My research is concerned with the mechanism of energy-conversion and storage reactions in photosynthetic systems. The principle approach is to study excitation energy transfer and electron transfer processes using various ultrafast laser spectroscopy techniques. Insight can be gained into the mechanisms of the antenna and reaction center functions; and the knowledge can be applied to the design of molecular devices.

One of the systems studied, in collaboration with Neal Woodbury’s group, is the purple bacteria reaction center, a membrane bound pigment-protein complex which uses light energy to drive an electron across the photosynthetic membrane through a series of ultrafast chemical reactions. This solar energy to electrochemical energy conversion occurs on a picosecond time scale and has efficiency close to 100%.

Another research project, collaborating with Robert Blankenship, Andrew Webber, Wim Vermaas, and Petra Fromme is to understand the excitation energy transfer and charge separation processes in photosystem I and photosystem II from green bacteria and green algae. In those systems, large antenna arrays consisting up to 100 – 200 chlorophylls (or bacterochlorophylls) collect light and deliver the excitation energy to the reaction center, where electron transfer reactions take place, converting solar energy into chemical energy.

The collaboration work with Devens Gust, Thomas Moore and Ana Moore is on the subject of understanding energy and electron transfer in chemically synthesized compounds with mimic the functions of photosynthetic systems to utilize light energy in driving electron transfer reactions.

Contact Information:		Chemistry and Biochemistry	AZBio Design Institute
	Phones:	office: (480) 965-0675 lab: (480) 965-9670	office:(480) 727-0391 lab: (480) 727-0124
	Fax:	(480) 965-1963	Fax: (480) 727-0396
	Room:	office: PSB237 lab: PSB348	office: AZB30E lab: AL1-09
	Email:	SLIN@ASU.EDU

 

Selected Publications

Controlling the Pathway of Photosynthetic Charge Separation in Bacterial Reaction Centers A. L. M. Haffa, S. Lin, J. C. Williams, B. P. Bowen, A. K. W. Taguchi, J. P. Allen, and N. W. Woodbury, J. Phys. Chem. B, 108:4-7 (2004) http://pubs.acs.org/cgi-bin/sample.cgi/jpcbfk/2004/108/i01/abs/jp035904w.html

Exciton Theory S. Lin, Encyclopedia of Plant and Crop Sciences pp 429-432 R.M. Goodman Ed., Marcel Dekker Inc. New York, NY (2004)

Carotenoid and Bacteriochlorophyll Energy Transfer in the B808-866 Complex from Chloroflexus aurantiacus G. A. Montano, Y. Xin, S. Lin, R. E. Blankenship, J. Phys. Chem. B, 108:10607 –10611 (2004) http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2004/108/i29/abs/jp047988u.html

Energy Coupling in the PSI-LHCI Supercomplex from the Green Alga Chlamydomonas reinhardtii A. N. Melkozernov, J. Kargul, S. Lin, J. Barber, R. E. Blankenship, J. Phys. Chem. B, 108:10547 –10555 (2004) http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2004/108/i29/abs/jp049375n.html

Bi-Directional Electron Transfer in Photosystem I: Accumulation of A₀^- in A-Side or B-Side Mutants of the Axial Ligand to Chlorophyll A₀ VM Ramesh, Krysztof Gibasiewicz, Su Lin, Scott E Bingham and Andrew N. Webber,  Biochemistry, 43:1369 –1375 (2004) http://pubs.acs.org/cgi-bin/abstract.cgi/bichaw/2004/43/i05/abs/bi0354177.html

Spectroscopic properties of the main-form and high-salt peridinin-chlorophyll a-proteins from Amphidinium carterae R.P. Ilagan, S. Shima, A. Melkozernov, S. Lin, R.E. Blankship, F.P. Sharples, R.G. Hiller, R.R. Birge, and H.A. Frank Biochemistry 43:1478-1487 (2004) http://pubs.acs.org/cgi-bin/abstract.cgi/bichaw/2004/43/i06/abs/bi0357964.html

Photolysis and Recombination of Adenosylcobalamin Bound to Glutamate Mutase Roseanne J. Sension, Allwyn G. Cole, Ahmasi D. Harris, Christel C. Fox, Neal Woodbury, Su Lin, E. Neil G. Marsh, J. Am. Chem. Soc. 126:1598-1599 (2004) http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/2004/126/i06/abs/ja0396910.html

Electron Transfer Dynamics in Rhodobacter Sphaeroides Reaction Center Mutants with a Modified Ligand for the Monomer Bacteriochlorophyll on the Active Side E. Katilius, J. L. Bever, S. Lin, N. W. Woodbury, Photosynthesis Research, 86:165-180 (2004) http://www.kluweronline.com/issn/0166-8595

Excitation Dynamics in the Core Antenna in the Photosystem I Reaction Center of the Chlorophyll d Containing Photosynthetic Prokaryote Acaryochloris marina D. Mi, M. Chen, S. Lin, M. Lince, A.W.D. Larkum, and R.E. Blankenship J. Phys. Chem B 107:1452-1457 (2003) http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2003/107/i06/abs/jp0268260.html

