Abstract

The STEM is being used for mass measurement and the possible localization of specific groups by Au-labeling (carbohydrate or SH groups) in the study of the molluscan hemocyanins (Hc). The simplest of these decameric cylindrical macromolecules is ten times the size of the arthropodan hexameric Hc. The Hcs of marine gastropods consist of multiple decameric cylinders assembled into. di-decamers, and of particular interesi, td-decamers and higher arrays. Many other hemocyanins have been compared to try to discover wbat determines the preferred number of decamers for a particular organism. Several different methods of punP gigantea ying the hemocyamn, from P. were examined in the STEM for their quality. The hope is to be able to perform SAS experiments on them, similar to those described for CIpP (see Flanagan). - Carbonic anhydrase, is the enzyme used by oyster in shell formation. This has been purified and shown to be composed of 35kD subunits. Unlike the vertebrate complex which functions as a 30kD monomer, the snail enzyme is a complex of roughly 2MD. STEM mass measurements are being used to determine the number and spatial arrangement of subunits. Acety1cholinesterases from gastropods are also planned to be examined in the STEM.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001777-16
Application #
6281344
Study Section
Project Start
1998-04-01
Project End
1999-03-31
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
16
Fiscal Year
1998
Total Cost
Indirect Cost

  Institution

Name
Brookhaven National Laboratory
Department
Type
DUNS #
027579460
City
Upton
State
NY
Country
United States
Zip Code
11973

  Publications

Hind, Geoffrey; Wall, Joseph S; Várkonyi, Zsuzsanna et al. (2014) Membrane crystals of plant light-harvesting complex II disassemble reversibly in light. Plant Cell Physiol 55:1296-303
Garofalo, Robert; Mustanski, Brian; Johnson, Amy et al. (2010) Exploring factors that underlie racial/ethnic disparities in HIV risk among young men who have sex with men. J Urban Health 87:318-323
Joshi, V N; Mitra, D; England, M D et al. (2010) Large Covalently Linked Fluorescent and Gold Nanoparticle Immunoprobes. Microsc Microanal 16:966-967
Ackerson, Christopher J; Powell, Richard D; Hainfeld, James F (2010) Site-specific biomolecule labeling with gold clusters. Methods Enzymol 481:195-230
Hu, Minghui; Qian, Luping; Brinas, Raymond P et al. (2008) Gold nanoparticle-protein arrays improve resolution for cryo-electron microscopy. J Struct Biol 161:83-91
Garofalo, Robert; Mustanski, Brian; Donenberg, Geri (2008) Parents know and parents matter;is it time to develop family-based HIV prevention programs for young men who have sex with men? J Adolesc Health 43:201-4
Brinas, Raymond P; Hu, Minghui; Qian, Luping et al. (2008) Gold nanoparticle size controlled by polymeric Au(I) thiolate precursor size. J Am Chem Soc 130:975-82
Hu, Minghui; Zhang, Yian-Biao; Qian, Luping et al. (2008) Three-dimensional structure of human chromatin accessibility complex hCHRAC by electron microscopy. J Struct Biol 164:263-9
Garofalo, Robert; Mustanski, Brian S; McKirnan, David J et al. (2007) Methamphetamine and young men who have sex with men: understanding patterns and correlates of use and the association with HIV-related sexual risk. Arch Pediatr Adolesc Med 161:591-6
Mustanski, Brian; Garofalo, Robert; Herrick, Amy et al. (2007) Psychosocial health problems increase risk for HIV among urban young men who have sex with men: preliminary evidence of a syndemic in need of attention. Ann Behav Med 34:37-45

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