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Faculty


Nicole S. Sampson

Nicole S. Sampson, Professor

B.S. Harvey Mudd College, 1985
Ph.D. University of California, Berkeley, 1990
American Cancer Society Postdoctoral Fellowship, Harvard University, 1991-1993

659 Chemistry
Phone: (631) 632-7952 | Fax: (631) 632-5731
Email: nicole.sampson@stonybrook.edu

The Sampson Group Website

Positions

Member of Graduate Programs in: Chemistry, Biochemistry & Structural Biology, Molecular & Cellular Pharmacology

Co-Director Chemical Biology Training Program

Member of Institute of Chemical Biology and Drug Discovery

 

Chemical Biology, Enzymology & Metabolomics

The research in our laboratory focuses on understanding the relationship between protein structure and protein function and synthesizing chemical tools to probe and control biological function. Work is ongoing in three different areas:

  • Precision Polymer Synthesis for Studying Fertilization and Cholera Intoxication
  • Lipid-Protein Interactions
  • Tuberculosis Drug Discovery and Diagnosis through Mycobacterial Steroid Metabolism 

Awards/Honors

  • Camille and Henry Dreyfus Foundation New Faculty Award, 1993-1998
  • National Science Foundation Career Award, 1996-2000
  • American Chemical Society Arthur C. Cope Scholar Award, 2001
  • American Chemical Society Pfizer Award in Enzyme Chemistry, 2005
  • Research Foundation of SUNY Research and Scholarship Award, 2005
  • American Chemical Society Fellow, 2017
  • Fellow Stellenbosch Institute for Advanced Study, 2017

Publications

Rui Lu, Christin M. Schaefer, Natasha M. Nesbitt, Jochen Kuper, Caroline Kisker, and Nicole S. Sampson  
"Catabolism of the Cholesterol Side Chain in Mycobacterium tuberculosis is Controlled by a Redox-Sensitive Thiol Switch," ACS Infectious Diseases, DOI: 10.1021/acsinfecdis.7b00072
TOC
Lee, S., and Sampson, N. S. (2017) “A cleavable cyclic acetal for affinity capture, release, and conjugation”, in press, Methods in Molecular Biology.
Nelson, R. K., Ya-Ping, J., Gadbery, J., Abedeen, D., Sampson, N.S., Lin, R. Z., and Frohman, M. (2017) “Phospholipase D2 loss results in increased blood pressure via inhibition of the eNOS pathway,” Scientific Reports, in press.
Huang, H., Rodolis, M. T., Bhatia, S. R., and Sampson, N. S. (2017) "Sugars require rigid multivalent displays for activation of mouse sperm acrosomal exocytosis," Biochemistry, DOI: 10.1021/acs.biochem.7b00166.
Rodolis, M., Huang, J., and Sampson, N. S. (2016) “Glycopolymer Induction of Mouse Sperm Acrosomal Exocytosis Shows Highly Cooperative Self-Antagonism,” 474, 435-440. , DOI: 10.1016/j.bbrc.2016.05.003.
Charkoudian, L. K., Sampson, N. S., Kumar, K. and Kritzer, J. A. (2016) “Designing convergent chemistry curricula,” Nature Chemical Biology, 12, 382–386. doi:10.1038/nchembio.2090 – Commentary
 
Ueki, N., Wang, W., Swenson, C., McNaughton, C., Sampson, N. S., and Hayman, M. J. (2016) “Synthesis and Preclinical Evaluation of a Highly Improved Anticancer Prodrug Activated by Histone Deacetylases and Cathepsin L,” Theranostics, 6, 808-816. DOI:10.7150/thno.13826
Parker, K. A., Sampson, N. S. (2016) “From ROMP to AROMP: using substituted cyclobutenes to precisely control polymer structure,” Accounts of ChemicalResearch49, 408-417. DOI: 10.1021/acs.accounts.5b00490 

Lu, R, Schmitz, W., and Sampson, N. S. (2015) “α-Methyl Acyl CoA racemase provides Mycobacterium tuberculosis catabolic access to cholesterol esters,” Biochemistry, 54, 5669-5672. DOI: 10.1021/acs.biochem.5b00911 

 

 

