Publications
Lohman JR, Huang SX, Horsman GP, Dilfer PE, Huang T, Chen Y, Wendt-Pienkowski E, Shen B (2013) Cloning and sequencing of the kedarcidin biosynthetic gene cluster from Streptoalloteichus sp. ATCC 53650 revealing new insights into biosynthesis of the enediyne family of antitumor antibiotics. Mol Biosyst, 9:478-491.
Ruzzini AC, Horsman GP, Eltis LD (2012) The catalytic serine of MCP hydrolases is activated differently for C-O bond cleavage than for C-C bond cleavage. Biochemistry, 51:5831-5840.
Lin S, Huang T, Horsman GP, Huang SX, Guo X, Shen B (2012) Specificity of the ester bond-forming condensation enzyme SgcC5 in C-1027 biosynthesis. Org Lett, 14:2300-2303.
Ruzzini AC, Ghosh S, Horsman GP, Foster LJ, Bolin JT, Eltis LD (2012) Identification of an acyl-enzyme intermediate in a meta-cleavage product hydrolase reveals the versatility of the catalytic triad. J Am Chem Soc, 134:4615-4624.
Chen Y, Yin M, Horsman GP, Shen B (2011) Improvement of the enediyne antitumor antibiotic C-1027 production by manipulating its biosynthetic pathway regulation in Streptomyces globisporus. J Nat Prod, 74:420-424.
Horsman GP, Chen Y, Thorson JS,
Shen B (2010) Polyketide synthase chemistry does not direct biosynthetic
divergence between 9- and 10-membered enediynes. Proc Natl Acad Sci USA 107:11331-11335. A news report describing
this work appeared in Chem & Eng
News (June 14, 2010) 88(24):39.
Ling J, Horsman GP, Huang S-X, Luo Y, Lin S,
Shen B (2010) Enediyne antitumor antibiotic maduropeptin biosynthesis featuring a
C-methyltransferase that acts on a CoA-tethered aromatic substrate.
J Am Chem Soc 132:12534-12536.
Lin S, Horsman GP, Shen B (2010) Characterization
of the epoxide hydrolase NcsF2 from the neocarzinostatin biosynthetic gene
cluster. Org Lett 12:3816-3819.
Chen Y, Yin M, Horsman GP, Huang S, Shen B
(2010) Manipulation of pathway regulation in Streptomyces globisporus for overproduction of the enediyne
antitumor antibiotic C-1027. J Antibiot
63:482-485.
Lack NA, Yam KC, Lowe ED, Horsman GP, Nobel
R, Sim E, Eltis LD (2010) Characterization of a C-C hydrolase from Mycobacterium tuberculosis involved in
cholesterol metabolism. J Biol Chem 285:434-443.
Horsman GP, Van Lanen SG, Shen B
(2009) Iterative type I polyketide synthases for enediyne core biosynthesis. Methods Enzymol 459:97-112.
Van Lanen SG, Lin S, Horsman GP, Shen B
(2009) Characterization of SgcE6, the flavin reductase component supporting
FAD-dependent halogenation and hydroxylation in the biosynthesis of the
enediyne antitumor antibiotic C-1027. FEMS Microbiol Lett 300:237-241.
Lin S, Horsman GP, Chen Y, Li W, Shen B
(2009) The SgcF epoxide hydrolase from the enediyne antitumor antibiotic C-1027
biosynthetic pathway generates an (R)-vicinal diol via an enantioconvergent
process. J Am Chem Soc 131:16410-16417.
Bhowmik S*, Horsman GP*, Bolin JT, Eltis LD
(2007) The molecular basis for inhibition of BphD, a C-C bond hydrolase
involved in PCB degradation: large 3-substituents prevent tautomerization. J Biol Chem 282:36377-36385 (*shared
first authorship).
Horsman GP*, Bhowmik S*, Seah SYK,
Kumar P, Bolin JT, Eltis LD (2007) The tautomeric half-reaction of BphD, a C-C
bond hydrolase: kinetic and structural evidence supporting a key role for
histidine 265 of the catalytic triad. J
Biol Chem 282:19894-19904.
Seah SYK, Ke J, Denis G, Horsman GP, Fortin
PD, Whiting CJ, Eltis LD (2007) Characterization of a C-C bond hydrolase from Sphingomonas wittichii RW1 with novel
specificities towards PCB metabolites. J
Bacteriol 189:4038-4045.
Horsman GP, Ke J, Dai S, Seah SYK,
Bolin JT, Eltis LD (2006) Kinetic and structural insight into the mechanism of
BphD, a C-C bond hydrolase from the biphenyl degradation pathway. Biochemistry 45:11071-11086.
Fortin PD, Horsman GP, Yang HM, Eltis LD
(2006) A glutathione S-transferase
catalyzes the dehalogenation of inhibitory PCB metabolites. J Bacteriol 188:4424-4430.
Horsman GP, Jirasek A, Vaillancourt
FH, Barbosa CJ, Jarzecki AA, Xu C, Mekmouche Y, Spiro TG, Lipscomb JD, Blades
MW, Turner RFB, Eltis LD (2005) Spectroscopic studies of the anaerobic
enzyme-substrate complex of catechol 1,2-dioxygenase. J Am Chem Soc 127:16882-16891.
Park S, Morley KL, Horsman GP, Holmquist M, Hult
K, Kazlauskas RJ (2005) Focusing
mutations into the P. fluorescens esterase binding site increases
enantioselectivity more effectively than distant mutations. Chem
Biol 12:45-54.
Jirasek A, Horsman GP, Vaillancourt FH,
Barbosa CJ, Eltis LD, Blades MW, Turner RFB (2004) Probing enzyme-substrate interactions using fiber-optic ultraviolet
resonance Raman spectroscopy. Am Pharm Rev 7:49-53 (Invited Review).
Horsman GP, Liu A, Henke E,
Bornscheuer UT, Kazlauskas RJ (2003) Mutations
in distant residues moderately increase the enantioselectivity of P.
fluorescens esterase towards methyl 3-bromo-2-methylpropanoate and ethyl
3-phenylbutyrate. Chem Eur J 9:1933-1939.
Liu AMF, Somers NA, Kazlauskas RJ, Brush TS, Zocher
F, Enzelberger MM, Bornscheuer UT, Horsman GP, Mezzetti A,
Schmidt-Dannert C, Schmid RD (2001) Mapping the substrate selectivity of new
hydrolases using colorimetric screening: lipases from Bacillus thermocatenulatus and Ophiostoma
piliferum, esterases from Pseudomonas
fluorescens and Streptomyces diastatochromogenes. Tetrahedron:
Asymmetry 12:545-556.
Beriault JN, Horsman GP, Devine MD (1999)
Phloem transport of D,L-glufosinate and acetyl-L-glufosinate in
glufosinate-resistant and -susceptible B.
napus. Plant Physiol 121:619-627.

