ID   RISA_CHLTR     STANDARD;      PRT;   199 AA.
AC   O84410;
DT   16-OCT-2001 (Rel. 40, Created)
DT   16-OCT-2001 (Rel. 40, Last sequence update)
DT   15-JUN-2002 (Rel. 41, Last annotation update)
DE   Riboflavin synthase alpha chain (EC 2.5.1.9).
GN   RIBE OR RIBC OR CT405.
OS   Chlamydia trachomatis.
OC   Bacteria; Chlamydiales; Chlamydiaceae; Chlamydia.
OX   NCBI_TaxID=813;
RN   [1]
RP   SEQUENCE FROM N.A.
RC   STRAIN=D/UW-3/Cx;
RX   MEDLINE=99000809; PubMed=9784136;
RA   Stephens R.S., Kalman S., Lammel C.J., Fan J., Marathe R., Aravind L.,
RA   Mitchell W.P., Olinger L., Tatusov R.L., Zhao Q., Koonin E.V.,
RA   Davis R.W.;
RT   "Genome sequence of an obligate intracellular pathogen of humans:
RT   Chlamydia trachomatis.";
RL   Science 282:754-759(1998).
CC   -!- FUNCTION: RIBOFLAVIN SYNTHASE IS A BIFUNCTIONAL ENZYME COMPLEX
CC       CATALYZING THE FORMATION OF RIBOFLAVIN FROM 5-AMINO-6-(1'-D)-
CC       RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE AND L-3,4-DIHYDROHY-2-
CC       BUTANONE-4-PHOSPHATE VIA 6,7-DIMETHYL-8-LUMAZINE. THE ALPHA
CC       SUBUNIT CATALYZES THE DISMUTATION OF 6,7-DIMETHYL-8-LUMAZINE TO
CC       RIBOFLAVIN AND 5-AMINO-6-(1'-D)-RIBITYL-AMINO-2,4(1H,3H)-
CC       PYRIMIDINEDIONE (BY SIMILARITY).
CC   -!- CATALYTIC ACTIVITY: 2 6,7-dimethyl-8-(1-D-ribityl)lumazine =
CC       riboflavin + 4-(1-D-ribitylamino)-5-amino-2,6-dihydroxypyrimidine.
CC   -!- PATHWAY: FINAL STEPS OF RIBOFLAVIN SYNTHESIS.
CC   -!- SUBUNIT: OLIGOMER THAT CONSIST OF 3 ALPHA SUBUNITS AND 60 BETA
CC       SUBUNITS (BY SIMILARITY).
CC   -!- SIMILARITY: TO BIOLUMINESCENCE ANTENNA PROTEINS LUXY (YFP) AND
CC       LUXL (LUMP).
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DR   EMBL; AE001313; AAC68002.1; -.
DR   InterPro; IPR001783; Lum_binding.
DR   Pfam; PF00677; Lum_binding; 2.
DR   ProDom; PD004110; Lum_binding; 1.
DR   TIGRFAMs; TIGR00187; ribE; 1.
DR   PROSITE; PS00693; LUM_BINDING; FALSE_NEG.
KW   Riboflavin biosynthesis; Transferase; Repeat; Complete proteome.
FT   REPEAT        1     95       1.
FT   REPEAT       96    194       2.
FT   SITE         79     83       BINDS TO LUMAZINE (PROBABLE).
FT   SITE        172    176       BINDS TO LUMAZINE (PROBABLE).
SQ   SEQUENCE   199 AA;  22222 MW;  C815DE0AC8534E16 CRC64;
     MFSGIIQEVA RVDLIHHLRD SMEIGVFARK LIDVVPGSSF SVDGICLTLV KRQYELLFFD
     VTEETMAWTT IKDYTVGTMV NLERSVRLGD EIGGHFVSGH VCGIGTIIAI EKSYMFFKAP
     ANLVPYILEK GFIAIDGISL TIARVKGDIF SVSLIPETRA RTSLGYKQVG AHVNMEPDMM
     TKMQVDTIMR FHAEKEISK
//