John Sumida, Ph.D.
Research Associate

Education
Arizona State University

Lab
Sam Lehrer

Research Interests
actin – tropomyosin - spectroscopy - protein-protein interactions - energy transfer - fluorescence anisotropy

Currently investigating the actin-tropomyosin dynamics in terms of a three state system: open, closed and blocked.  We are interested in knowing the number of accessible actin sites associated with a myosin induced shift of tropomyosin along the actin filament.  Additionally we would like to know what role troponin plays during this process; spefically where it is located on tropomyosin.

Recent Publications:
Maniga, NI, Sumida JP, Stone S, Moore AL, Moore TA, Gust D. (1999) Increasing the yield of photoinduced charge separation through parallel electron transfer pathways. J Porphyrins Phthalocyanines. 3:32-44.

Sumida JP, Liddell PA, MacphersonAN, Seely GR, Moore AL, Moore TA and Gust D. (1998) Contrasting photoinduced electron transfer properties of two closely related rigidly-linked porphyrin-quinone dyads. J Phys Chem. A102:5512-5519.

Gust D, Moore TA, Moore AL, Liddell PA, Kuciauskas D, Sumida JP, Nash B and Nguyen D. (1997) A carotene-porphyrin-fullerene triad: photoinduced charge separation and charge recombination to a triplet state. In Kadish KM and Ruoff RS, eds, Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials, Vol. 4, The Electrochemical Society, Pennington, NJ, pp. 9-24.

Liddell PA, Kuciauskas D, Sumida JP, Nash B, Nguyen D, Moore AL, Moore TA and Gust D. (1997) Photoinduced charge separation and charge recombination to a triplet state in a carotene-porphyrin-fullerene triad. J Am Chem Soc. 119:1400-1405.

DeGraziano JM, Macpherson AN, Liddell PA, Noss L, Sumida JP, Seely GR, Lewis JE, Moore AL, Moore TA and Gust D. (1996) Solvent dependence of photoinduced electron transfer in porphyrin dyads. New J Chem. 20:839-851.

Contact Info
email: sumida@bbri.org, tel. 617-658-7852