Touchette, M. H., Bommineni, G. R., Delle Bovi, R. J., Gadbery, J. E., Nicora, C. D., Shukla, A. K., Kyle, J. E., Metz, T. O., Martin, D. W., Sampson, N. S., Miller, W. T., Tonge, P. J., and Seeliger, J. C. (2015) "Diacyltransferase activity and chain length specificity of Mycobacterium tuberculosis PapA5 in the synthesis of alkyl β-diol lipids," Biochemistry, 54, 5457-5468. DOI: 10.1021/acs.biochem.5b00455

 

Lee, S., Wang, W., Lee, Y. and Sampson, N. S. (2015) "Cyclic acetals as cleavable linkers for affinity capture," Organic and Biomolecular Chemistry,  13, 8445-8452. DOI: 10.1039/C5OB01056J


 

 

Tan, L., Li, G., Parker, K. A. and Sampson, N. S. (2015) "Ru-catalyzed isomerization provides access to alternating copolymers via ring-opening metathesis polymerization," Macromolecules48, 4793-4800. DOI: 10.1021/acs.macromol.5b01058

 
 
Yang, M., Lu, R. Guja, K. E., Wipperman, M., St. Clair, J. Bonds, A., Garcia-Diaz, M. And Sampson, N. S. (2015) “Unraveling cholesterol catabolism in Mycobacterium tuberculosis: the ChsE4-ChsE5 α2β2 acyl-CoA dehydrogenase initiates β-oxidation of 3-oxo-cholest-4-en-26-oyl CoA,” ACS Infectious Disease, 1, 110-125DOI: 10.1021/id500033m
Schaefer, C., Lu, R., Nesbitt, N. M., Schiebel, J. Sampson, N. S., and Kisker, C. (2015) “FadA5 a thiolase from Mycobacterium tuberculosis – a unique steroid-binding pocket reveals the potential for drug development against tuberculosis,” Structure23, 21-33. DOI: 10.1016/j.str.2014.10.010  See Commentary

 

 
 
Yang, M., Guja, K. E., Thomas, S. T., Garcia-Diaz, M. And Sampson, N. S. (2014) “A distinct MaoC-like enoyl-CoA hydratase architecture mediates cholesterol catabolism in Mycobacterium tuberculosis,” ACS Chemical Biology, 9, 2632-2645 DOI: 10.1021/cb500232h
 
 
Tan, L., Parker, K., and Sampson, N. S. (2014) “A Bicyclo[4.2.0]octene-derived monomer provides completely linear alternating copolymers via alternating ring-opening metathesis polymerization (AROMP),” Macromolecules47, 6572-6579 DOI: 10.1021/ma5012039 
https://sites.google.com/a/stonybrook.edu/nicolesampson/publications/TOC_revised.jpg

 
Wipperman, M., Sampson, N. S., and Thomas, S. T. (2014) “Pathogen “Roid Rage”: Cholesterol Utilization by Mycobacterium tuberculosis,” CRC Critical Reviews in Biochemistry49, 269-293 DOI 10.3109/10409238.2014.895700.
 
Gao, J. and Sampson, N. S. (2014) “A GMC Oxidoreductase Homolog is Required for Acetylation of Glycopeptidolipid in Mycobacterium smegmatis,” Biochemistry 53, 611-613 DOI: 10.1021/bi4015083
 

 
Wu, L., and Sampson, N. S. (2014) “Fucose, Mannose and β-N-Acetylglucosamine Glycopoly-mers Initiate the Mouse Sperm Acrosome Reaction Through Convergent Signaling Pathways,” ACS Chem. Biol. 9, 468-475 DOI: 10.1021/cb400550j

 

 

Evensen N.A., Li J., Yang J., Yu X., Sampson N.S., Zucker, S., Cao, J. (2013) “Development of A High-throughput Screening Invasion Assay for Anti-Cancer Drug Discovery,” PLoS One8(12): e82811DOI: 10.1371/journal.pone.0082811


Ueki, N. Lee, S. Sampson, N. S., Hayman, M. J. (2013) “Selective cancer targeting with prodrugs activated by histone deacetylase and tumour-associated protease,” Nature Comm., 4, 2735-2742. DOI: 10.1038/ncomms3735    

Commentary: New Scientist  Genetic Engineering and Biotech News


Romulus, J., Tan, L., Weck, M., Sampson, N. S. (2013) “Alternating ROMP copolymers containing charge-transfer units,” ACS Macro Letters, 2749-752. DOI: 10.1021/mz4002673


