ID   4.1.99.12
DE   3,4-dihydroxy-2-butanone-4-phosphate synthase.
AN   DHBP synthase.
AN   L-3,4-dihydroxybutan-2-one-4-phosphate synthase.
CA   D-ribulose 5-phosphate = (2S)-2-hydroxy-3-oxobutyl phosphate + formate +
CA   H(+).
CC   -!- The reaction involves an intramolecular skeletal rearrangement, with
CC       the bonds in D-ribulose 5-phosphate that connect C-3 and C-5 to C-4
CC       being broken, C-4 being removed as formate and reconnection of C-3
CC       and C-5.
CC   -!- The phosphorylated four-carbon product (L-3,4-dihydroxybutan-2-one
CC       4-phosphate) is an intermediate in the biosynthesis of riboflavin.
DR   Q5A3V6, RIB3_CANAL ;  Q8TG90, RIB3_PYRO7 ;  O60181, RIB3_SCHPO ;
DR   Q99258, RIB3_YEAST ;  P47924, RIBA1_ARATH;  Q6Z234, RIBA1_ORYSJ;
DR   Q6NLQ7, RIBA2_ARATH;  Q0E079, RIBA2_ORYSJ;  A3MZA2, RIBBA_ACTP2;
DR   B3H0P8, RIBBA_ACTP7;  B0BTN8, RIBBA_ACTPJ;  P50855, RIBBA_ACTPL;
DR   O66679, RIBBA_AQUAE;  C3P7P7, RIBBA_BACAA;  C3LIX7, RIBBA_BACAC;
DR   A0RIB3, RIBBA_BACAH;  P51695, RIBBA_BACAM;  Q81MB6, RIBBA_BACAN;
DR   B7JLW6, RIBBA_BACC0;  Q731I5, RIBBA_BACC1;  B7IWM5, RIBBA_BACC2;
DR   C1EQY5, RIBBA_BACC3;  B7HAY4, RIBBA_BACC4;  B7HNM8, RIBBA_BACC7;
DR   A7GSD5, RIBBA_BACCN;  B9IWX4, RIBBA_BACCQ;  Q818X6, RIBBA_BACCR;
DR   Q635H0, RIBBA_BACCZ;  Q5LHT1, RIBBA_BACFN;  Q64YT3, RIBBA_BACFR;
DR   Q6HE54, RIBBA_BACHK;  A9VG50, RIBBA_BACMK;  P17620, RIBBA_BACSU;
DR   Q8A528, RIBBA_BACTN;  A7Z675, RIBBA_BACVZ;  C0ZKW2, RIBBA_BREBN;
DR   Q3B2I6, RIBBA_CHLL3;  Q9PLJ5, RIBBA_CHLMU;  A4SFY4, RIBBA_CHLPM;
DR   Q9Z734, RIBBA_CHLPN;  O84736, RIBBA_CHLTR;  A0Q3H7, RIBBA_CLONN;
DR   O24752, RIBBA_CORAM;  A4QEG9, RIBBA_CORGB;  Q8NQ52, RIBBA_CORGL;
DR   Q11WK6, RIBBA_CYTH3;  B1H0I0, RIBBA_ENDTX;  C5D3N0, RIBBA_GEOSW;
DR   A0QI09, RIBBA_MYCA1;  B1MCA4, RIBBA_MYCA9;  P0A5V1, RIBBA_MYCBO;
DR   A1KIK4, RIBBA_MYCBP;  C1AN60, RIBBA_MYCBT;  A4TC13, RIBBA_MYCGI;
DR   B2HP67, RIBBA_MYCMM;  Q741F1, RIBBA_MYCPA;  A5U2B7, RIBBA_MYCTA;
DR   P9WHF0, RIBBA_MYCTO;  P9WHF1, RIBBA_MYCTU;  A0PPL6, RIBBA_MYCUA;
DR   A1T8K1, RIBBA_MYCVP;  Q5YTP3, RIBBA_NOCFA;  A6LHN0, RIBBA_PARD8;
