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ISPH_PSEFL
ID   ISPH_PSEFL              Reviewed;         180 AA.
AC   P21864;
DT   01-MAY-1991, integrated into UniProtKB/Swiss-Prot.
DT   27-SEP-2017, sequence version 2.
DT   03-AUG-2022, entry version 87.
DE   RecName: Full=4-hydroxy-3-methylbut-2-enyl diphosphate reductase {ECO:0000255|HAMAP-Rule:MF_00191};
DE            Short=HMBPP reductase {ECO:0000255|HAMAP-Rule:MF_00191};
DE            EC=1.17.7.4 {ECO:0000255|HAMAP-Rule:MF_00191};
DE   Flags: Fragment;
GN   Name=ispH {ECO:0000255|HAMAP-Rule:MF_00191}; Synonyms=lytB;
OS   Pseudomonas fluorescens.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Pseudomonas.
OX   NCBI_TaxID=294;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 49323 / NCIMB 10586;
RX   PubMed=2121716; DOI=10.1128/jb.172.11.6512-6517.1990;
RA   Isaki L., Beers R., Wu H.C.;
RT   "Nucleotide sequence of the Pseudomonas fluorescens signal peptidase II
RT   gene (lsp) and flanking genes.";
RL   J. Bacteriol. 172:6512-6517(1990).
CC   -!- FUNCTION: Catalyzes the conversion of 1-hydroxy-2-methyl-2-(E)-butenyl
CC       4-diphosphate (HMBPP) into a mixture of isopentenyl diphosphate (IPP)
CC       and dimethylallyl diphosphate (DMAPP). Acts in the terminal step of the
CC       DOXP/MEP pathway for isoprenoid precursor biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00191}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + isopentenyl diphosphate + 2 oxidized [2Fe-2S]-
CC         [ferredoxin] = (2E)-4-hydroxy-3-methylbut-2-enyl diphosphate + 2 H(+)
CC         + 2 reduced [2Fe-2S]-[ferredoxin]; Xref=Rhea:RHEA:24488, Rhea:RHEA-
CC         COMP:10000, Rhea:RHEA-COMP:10001, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:33737, ChEBI:CHEBI:33738,
CC         ChEBI:CHEBI:128753, ChEBI:CHEBI:128769; EC=1.17.7.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00191};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=dimethylallyl diphosphate + H2O + 2 oxidized [2Fe-2S]-
CC         [ferredoxin] = (2E)-4-hydroxy-3-methylbut-2-enyl diphosphate + 2 H(+)
CC         + 2 reduced [2Fe-2S]-[ferredoxin]; Xref=Rhea:RHEA:24825, Rhea:RHEA-
CC         COMP:10000, Rhea:RHEA-COMP:10001, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:33737, ChEBI:CHEBI:33738,
CC         ChEBI:CHEBI:57623, ChEBI:CHEBI:128753; EC=1.17.7.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00191};
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00191};
CC       Note=Binds 1 [4Fe-4S] cluster per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00191};
CC   -!- PATHWAY: Isoprenoid biosynthesis; dimethylallyl diphosphate
CC       biosynthesis; dimethylallyl diphosphate from (2E)-4-hydroxy-3-
CC       methylbutenyl diphosphate: step 1/1. {ECO:0000255|HAMAP-Rule:MF_00191}.
CC   -!- PATHWAY: Isoprenoid biosynthesis; isopentenyl diphosphate biosynthesis
CC       via DXP pathway; isopentenyl diphosphate from 1-deoxy-D-xylulose 5-
CC       phosphate: step 6/6. {ECO:0000255|HAMAP-Rule:MF_00191}.
CC   -!- SIMILARITY: Belongs to the IspH family. {ECO:0000255|HAMAP-
CC       Rule:MF_00191, ECO:0000305}.
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DR   EMBL; M35366; AAA25886.1; -; Genomic_DNA.
DR   PIR; D37152; D37152.
DR   AlphaFoldDB; P21864; -.
DR   SMR; P21864; -.
DR   STRING; 690597.JH730966_gene5347; -.
DR   eggNOG; COG0761; Bacteria.
DR   UniPathway; UPA00056; UER00097.
DR   UniPathway; UPA00059; UER00105.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0051745; F:4-hydroxy-3-methylbut-2-en-1-yl diphosphate reductase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0050992; P:dimethylallyl diphosphate biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0019288; P:isopentenyl diphosphate biosynthetic process, methylerythritol 4-phosphate pathway; IEA:UniProtKB-UniPathway.
DR   CDD; cd13944; lytB_ispH; 1.
DR   InterPro; IPR003451; LytB/IspH.
DR   PANTHER; PTHR30426; PTHR30426; 1.
DR   Pfam; PF02401; LYTB; 1.
DR   TIGRFAMs; TIGR00216; ispH_lytB; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; Iron; Iron-sulfur; Isoprene biosynthesis; Metal-binding;
KW   Oxidoreductase.
FT   CHAIN           1..>180
FT                   /note="4-hydroxy-3-methylbut-2-enyl diphosphate reductase"
FT                   /id="PRO_0000128859"
FT   ACT_SITE        126
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   BINDING         12
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   BINDING         41
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   BINDING         74
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   BINDING         96
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   BINDING         124
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   BINDING         168
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00191"
FT   NON_TER         180
SQ   SEQUENCE   180 AA;  19824 MW;  DA87D6BBE8544390 CRC64;
     MQIKLANPRG FCAGVDRAIE IVNRALEVFG PPIYVRHEVV HNKFVVEDLR ARGAIFVEEL
     DQVKDDVIVI FSAHGVSQAV RTEAAGRGLK VFDATCPLVT KVHIEVARYS RDGRECILIG
     HAGHPEVEGT MGQYDASNGG AIYLVEDEKD VANLQVHNPE RLAFVTQTTL SMDDTSRVID
 
 
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