Wipperman, M.F., Yang, M., Thomas, S.T., Sampson, N.S. (2013) “Shrinking the FadE proteome of Mycobacterium tuberculosis: Insights into cholesterol metabolism through identification of an α2β2 heterotetrameric acyl-CoA dehydrogenase family,” J Bacteriol. 195 (19): 4331-41. DOI: 10.1128/JB.00502-13 See commentary at DOI: 10.1128/JB.00867-13


Su, C.Y., London, E., Sampson, N.S. (2013“Mapping peptide thiol accessibility in membranes using a quaternary ammonium isotope-coded mass tag (ICMT),” Bioconjug Chem.  24 (7), pp 1235–1247. DOI: 10.1021/bc400171j


Thomas, S.T., Sampson, N.S. “Mycobacterium tuberculosis utilizes a unique heterotetrameric structure for dehydrogenation of the cholesterol side chain,” Biochemistry, (2013), 52, 17, 2895-904. DOI:  10.1021/bi4002979

 

Slayden, R.A., Jackson, M., Zucker, J., Ramirez, M.V., Dawson, C.C., Crew, R., Sampson, N.S., Thomas, S.T., Jamshidi, N., Sisk, P., Caspi, R., Crick, D.C., McNeil, M.R., Pavelka, M.S., Niederweis, M., Siroy, A., Dona, V., McFadden, J., Boshoff, H., Lew, J.M. (2013) “Updating and curating metabolic pathways of TB,” Tuberculosis, 93, 1, 47-59. DOI: 10.1016/j.tube.2012.11.001

Thomas, S.T., VanderVen, B.C., Sherman, D.R., Russell, D.G., Sampson, N.S. “Pathway profiling in Mycobacterium tuberculosis: elucidation of cholesterol-derived catabolite and enzymes that catalyze its metabolism,” J. Biol. Chem, (2011), 286, 51, 43668-78. DOI: 10.1074/jbc.M111.313643


Zarrabi, K.; Dufour, A.; Li, J; Kuscu, C.; Kozarekar, P.; Zhi, J.; Sampson, N. S.; Zucker, S.; Cao, J. (2011) “Inhibition of matrix metalloproteinase-14 (MMP-14)-mediated cancer cell migration,” J. Biol. Chem., 286, 38, 33167-77. DOI: 10.1074/jbc.M111.256644


Dufour, A.; Sampson, N. S.; Rizzo, R; DeLeon, J; Li, J; Kuscu, C.; Zhi, J.; Jaber, N.; Liu, E.; Zucker, S.; Cao, J. (2011) “Small molecule anti-cancer therapy selectively targets the hemopexin domain of matrix metalloproteinase-9 (MMP-9),” Cancer Res., 71, 4977-4988. DOI: 10.1158/0008-5472.CAN-10-4552


Thomas, S.; Yang, X.; Sampson, N. S. (2011), “Inhibition of the M. tuberculosis 3Beta-Hydroxysteroid Dehydrogenase by Azasteroids,” Bioorg. Med. Chem. Lett., 21, 2216-2219. DOI: 10.1016/j.bmcl.2011.03.004


Song, A.; Walker, S. G.; Parker, K. A.; Sampson, N. S. (2011) “Antibacterial studies of alternating, random and homo-polymers with varied positions of cationic side chains,” ACS Chem. Biol., 6, 590-599. DOI: 10.1021/cb100413w

 

Yang, X.; Gao, J.; Smith, I.; Dubnau, E.; Sampson, N. S. (2011), “Cholesterol Is not an essential source of nutrition for Mycobacterium tuberculosis during infection,” J. Bact., 193, 1473-147. DOI: 10.1128/JB.01210-10

 

Dufour, A., Sampson, N. S., Kuscu, C., Zucker, S. and Cao, J. (2010) “Roles of MMP-9 homodimer and heterodimer in cell migration,”J. Biol. Chem., 285, 35944-56. DOI: 10.1074/jbc.M109.091769

 

Song, A.; Parker, K. A.; Sampson, N. S. (2010) “Cyclic alternating ROMP (CAROMP). Rapid access to functionalized cyclic polymers,”Org. Lett. 123729-3731. DOI: 10.1021/ol101432m

 