DR   B4SE30, RIBBA_PELPB;  A6KWQ7, RIBBA_PHOV8;  B2RIG7, RIBBA_PORG3;
DR   Q7MWK9, RIBBA_PORGI;  B4S5Y8, RIBBA_PROA2;  C0ZZE5, RIBBA_RHOE4;
DR   Q0S0K2, RIBBA_RHOJR;  A8LY38, RIBBA_SALAI;  A4X639, RIBBA_SALTO;
DR   Q5WH08, RIBBA_SHOC1;  Q5HF07, RIBBA_STAAC;  Q99TA0, RIBBA_STAAM;
DR   Q7A511, RIBBA_STAAN;  Q6GFT5, RIBBA_STAAR;  Q6G8G1, RIBBA_STAAS;
DR   Q8NW14, RIBBA_STAAW;  Q5HNE3, RIBBA_STAEQ;  Q8CNU2, RIBBA_STAES;
DR   Q4L7B1, RIBBA_STAHJ;  Q49YJ7, RIBBA_STAS1;  Q0AXM5, RIBBA_SYNWW;
DR   P74104, RIBBA_SYNY3;  Q9X2E6, RIBBA_THEMA;  B0KAI2, RIBBA_THEP3;
DR   B0K0Y9, RIBBA_THEPX;  A0KHV1, RIBB_AERHH ;  A4SKH7, RIBB_AERS4 ;
DR   Q8UE66, RIBB_AGRFC ;  Q9L6K8, RIBB_ALIFS ;  O28173, RIBB_ARCFU ;
DR   Q1LSL6, RIBB_BAUCH ;  Q7VQQ4, RIBB_BLOFL ;  Q7WDL7, RIBB_BORBR ;
DR   Q7W2M1, RIBB_BORPA ;  Q7VSF4, RIBB_BORPE ;  B8D8L7, RIBB_BUCA5 ;
DR   P57167, RIBB_BUCAI ;  Q8KA55, RIBB_BUCAP ;  B8D6X1, RIBB_BUCAT ;
DR   P59556, RIBB_BUCBP ;  Q9PHU4, RIBB_CAMJE ;  B3EEP4, RIBB_CHLL2 ;
DR   B3QWA4, RIBB_CHLT3 ;  Q7NQC4, RIBB_CHRVO ;  A8APS7, RIBB_CITK8 ;
DR   A7FXH7, RIBB_CLOB1 ;  A5I603, RIBB_CLOBH ;  A7GHE0, RIBB_CLOBL ;
DR   A7MP95, RIBB_CROS8 ;  Q46TZ9, RIBB_CUPPJ ;  C0QJB0, RIBB_DESAH ;
DR   B8FLF4, RIBB_DESAL ;  B8J4Q5, RIBB_DESDA ;  Q6AQE3, RIBB_DESPS ;
DR   A4J2L3, RIBB_DESRM ;  Q72B63, RIBB_DESVH ;  A1VD83, RIBB_DESVV ;
DR   A7ZRS4, RIBB_ECO24 ;  B7UIV5, RIBB_ECO27 ;  B7MAC3, RIBB_ECO45 ;
DR   B7LGI1, RIBB_ECO55 ;  P0A7J1, RIBB_ECO57 ;  B5YR87, RIBB_ECO5E ;
DR   B7NJQ5, RIBB_ECO7I ;  B7N0J6, RIBB_ECO81 ;  B7LZJ1, RIBB_ECO8A ;
DR   C4ZQV9, RIBB_ECOBW ;  B1XG46, RIBB_ECODH ;  A8A4J8, RIBB_ECOHS ;
DR   A1AFX0, RIBB_ECOK1 ;  Q0TD60, RIBB_ECOL5 ;  Q8FDH9, RIBB_ECOL6 ;
DR   B1ISB5, RIBB_ECOLC ;  P0A7J0, RIBB_ECOLI ;  B7ND35, RIBB_ECOLU ;
DR   B6I413, RIBB_ECOSE ;  B1LF38, RIBB_ECOSM ;  Q1R6T4, RIBB_ECOUT ;
DR   C5BHH8, RIBB_EDWI9 ;  A4WEI2, RIBB_ENT38 ;  B2VGK1, RIBB_ERWT9 ;
DR   B7LQC3, RIBB_ESCF3 ;  Q4QMD5, RIBB_HAEI8 ;  A5UDW2, RIBB_HAEIE ;
DR   A5UHR8, RIBB_HAEIG ;  P44866, RIBB_HAEIN ;  C4K8P2, RIBB_HAMD5 ;
DR   Q7VJN5, RIBB_HELHP ;  Q9ZL40, RIBB_HELPJ ;  O25484, RIBB_HELPY ;
DR   Q0I132, RIBB_HISS1 ;  B0UX44, RIBB_HISS2 ;  B5XU43, RIBB_KLEP3 ;
