Abstract

Recent work has revealed the existence of a novel class of Zn enzymes, in which the Zn appears to function to activate a coordinated thiolate toward nucleophilic attack. X-ray absorption spectroscopy is Hbeing used to study three such enzymes that are involved in various Haspects of methyl transfer: cobalamin-dependent and cobalamin-independent methionine synthase and cobamide: coenzyme M methyl transferase. EXAFS measurements on the native enzyme, on site directed mutants, and on enzyme samples with a variety of substrates and substrate analogs are in progress, with the goal of elucidating the three dimensional geometry of the Zn active sites.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001633-20
Application #
6618392
Study Section
Project Start
2002-09-01
Project End
2003-08-31
Budget Start
Budget End
Support Year
20
Fiscal Year
2002
Total Cost
Indirect Cost

  Institution

Name
Albert Einstein College of Medicine
Department
Type
DUNS #
009095365
City
Bronx
State
NY
Country
United States
Zip Code
10461

  Publications

Vongsvivut, Jitraporn; Fernandez, Jason; Ekgasit, Sanong et al. (2004) Characterization of supported cylinder-planar germanium waveguide sensors with synchrotron infrared radiation. Appl Spectrosc 58:143-51
Masip, Lluis; Pan, Jonathan L; Haldar, Suranjana et al. (2004) An engineered pathway for the formation of protein disulfide bonds. Science 303:1185-9
Huang, Raymond Y; Miller, Lisa M; Carlson, Cathy S et al. (2003) In situ chemistry of osteoporosis revealed by synchrotron infrared microspectroscopy. Bone 33:514-21
Rashidzadeh, Hassan; Khrapunov, Sergei; Chance, Mark R et al. (2003) Solution structure and interdomain interactions of the Saccharomyces cerevisiae ""TATA binding protein"" (TBP) probed by radiolytic protein footprinting. Biochemistry 42:3655-65
Uchida, Takeshi; Takamoto, Keiji; He, Qin et al. (2003) Multiple monovalent ion-dependent pathways for the folding of the L-21 Tetrahymena thermophila ribozyme. J Mol Biol 328:463-78
Taylor, Colleen M; Watton, Stephen P; Bryngelson, Peter A et al. (2003) Inner-sphere complexation of cobalt(II) 2,9-dimethyl-1,10-phenanthroline ([Co(neo)]2+) with commercial and sol-gel derived silica gel surfaces. Inorg Chem 42:312-20
Dewan, John C; Feeling-Taylor, Angela; Puius, Yoram A et al. (2002) Structure of mutant human carbonmonoxyhemoglobin C (betaE6K) at 2.0 A resolution. Acta Crystallogr D Biol Crystallogr 58:2038-42
Kiselar, J G; Maleknia, S D; Sullivan, M et al. (2002) Hydroxyl radical probe of protein surfaces using synchrotron X-ray radiolysis and mass spectrometry. Int J Radiat Biol 78:101-14
Swisher, Jennifer F; Su, Linhui J; Brenowitz, Michael et al. (2002) Productive folding to the native state by a group II intron ribozyme. J Mol Biol 315:297-310
Dhavan, Gauri M; Crothers, Donald M; Chance, Mark R et al. (2002) Concerted binding and bending of DNA by Escherichia coli integration host factor. J Mol Biol 315:1027-37

Showing the most recent 10 out of 68 publications