Song, A.; Lee, J.; Parker, K. A.; Sampson, N. S. (2010) “Scope of the ring opening metathesis polymerization (ROMP) reaction of 1-substituted cyclobutenes,” J. Am. Chem. Soc., 132, 10513–10520. DOI: 10.1021/ja1037098

 

Nesbitt, N. M.*; Yang, X.*; Fontán, P.; Kolesnikova, I.; Smith, I.; Sampson, N. S.*; Dubnau, E.* (2010) “A thiolase of M. tuberculosis is required for virulence and for production of androstenedione and androstadienedione from cholesterol,” Infect. Immun., 78. 275-282. *co-authors DOI: 10.1128/IAI.00893-09 

 

Lyubimov, A. Y.; Chen, L.; Sampson, N. S.; Vrielink, A. (2009) “A hydrogen-bonding network is important for oxidation and isomerization in the reaction catalyzed by cholesterol oxidase,” Acta Crys. D, 65, 1222-1231. DOI: 10.1107/S0907444909037421

 

Kreit, J; Sampson, N. S. (2009) “Cholesterol oxidase: Physiological functions,” FEBS,276, 6844-6856. DOI: 10.1111/j.1742-4658.2009.07378.x

 

Yang, X.; Nesbitt, N. M.; Dubnau, E.; Smith, I.; Sampson, N. S. (2009), “Cholesterol metabolism increases the metabolic pool of propionate in M. tuberculosis,” Biochemistry, 48, 3819-3821. DOI: 10.1021/bi9005418

 

Baessler, K.; Lee, Y.; Sampson, N. S. (2009) “Beta1 Integrin is an adhesion protein for sperm binding to eggs,” ACS Chem. Biology, 4, 357-366. DOI: 10.1021/cb900013d

 

Song, A..; Parker, K.*; Sampson, N. S.* (2009) “Synthesis of copolymers by alternating romp (AROMP),” J. Am. Chem. Soc., 131, 3444–3445. DOI: 10.1021/ja809661k

 

Lee, Y.; Sampson, N. S. (2009) “Polymeric ADAM protein mimics interrogate mammalian sperm-egg binding,” ChemBioChem, 10, 929-937. DOI: 10.1002/cbic.200800791

 

Dufour, A.; Sampson, N. S.; Zucker, S.; Cao, J. (2008) “Role of the hemopexin domain of matrix metalloproteinase-9 in cell migration,” J. Cell Physiol., 217, 643-651. DOI: 10.1002/jcp.21535

 

Elalami, A; Baessler, K.; Kong, F.; Sampson, N. S.; Kreit, J. (2008) “Subcellular forms of cholesterol oxidase from Rhodococcus sp. CIP 105 335:  induction, solubilization and characterization,” in Current Research Topics in Applied Microbiology and Microbial Biotechnology, World Scientific Publishing. 

Chen, L.; Lyubimov, A. Y.; Vrielink, A.; Sampson, N. S. (2008) “The binding and release of oxygen and hydrogen peroxide are directed by a hydrophobic tunnel in cholesterol oxidase.,” Biochemistry, 47, 5368–5377. DOI: 10.1021/bi800228w

 

Sampson, N. S. and Kwak, S. (2008) “ Catalysis at the membrane Interface:  Cholesterol oxidase as a case study“, in Proceedings of the 3rd International Beilstein Workshop on Experimental Standard Conditions of Enzyme Characterizations. Beilstein, Germany. DOI: n/a

Yang, X; Dubnau, E. Smith, I; Sampson, N. S. (2007) “Rv1106c from Mycobacterium tuberculosis is a 3b-hydroxysteroid dehydrogenase,Biochemistry,46, 9058-9067. DOI: 10.1021/bi700688x

Nesbitt, N. M.; Sampson, N.S. (2007) “Antifungal Tradecraft by Cholesterol Oxidase,” Chem. Biol. 14238-241DOI: 10.1016/j.chembiol.2007.03.003

Lyubimov, A. Y.; Heard, K. Tang, H.; Sampson, N. S; Vrielink, A. (2007) “Distortion of flavin geometry linked to ligand binding in cholesterol oxidase,” Protein Science, 16, 2647-2656. PMC2222809

Kempf, J. G.; Jung, J-y.; Ragain, C.; Sampson, N. S.; Loria, J. P. (2007) “Dynamic requirements for a functional protein hinge,” J. Mol. Biol.368, 131-149DOI: 10.1016/j.jmb.2007.01.074