DR   A6TE29, RIBB_KLEP7 ;  Q65W81, RIBB_MANSM ;  C6BVV4, RIBB_MARSD ;
DR   Q8TT89, RIBB_METAC ;  Q60364, RIBB_METJA ;  A2SQG6, RIBB_METLZ ;
DR   Q8PW86, RIBB_METMA ;  O27543, RIBB_METTH ;  Q9JU97, RIBB_NEIMA ;
DR   Q9JZ77, RIBB_NEIMB ;  Q8CWF6, RIBB_OCEIH ;  Q313P5, RIBB_OLEA2 ;
DR   P57940, RIBB_PASMU ;  Q6D8S3, RIBB_PECAS ;  C6D9P9, RIBB_PECCP ;
DR   A1AKS6, RIBB_PELPD ;  Q02008, RIBB_PHOLE ;  Q7N0C8, RIBB_PHOLL ;
DR   P51962, RIBB_PHOPO ;  Q6LIW0, RIBB_PHOPR ;  B4EW41, RIBB_PROMH ;
DR   Q9HWX4, RIBB_PSEAE ;  Q88QG4, RIBB_PSEPK ;  Q882G0, RIBB_PSESM ;
DR   Q3IKS6, RIBB_PSET1 ;  Q8XQN1, RIBB_RALN1 ;  Q2RS98, RIBB_RHORT ;
DR   B5F690, RIBB_SALA4 ;  A9MPW6, RIBB_SALAR ;  Q57JR5, RIBB_SALCH ;
DR   B5FHS9, RIBB_SALDC ;  B5QZ31, RIBB_SALEP ;  B5REF3, RIBB_SALG2 ;
DR   B4TI45, RIBB_SALHS ;  B4T665, RIBB_SALNS ;  Q5PMU5, RIBB_SALPA ;
DR   A9N5X2, RIBB_SALPB ;  C0PYW8, RIBB_SALPC ;  B5BG06, RIBB_SALPK ;
DR   B4TVS9, RIBB_SALSV ;  P66033, RIBB_SALTI ;  P66032, RIBB_SALTY ;
DR   A8GJU0, RIBB_SERP5 ;  B8E3W7, RIBB_SHEB2 ;  A3DAC1, RIBB_SHEB5 ;
DR   A6WHL6, RIBB_SHEB8 ;  A9KVB7, RIBB_SHEB9 ;  Q07WC1, RIBB_SHEFN ;
DR   B0TMY9, RIBB_SHEHH ;  A3Q8W5, RIBB_SHELP ;  Q8EKF2, RIBB_SHEON ;
DR   A8GYS3, RIBB_SHEPA ;  A4Y1N7, RIBB_SHEPC ;  B8CH19, RIBB_SHEPW ;
DR   A0KRF9, RIBB_SHESA ;  A8G1K1, RIBB_SHESH ;  Q0HP01, RIBB_SHESM ;
DR   Q0I0H0, RIBB_SHESR ;  A1RPZ7, RIBB_SHESW ;  B1KNY2, RIBB_SHEWM ;
DR   B2U1F0, RIBB_SHIB3 ;  Q31WZ1, RIBB_SHIBS ;  Q32BS1, RIBB_SHIDS ;
DR   Q0T0L7, RIBB_SHIF8 ;  P0A7J2, RIBB_SHIFL ;  Q3YXK0, RIBB_SHISS ;
DR   Q2NWD7, RIBB_SODGM ;  O68249, RIBB_SULMU ;  Q3A668, RIBB_SYNC1 ;
DR   C4LDD2, RIBB_TOLAT ;  B7VT10, RIBB_VIBA3 ;  A5F159, RIBB_VIBC3 ;
DR   Q9KKP2, RIBB_VIBCH ;  C3LWX2, RIBB_VIBCM ;  P16448, RIBB_VIBHA ;
DR   Q87GR5, RIBB_VIBPA ;  Q8D485, RIBB_VIBVU ;  Q7MFR0, RIBB_VIBVY ;
DR   Q8D2W5, RIBB_WIGBR ;  Q7M936, RIBB_WOLSU ;  A1JQV2, RIBB_YERE8 ;
DR   A7FE82, RIBB_YERP3 ;  Q1C377, RIBB_YERPA ;  B2K2H0, RIBB_YERPB ;
DR   Q8ZI56, RIBB_YERPE ;  A9R7D2, RIBB_YERPG ;  Q1CMD1, RIBB_YERPN ;
DR   A4THU2, RIBB_YERPP ;  Q665V6, RIBB_YERPS ;  B1JM30, RIBB_YERPY ;
//