_CYH_C; 1.
DR   PRINTS; PR00085; THFDHDRGNASE.
DR   SUPFAM; SSF51735; SSF51735; 1.
DR   SUPFAM; SSF53223; SSF53223; 1.
DR   PROSITE; PS00766; THF_DHG_CYH_1; 1.
DR   PROSITE; PS00767; THF_DHG_CYH_2; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Histidine biosynthesis; Hydrolase;
KW   Methionine biosynthesis; Multifunctional enzyme; NADP;
KW   One-carbon metabolism; Oxidoreductase; Purine biosynthesis.
FT   CHAIN           1..284
FT                   /note="Bifunctional protein FolD"
FT                   /id="PRO_1000147507"
FT   BINDING         165..167
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01576"
FT   BINDING         190
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01576"
FT   BINDING         231
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01576"
SQ   SEQUENCE   284 AA;  30034 MW;  CBA70A7BB2DE0236 CRC64;
     MPAQLLDGNA LSKKLRTEIA ARSAIVTAKG TRPGLAVIVV GDNPASQVYV RNKVKACEDV
     GFHSVLERYT AELGEEELLA RIATLNADPA IHGILVQLPL PEHIASERVL EAIAPEKDVD
     GFHVANAGAL MVGQSEFKPC TPYGCMKILE SIEYPIRSAR AVIVGASNIV GKPMAMLLLQ
     AGATVTICNS KTRDLAHHTK DADILVVATG KPKMISGDMV KNGAVVIDVG INRLPDGKLC
     GDVDFDTAKY VAGWITPVPG GVGPMTITML LMNTLEAAEK AAKH
 
 
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