ID   FOLD2_SACEN             Reviewed;         283 AA.
AC   A4FP42;
DT   02-OCT-2007, integrated into UniProtKB/Swiss-Prot.
DT   17-APR-2007, sequence version 1.
DT   02-SEP-2026, entry version 106.
DE   RecName: Full=Bifunctional protein FolD 2 {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=folD2 {ECO:0000255|HAMAP-Rule:MF_01576};
GN   OrderedLocusNames=SACE_6651;
OS   Saccharopolyspora erythraea (strain ATCC 11635 / DSM 40517 / JCM 4748 /
OS   NBRC 13426 / NCIMB 8594 / NRRL 2338).
OC   Bacteria; Bacillati; Actinomycetota; Actinomycetes; Pseudonocardiales;
OC   Pseudonocardiaceae; Saccharopolyspora.
OX   NCBI_TaxID=405948;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 11635 / DSM 40517 / JCM 4748 / NBRC 13426 / NCIMB 8594 /
RC   NRRL 2338;
RX   PubMed=17369815; DOI=10.1038/nbt1297;
RA   Oliynyk M., Samborskyy M., Lester J.B., Mironenko T., Scott N., Dickens S.,
RA   Haydock S.F., Leadlay P.F.;
RT   "Complete genome sequence of the erythromycin-producing bacterium
RT   Saccharopolyspora erythraea NRRL23338.";
RL   Nat. Biotechnol. 25:447-453(2007).
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(+) = (6R)-
CC         5,10-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=(6R)-5,10-methenyltetrahydrofolate + H2O = (6R)-10-
CC         formyltetrahydrofolate + H(+); Xref=Rhea:RHEA:23700,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:57455,
CC         ChEBI:CHEBI:195366; 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; AM420293; CAM05817.1; -; Genomic_DNA.
DR   RefSeq; WP_009949963.1; NC_009142.1.
DR   AlphaFoldDB; A4FP42; -.
DR   SMR; A4FP42; -.
DR   STRING; 405948.SACE_6651; -.
DR   GeneID; 306463041; -.
DR   KEGG; sen:SACE_6651; -.
DR   eggNOG; COG0190; Bacteria.
DR   HOGENOM; CLU_034045_3_0_11; -.
DR   OrthoDB; 9803580at2; -.
DR   UniPathway; UPA00193; -.
DR   Proteomes; UP000006728; Chromosome.
DR   GO; GO:0005829; C:cytosol; IEA:TreeGrafter.
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:0035999; P:tetrahydrofolate interconversion; IEA:UniProtKB-UniRule.
DR   CDD; cd01080; NAD_bind_m-THF_DH_Cyclohyd; 1.
DR   FunFam; 3.40.50.720:FF:000094; Bifunctional protein FolD; 1.
DR   FunFam; 3.40.50.10860:FF:000005; C-1-tetrahydrofolate synthase, cytoplasmic, putative; 1.
DR   Gene3D; 3.40.50.10860; Leucine Dehydrogenase, chain A, domain 1; 1.
DR   Gene3D; 3.40.50.720; NAD(P)-binding Rossmann-like Domain; 1.
DR   HAMAP; MF_01576; THF_DHG_CYH; 1.
DR   InterPro; IPR046346; Aminoacid_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; IPR020631; THF_DH/CycHdrlase_NAD-bd_dom.
DR   NCBIfam; NF010789; PRK14193.1; 1.
DR   PANTHER; PTHR48099:SF5; C-1-TETRAHYDROFOLATE SYNTHASE, CYTOPLASMIC; 1.
DR   PANTHER; PTHR48099; C-1-TETRAHYDROFOLATE SYNTHASE, CYTOPLASMIC-RELATED; 1.
DR   Pfam; PF00763; THF_DHG_CYH; 1.
DR   Pfam; PF02882; THF_DHG_CYH_C; 1.
DR   PRINTS; PR00085; THFDHDRGNASE.
DR   SUPFAM; SSF53223; Aminoacid dehydrogenase-like, N-terminal domain; 1.
DR   SUPFAM; SSF51735; NAD(P)-binding Rossmann-fold domains; 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;
KW   Reference proteome.
FT   CHAIN           1..283
FT                   /note="Bifunctional protein FolD 2"
FT                   /id="PRO_0000305875"
FT   BINDING         165..167
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01576"
FT   BINDING         192
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01576"
FT   BINDING         233
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01576"
SQ   SEQUENCE   283 AA;  29707 MW;  5518DD7CEE0F7336 CRC64;
     MSATILDGKA TKNTIFEELR PRVARLAEQG RTPGLATVLV GDDPASHSYV RAKHNDCAKV
     GINSIRKELP ADASQSDVEA VVDELNADPA CHGYIIQLPL PEQLDAGPLL ERIAPEKDAD
     GLHPISLGRL VLGEQAPLPC TPRGIIELLR RYDVPLAGAR VAVVGRGITV GRPIGLLLTR
     RSENATVTLC HTGTKDLAEE VRRADIVVAA AGRPHLITAD MVRPGAAVLD VGVTRTDSGL
     AGDVHPDVAE VAGFLSPNPG GIGPMTRAML LSNVVEAAER AAS
//