Lee, Y.; Baessler, K.; Sampson, N. S. (2006) “ROMP of norbornyl oligopeptides:  A versatile synthetic method for exploring receptor topology,” in Understanding Biology Using Peptides, S. Blondelle, ed., American Peptide Society (2005), 59-60. DOI: 

Lee, Y.; Sampson, N. S. (2006) “ROMPing the Cellular Landscape: Linear Scaffolds for Molecular Recognition,” Curr. Opin. Struct. Biol. 16, 544-550DOI: 10.1016/j.sbi.2006.05.015

Lee, J; Parker, K. L.*; Sampson, N. S.* (2006) “Amino Acid-Bearing ROMP polymers with a Stereoregular Backbone,” J. Am. Chem. Soc. 128, 4578-4579. DOI: 10.1021/ja058801v

 

Baessler, K.; Lee, Y.; Roberts, K. S.; Facompre, N.; Sampson, N. S. (2006) “Multivalent fertilin beta oligopeptides: the dependence of fertilization inhibition on length and density,” Chem. Biol. 13, 251-259. DOI: 10.1016/j.chembiol.2005.12.010

 

Lee, Y.; Sampson, N. S.; (2006) “ROMPing the Cellular Landscape: Linear Scaffolds for Molecular Recognition,” Curr. Opin. Struct. Biol. 16, 544-550. DOI: 10.1016/j.sbi.2006.05.015

 

Baessler, K.; Lee, Y.; Sampson, N.S. (2005) “ROMP of norbonyl oligopeptides: A versatile synthetic method for exploring receptor topology, “in Understanding Biology Using Peptides, S. Blondelle, ed. American Peptide Society,59-60. DOI: 

Roberts, S. K.; Sampson, N. S. (2004) "A Facile Synthetic Route Leading to Fluorescently Labeled ROMP Polymers,” Org. Lett., 6, 3253-3255. DOI: 10.1021/ol048935y

 

Xiang, J.; Jung, J-y.; Sampson, N. S. (2004) “Entropy Effects on Protein Hinges: the Reaction Catalyzed by Triosephosphate Isomerase,”Biochemistry, 43, 11436-11445. DOI: 10.1021/bi049208d

 

Kursula, I.; Salin, M.; Sun, J.; Borledge, B.; Haapalainen, A.; Sampson, N. S.; Wierenga, R. K. (2004) "Understanding Protein Lids: Structural Analysis of Active Hinge Mutants in Triosephosphate Isomerase," Prot. Engineering, Design Selection, 17, 375-382. DOI: 10.1093/protein/gzh048

 

Xiang, J.; Sampson, N. S. (2004) "Library Screening Studies to Investigate Substrate Specificity in the Reaction Catalyzed by Cholesterol Oxidase," Prot. Engineering, Design Selection, 17, 341-348. DOI: 10.1093/protein/gzh041

 

Konkar, S.; Gupta, S.; Sampson, N. S. (2004) “Fertilinb Liposomes Inhibit In Vitro Fertilization by Steric Stabilization,” Bioorg. Med. Chem. Lett. 4, 1381-1384. DOI:

Ahn, K-w.; Sampson, N. S. (2004) “Cholesterol Oxidase Senses Subtle Changes in Lipid Structure,” Biochemistry 43, 827-836. DOI: 10.1021/bi035697q

Vrielink, A.; Sampson, N. S.; (2003) “Sub-Ångstrom Resolution Protein Structures: Is Seeing Believing?,” Curr. Opin. Struct. Biol. 13, 709-713. DOI: 10.1016/j.sbi.2003.10.012

 

Kempf, J. G.; Jung, J-y.; Sampson, N. S.; Loria, J. P. (2003) Off-Resonance TROSY (R1p-R1) for Quantitation of Fast Exchange Processes in Large Proteins,” J. Am. Chem. Soc. 125, 12064-12065. DOI: 10.1021/ja037101s

 

Sampson, N. S.; Vrielink, A. (2003) “Cholesterol Oxidases: A Study of Nature’s Approach to Protein Design,” Acc. Chem. Res 36, 713-722. DOI: 10.1021/ar9800587

 

