Address Staff Main Research Topics Collaborations Selected Publications

 

Department of Photosynthetic Membranes

Institute of Biophysics, Bulgarian Academy of Sciences

"Acad. G. Bonchev" Str. Bl. 21

Sofia 1113, Bulgaria

 

 

Staff of the Department "Photosynthetic membranes"

working on Application of Electro-optics in Investigation of Biological Membranes

 

Stefka G. Taneva, Associate Professor, Ph.D.

Phone: 359 2 979 36 43

FAX: 359 2 971 24 93

E-mail: sgtaneva@obzor.bio21.bas.bg

 

A. Dobrukova, Ph.D.

Phone: 359 2 979 26 03

FAX: 359 2 971 24 93

E-mail: aneli@obzor.bio21.bas.bg

 

N. Tuparev, Ph.D.

Phone: 359 2 979 36 43

FAX: 359 2 971 24 93

E-mail: niki@obzor.bio21.bas.bg

 

Main research topics:

A number of photochemical and photophysical processes in photosynthetic membranes: like proton and electron transfer, membrane conformational changes as well as membrane adhesion and structural organization of photosynthetic membranes are controlled by membrane electric and interfacial charges.

Biophysics of photosynthesis and retinal proteins.

Biophysics of photosynthesis and retinal proteins

Static and dynamic electric properties of biological membranes.

Static and dynamic electric properties of biological membranes

 

PURPLE MEMBRANES

from Halobacterium salinarium

Modified purple membranes

Bacteriorhodopsin mutants

 

PHOTOSYNTHETIC APPARATUS OF HIGHER PLANTS

thylakoid membranes

photosystem I- and photosystem II- enriched fragments

macroaggregates of light-harvesting protein-pigment complex of photosystem II, LHC II

 

 

Molecular mechanism of light-induced energy transduction, charge transfer and protein conformational changes, static and dynamic surface electric properties, electric double bilayer and membrane charge asymmetry, lipid-protein and chromophore-protein interactions, protein conformation and stability.

Structural organisation and electric properties of the main pigment-protein complexes; relation of electric parameters to the efficiency of light energy transduction processes in higher plants and plant mutants; conformation and stability of light-harvesting complex macroaggregates.

 

Collaborations:

 

Institute of Physical Chemistry
Bulgarian Academy of Sciences
Sofia 1113, Bulgaria

Institute of Biophysics
Biological Research Center
Hungarian Academy of Sciences
Szeged H-6701, Hungary

Unidad de Biofisica (CSIC-UPV/EHU)
Departamento de Bioquimica
Universidad del Pais Vasco, Aptdo. 644
48040 Bilbao, Spain


Selected Publications:

Colloids and Surfaces 52 (1991) 257-267. Influence of surface active substances on the electric surface properties of purple membrane fragments, I.B. Petkanchin, S.G. Taneva and G. Todorov.

J. Photochem. Photobiol.B: 10 (1991) 315-327. Electrooptic study of chloroplast membranes and PS II particles, S.G. Taneva, M. Busheva and I.B. Petkanchin.

PHOTOBIOLOGY: The Science and Its Applications (1991) pp.277-286. Electric parameters of purple membrane fragments, S.G. Taneva and I.B. Petkanchin.

Adv. Coll. Int. Sci. 38 (1992) 299-319. Influence of cation binding on the electro-optically determined electric moments of purple membranes, S.G. Taneva, I.B. Petkanchin, G. Todorov and S.P. Stoylov.

Bioelectrochem. Bioenerg. 27 (1992) 63-71. Effect of surface active substances on the surface charge density of purple membrane fragments, S.G. Taneva.

Colloid and Molecular Electro-optics (1992) IOP Publishing Ltd. (Eds. B.R. Jennings and S.P. Stoylov), Institute of Physics Publishing, Bristol and Philadelphia. Electro-optics: applications to biological membranes, S.G. Taneva and I.B. Petkanchin.

Biophys. Chemistry 44 (1992) 91-99. Electro-optical investigation of lipid-depleted purple membranes, S.G. Taneva, N. Jordanova and I.B. Petkanchin.

Bioelectrochem. Bioenerg. 28 (1992) 451-459. Electric light scattering study of apomembranes, S.G. Taneva, T.R. Lazarova and I.B. Petkanchin.

J. Photochem. Photobiol. B: 23 (1994) 19-25. Electro-optical investigation of thylakoids and PS II fragments treated with trypsin, S.G. Taneva, Busheva M.Ch., A. Dobrikova and I. Petkanchin.

Biochim. Biophys. Acta 1236 (1995) 331-337. Electrokinetic charge of anesthetic-induced bR480 and bR380 spectral forms of bacteriorhodopsin, S.G. Taneva, J.M.M. Caaveiro, I.B. Petkanchin and F.M. Gońi.

Bioelectrochem. Bioenerg. 38 (1995) 111-115. Partial delipidation of purple membranes by Tween 20. Changes in surface electric properties, S.G. Taneva, A. Dobrikova, I.B. Petkanchin and F.M. Gońi.

J. Photochem. Photobiol. B: 39 (1997) 30-35. Electric dipole moments of PS I-enriched membrane fragments. A. Dobrikova, S. G. Taneva, M. Busheva and I. B. Petkanchin.

Biophys. Chem. 67 (1997) 239-244. Surface electric properties of thylakoid membranes from Arabidopsis thaliana mutants. A. Dobrikova, S.G. Taneva, M. Busheva, E. Apostolova and I. B. Petkanchin.

Colloids and surfaces A: Physicochemical and Engineering Aspects, 148 (1999) 113-119, Effect of single-site mutation at Asp38 of bacteriorhodopsin on the electric dipole moments of purple membranes. Tuparev N., Taneva S.G., Lazarova Tz., Padros E., Tóth-Boconádi R. and I. Petkanchin.

Photosynthesis: Mechanisms and Effects, Vol. I (1998) 321-324, (Ed. G. Garab), Kluwer Academic Publishers, Dordrecht, Boston, London,. Electro-optical investighation of LHC II macroaggregates. A. Dobrikova, S.G. Taneva, I. Simidjiev, G. Garab and I. Petkanchin

J. Photochem. Photobiol. B: 57 (2000) 33-40, Contribution of LHC II complex to the electric properties of thylakoid membranes: an electric light scattering study of Chl b-less barley mutant, A. Dobrikova, Morgan, Ivanov A., Petkanchin I., Taneva S.G.

Photosynth. Research 65 (2000) 165-174, Electric properties of thylakoid membranes from pea mutants with modified carotenoid and chlorophyll-protein complexes composition, Dobrikova A., Morgan, Ivanov A., Apostolova E., Petkanchin I., Huner, Taneva S.G.

Colloids and surfaces B: Biosurfaces 20 (2001) 145-153, Buffer-induced changes of purple membrane surface electric properties: an electro-optical study, N. Tuparev, I. Petkanchin and S.G. Taneva.