Crystal structure of the TtnD decarboxylase from the tautomycetin biosynthesis pathway of Streptomyces griseochromogenes with FMN bound at 2.05 A resolution

Enzyme Discovery for Natural Product Biosynthesis (NatPro)

Biochemical and Structural Characterization of TtnD, a Prenylated FMN-Dependent Decarboxylase from the Tautomycetin Biosynthetic Pathway.

TtnD decarboxylase from the tautomycetin biosynthesis pathway of Streptomyces griseochromogenes

MGSSHHHHHHSQDPNSMKRLKDLREYLAVLEAHQDVREIDEPVDPHLEAGAAARWTYENRGPALMLNDLTGTGRFCRILA
APAGLSTIPGSPLARVALSLGLDVSATAHEIVDSLAAARTREPVAPVVVDSAPCQDNVLLGDDANLDRFPAPLLHEGDGG
PYLNTWGTIIVSTPDGSFTNWAIARVMKIDGKRMTGTFIPTQHLGQIRKLWDNLGQPMPFAIVQGTEPGIPFVASMPLPD
GIEEVGFLGAYFGEPLELVRAKTVDLLVPASAEIVIEGHVMPGRTAVEGPMGEYAGYQPRHTSMQPEYVVDAITYRDDPI
WPISVAGEPVDETHTAWGLVTAAEALALLRAAKLPVATAWMPFEAAAHWLIVCLTEDWRERMPGLSRDGICLRISQVLAA
TRIEAMMTRVFVLDDDVDPSDQTELAWAIATRVSPAHGRLVRHGMINPLAGCYSAEERRLGYGPKAVLNGLLPPMAERSR
RSSFRHTYPEPVRQRVIELLA

ttnD gene cloned in pCDFDuet-1 between EcoRI and HindIII sites

3 mM TtnD1, 3 mM MnCl2, 0.5 mM FMN, 20% (v/v) glycerol in precipitant solution

Enzyme Discovery for Natural Product Biosynthesis

National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

apo TtnD decarboxylase from the tautomycetin biosynthesis pathway of Streptomyces griseochromogenes, P212121 form at 2.59 A

apo TtnD decarboxylase from the tautomycetin biosynthesis pathway of Streptomyces griseochromogenes, I222 form at 1.83 A

3mM TtnD1, 3mM MnCl2, 0.5 mM FMN, 20% glycerol in precipitant solution

GEL FILTRATION SUPPORTS THE ASSIGNMENT OF A TETRAMER AS THE BIOLOGICAL ASSEMBLY

1. TLS GROUPS WERE ASSIGNED WITH THE AID OF TLSMD. 2. ZERO OCCUPANCY HYDROGENS IN THEIR RIDING POSITION WERE USED AS ANTI-BUMPING RESTRAINTS. 3. LSSR TARGET RESTRAINTS TO THE APO TTND STRUCTURE (PDBID 6DA7) WERE INCLUDED. 4. CRYSTAL WAS SOAKED WITH FMN AS A MIMIC OF THE REQUIRED CO-FACTOR, PRENYLATED-FMN (prFMN). 4. AN UNKNOWN LIGAND (UNL) IS MODELED. THERE ARE 2 UNL's BOUND IN THE TETRAMER. THE SHAPE LOOKS LIKE BENZOATE OR NIACIN. THE SITE IS ON A CRYSTALLOGRPAHIC TWO-FOLD AXIS.

TtnD, decarboxylase, tautomycetin biosynthesis, prFMN binding, lyase, Structural Genomics, PSI-Biology, Enzyme Discovery for Natural Product Biosynthesis, NatPro

MKRLKDLREYLAVLEAHQDVREIDEPVDPHLEAGAAARWTYENRGPALMLNDLTGTGRFCRILAAPAGLSTIPGSPLARV
ALSLGLDVSATAHEIVDSLAAARTREPVAPVVVDSAPCQDNVLLGDDANLDRFPAPLLHEGDGGPYLNTWGTIIVSTPDG
SFTNWAIARVMKIDGKRMTGTFIPTQHLGQIRKLWDNLGQPMPFAIVQGTEPGIPFVASMPLPDGIEEVGFLGAYFGEPL
ELVRAKTVDLLVPASAEIVIEGHVMPGRTAVEGPMGEYAGYQPRHTSMQPEYVVDAITYRDDPIWPISVAGEPVDETHTA
WGLVTAAEALALLRAAKLPVATAWMPFEAAAHWLIVCLTEDWRERMPGLSRDGICLRISQVLAATRIEAMMTRVFVLDDD
VDPSDQTELAWAIATRVSPAHGRLVRHGMINPLAGCYSAEERRLGYGPKAVLNGLLPPMAERSRRSSFRHTYPEPVRQRV
IELLA