Roberts, S. K.; Konkar, S.; Sampson, N. S. (2003) “Comparison of Fertilinb Peptide-Substituted Polymers and Liposomes as Inhibitors ofIn Vitro Fertilization,” ChemBioChem 4, 1229-1231. DOI: 10.1002/cbic.200300672

Lario, P.; Sampson, N.S.; Vrielink, A. (2003) “Sub-atomic resolution crystal structure of cholesterol oxidase: What atomic resolution crystallography reveals about enzyme mechanism and the role of the FAD cofactor in redox activity,” J. Mol. Biol. 326 1635-1650. DOI:

Roberts, S.K.; Sampson, N. S. (2003) “Increased Polymer Length of Oligopeptide-substituted Polynorbornenes using LiCl,” J. Org. Chem.68, 2020-2023. DOI:

Ye, Y.; Liu, Pingsheng; Anderson, R.; Sampson, N. S. (2002) "Construction of a Catalytically Inactive Cholesterol Oxidase Mutant: Investigation of the Interplay Between Active Site Residues Glutamate 361 and Histidine 447," Arch. Biochem Biophys. 402, 235-242. DOI:

Li, H.; Sampson, N. S. (2002) "Structural Analysis of Cyclic Peptide Fertilinb Mimics That Are Ligands for a6b1 Integrin," J. Pep. Res. 59, 49-54. DOI:

Gupta, S.; Sampson, N. S. (2001) "Dimyristoylated Peptides Incorporated into Lipsomes Are Polyvalent Fertilinb Mimics," Org. Lett. 3, 3333-333. DOI:

Sampson, N. S. (2001) "The Emerging Global Paradigm for Scientific Research," in New Voices in Chemistry, Chem. Eng. News, 26 Mar 2001, p. 187. DOI:

Ye, Y.; Lario, P. Vrielink, A.; Sampson, N. S. (2001) "Structural and Kinetic Analysis of the Role of Asn485 in the Reaction Catalyzed by Cholesterol Oxidase," Biochemistry, 40, 13779-13787. DOI:

Sampson, N.S.; Mrksich, M.; Bertozzi, C.R. (2001) "Surface Molecular Recognition," Proc. Nat. Acad. Sci. U.S.A. 98, 12870-12871. DOI:

Sampson, N. S.; Sarah T. Ryan; Deborah A. Enke; Dominic Cosgrove; Victor Koteliansky; Philip Gotwals (2001) "Global Gene Expression Analysis Reveals a Role for the a1Integrin in Renal Pathogenesis," J. Biol. Chem, 276 34182-34188. DOI:

Xiang, J; Sun, J.; Sampson, N. S. (2001) "The Importance of Hinge Sequence for Loop Function and Catalytic Activity in the Reaction Catalyzed by Triosephosphate Isomerase," J. Mol. Biol, 307, 1103-1112. DOI:

Sampson, N. S. (2001) "Dissection of a Flavo-Enzyme Active Site: the Reaction Catalyzed by Cholesterol Oxidase," Antioxidants and Redox Signalling, 3, 839-846. DOI:

Chen, X.; Wolfgang, D.; Sampson, N. S., (2000) "Use of the Parallax-Quench Method to Determine the Position of the Active-Site Loop of Cholesterol Oxidase in Lipid Bilayers," Biochemistry, 39, 13383-13389. DOI:

McCann, A.; Sampson, N. S., (2000) "A C6-FAD Adduct is Formed Upon Irreversible Inactivation of Cholesterol Oxidase by 2a,3a-Cyclopropano-5a-cholestan-3b-ol," J. Am.Chem. Soc., 122, 35-39. DOI:

Gupta, S.; Li, H.; Sampson, N. S., (2000) "Characterization of Fertilinb-Disintegrin Binding Specificity in Sperm-Egg Adhesion," Bioorg. Med. Chem., 8, 723-729. DOI:

Sun, J.; Sampson, N. S., (1999) "Understanding Protein Lids: Kinetic Analysis of Active Hinge Mutants in Triosephosphate Isomerase,"Biochemistry, 38, 11474-11481. DOI:

Yue, Q. K.; Kass, I. J.; Sampson, N. S.; Vrielink, A., (1999) "Crystal Structure Determination of Cholesterol Oxidase from Streptomycesand Structural Characterization of Key Active Site Mutants," Biochemistry, 38, 4277-4286. DOI:

