ID   FOLD_STRU0              Reviewed;         284 AA.
AC   B9DUU0;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   24-MAR-2009, sequence version 1.
DT   03-AUG-2022, entry version 75.
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=SUB1277;
OS   Streptococcus uberis (strain ATCC BAA-854 / 0140J).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=218495;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-854 / 0140J;
RX   PubMed=19175920; DOI=10.1186/1471-2164-10-54;
RA   Ward P.N., Holden M.T.G., Leigh J.A., Lennard N., Bignell A., Barron A.,
RA   Clark L., Quail M.A., Woodward J., Barrell B.G., Egan S.A., Field T.R.,
RA   Maskell D., Kehoe M., Dowson C.G., Chanter N., Whatmore A.M., Bentley S.D.,
RA   Parkhill J.;
RT   "Evidence for niche adaptation in the genome of the bovine pathogen
RT   Streptococcus uberis.";
RL   BMC Genomics 10:54-54(2009).
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; AM946015; CAR42790.1; -; Genomic_DNA.
DR   RefSeq; WP_012658751.1; NC_012004.1.
DR   AlphaFoldDB; B9DUU0; -.
DR   SMR; B9DUU0; -.
DR   STRING; 218495.SUB1277; -.
DR   EnsemblBacteria; CAR42790; CAR42790; SUB1277.
DR   KEGG; sub:SUB1277; -.
DR   eggNOG; COG0190; Bacteria.
DR   HOGENOM; CLU_034045_2_1_9; -.
DR   OMA; HIVGRPM; -.
DR   OrthoDB; 1449514at2; -.
DR   UniPathway; UPA00193; -.
DR   Proteomes; UP000000449; Chromosome.
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;
KW   Reference proteome.
FT   CHAIN           1..284
FT                   /note="Bifunctional protein FolD"
FT                   /id="PRO_1000185630"
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"
SQ   SEQUENCE   284 AA;  31281 MW;  11974F6A2A3656DD CRC64;
     MTQIIDGKAL AQKMQSQLAK KVEDLKQEFG IVPGLVVILV GDNPASQVYV RNKERSAIAA
     GFKSETIRLS ESICQEELIK IIHRYNKDES IHGILVQLPL PTHINEKRII LEIDPHKDVD
     GFHPMNTGHL WSGRPIMVPC TPAGIMEMLS EYQIDLEGKH AVIIGRSNIV GKPMAQLLLD
     KNATVTLTHS RTRNLSKISS EADVLIVAIG QGHFVTEEYV KEGAVVIDVG MNRDDNGKLI
     GDVAFEEVSR KASYITPVPG GVGPMTITML LEQTYQSALR RVSS