Chen, H.; Sampson, N.S., (1999) "Mediation of Mammalian Sperm-Egg Fusion: Evidence That Mouse Egg a6b1 Integrin is the Receptor for Sperm Fertilinb," Chem. Biol., 6, 1-10. DOI:

Kass, I. J.; Sampson, N. S., (1998) "Evaluation of the Role of His447 in the Reaction Catalyzed by Cholesterol Oxidase,"Biochemistry, 37, 17990-18000. DOI:

Chen, H.; Pyluck, A.; Janik, M.; Sampson, N. S., (1998) "Peptides Corresponding to the Epidermal Growth Factor-like Domain of Mouse Fertilin: Synthesis and Biological Activity," Biopolymers (Peptide Science), 47, 299-307. DOI:

Kass, I. J.; Sampson, N. S., (1998) "The Importance of Glu361 Position in the Reaction Catalyzed by Cholesterol Oxidase," Bioorg. Med. Chem. Lett., 8, 2663-2668. DOI:

Sun, J.; Sampson, N. S., (1998) "Determination of the Amino Acid Requirements for a Protein Hinge in Triosephosphate Isomerase,"Prot. Science, 7, 1495-1505. DOI:

Sampson, N. S.; Kass, I. J.; Ghoshroy, K. B., (1998) "A Truncated W Loop Mutant of Cholesterol Oxidase Has Altered Substrate Specificity," Biochemistry, 37, 5770-5778. DOI:

Sampson, N. S.; Chen, X., (1998) "Improved Expression of Brevibacterium sterolicum Cholesterol Oxidase in Escherichia coli by Genetic Modification," Prot. Exp. Purific., 12, 347-352. DOI:

Sampson, N. S.; McCann, A. E., (1997) "4,5-Cyclopropano-Cholestan-3b-Ol Substrates for Cholesterol Oxidase and Their 1H NMR Assignments, " J. Org. Chem., 62, 5893 -5897. DOI:

Pyluck, A.; Ruiyong, Y.; Galligan Jr, E.; Primakoff, P.; Myles, D. G.; Sampson, N. S., (1997) "ECD Peptides Inhibit In Vitro Fertilization in Mice," Bioorg. Med. Chem. Lett., 7, 1053-1058. DOI:

Ghoshroy, K. B.; Zhu, W.; Sampson, N. S., (1997) "Investigation of Membrane Disruption in the Reaction Catalyzed by Cholesterol Oxidase," Biochemistry, 36, 6133-6140. DOI:

Sampson, N. S.; Kass, I. J., (1997) "Isomerization but not Oxidation is Suppressed by a Single Point Mutation, E361Q, in the Reaction Catalyzed by Cholesterol Oxidase," J. Am. Chem. Soc., 119, 855-862. DOI:

Kass, I. J.; Sampson, N. S., (1995) "The Isomerization Catalyzed by Brevibacterium sterolicum Cholesterol Oxidase Proceeds Stereospecifically with One Base," Biochem. Biophys. Res. Commun., 206, 688-693. DOI:

Sampson, N. S.; Knowles, J. R., (1992) "Segmental Motion in Catalysis: Investigation of a Critical Hydrogen Bond for Loop Closure in the Reaction of Triosephosphate Isomerase," Biochemistry, 31, 8488-8494. DOI:

Sampson, N. S.; Knowles, J. R., (1992) "Segmental Movement: Definition of the Structural Requirements for Loop Closure in Catalysis by Triosephosphate Isomerase," Biochemistry, 31, 8482-8487. DOI:

Sampson, N. S.; Bartlett, P. A., (1991) "Attempted de Novo Design, Synthesis, and Evaluation of a Ligand for the Allosteric Site of Phosphofructokinase," J. Org. Chem. 56, 7179-7183. DOI:

Bone, R.; Sampson, N. S.; Bartlett, P. A.; Agard, D. A., (1991) "Crystal Structures of a-Lytic Protease Complexes with Irreversibly Bound Phosphonate Esters," Biochemistry 30, 2263-2272. DOI:

Sampson, N. S.; Bartlett, P. A., (1991) "Peptidic Phosphonylating Agents as Irreversible Inhibitors of Serine Proteases and Models of the Tetrahedral Intermediates," Biochemistry 30, 2255-2263. DOI:

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