Energy and electron transfer in photosystem II of a chlorophyll b-containing Synechocystis sp. PCC 6803 mutant D. Vavilin, H. Xu, S. Lin, and W. Vermaas, Biochemistry 42:1731-1746 (2003) http://pubs.acs.org/cgi-bin/abstract.cgi/bichaw/2003/42/i06/abs/bi026853g.html

Time-Resolved Absorption and Emission Show that the CP43' Antenna Ring of Iron-Stressed Synechocystis sp. PCC6803 Is Efficiently Coupled to the Photosystem I Reaction Center Core A.N. Melkozernov, T.S. Bibby, S. Lin, J. Barber, R.E. Blankenship Biochemistry; 42: 3893-3903 (2003) http://pubs.acs.org/cgi-bin/abstract.cgi/bichaw/2003/42/i13/abs/bi026987u.html

Excitonic interactions in wild type and mutant PSI reaction centers K. Gibasiewicz, V.M. Ramesh, S. Lin, K. Redding, N.W. Woodbury, and A.N. Webber, Biophys. J, 85:2547-2559 (2003)  http://www.biophysj.org/cgi/content/abstract/85/4/2547?etoc

Manipulations of the B-side sharge-separated states energetics in the Rhodobacter sphaeroides reaction center  E. Katilius, J.L. Bever, Z. Katiliene, S. Lin, A.K.W. Taguchi and N.W. Woodbury, J. Phys. Chem B 107:12029 – 12034 (2003) http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2003/107/i43/abs/jp035013o.html

High Yield of Long-Lived B-Side Charge Separation at Room Temperature in Mutant Bacterial Reaction Centers A. L. M. Haffa, S. Lin, J. C. Williams, A. K. W. Taguchi, J. P. Allen,  N. W. Woodbury J. Phys. Chem. B, 107:12503 -12510 (2003)  http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2003/107/i45/abs/jp034703p.html

Isolation and characterization of the B798 baseplate light-harvesting complex from the chlorosomes of Chloroflexus aurantiacus G.A. Montaño, H-M Wu, S. Lin, D.C. Brune, and R.E. Blankenship Biochemistry 42:10246-10251 (2003) http://pubs.acs.org/cgi-bin/article.cgi/bichaw/2003/42/i34/pdf/bi034350k.pdf

Excitation energy transfer from carotenoid to bacteriochlorophyll in the photosynthetic purple bacterial reaction center of Rhodobacter sphaeroides S. Lin, E. Katilius, A.K.W. Taguchi and N.W. Woodbury J. Phys. Chem. B, 107 (50), 14103 –14108 (2003) http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2003/107/i50/abs/jp036130m.html

B-Side Electron Transfer in a Rhodobacter sphaeroides Reaction Center Mutant in which the B-side Monomer Bacteriochlorophyll is Replaced with Bacteriopheophytin: Low temperature study and energetics of charge separated states E. Katilius, Z. Katiliene, S. Lin, A. Taguchi and N. Woodbury, J. Phys. Chem. 106:1471-1475 (2002) http://pubs.acs.org:80/journals/jpcbfk/abstract.cgi/jpcbfk/2002/106/i06/abs/jp013265o.html

Dynamics of photoinduced electron transfer in an amphiphilic A²⁺-S-D triad molecule M. Sakomura, S. Lin, T.A. Moore, A.L. Moore, D. Gust, and M. Fujihira, J. Phys. Chem. 106:2218-2226 (2002) http://pubs.acs.org:80/journals/jpcafh/abstract.cgi/jpcafh/2002/106/i10/abs/jp012566v.html

Excitation energy transfer in the Lhca1 subunit of LHC I-730 peripheral antenna of Photosystem I A.N. Melkozernov, V.H.R. Schmid, S. Lin, H. Paulsen, and R.E. Blankenship, J. Phys. Chem. 106: 4313-4317 (2002) http://pubs.acs.org:80/journals/jpcbfk/abstract.cgi/jpcbfk/2002/106/i16/abs/jp014271n.html

The gold porphyrin first excited singlet state J. Andreasson, G. Kodis, S. Lin, A.L. Moore, T.A. Moore, D. Gust, J. Martensson, and B. Albinsson; Photochem. Photobiol. 76:47-50 (2002) http://www.bioone.org/bioone/?request=get-abstract&issn=0031-8655&volume=076&issue=01&page=0047

The dependence of the initial electron transfer rate on driving force in Rhodobacter sphaeroides reaction centers, A.L.M. Haffa, S. Lin, E. Katilius, J.C. Williams, A.K.W. Taguchi, J.P. Allen, N.W. Woodbury, J. Phys. Chem. 106:7376-7384 (2002) http://pubs.acs.org:80/journals/jpcbfk/abstract.cgi/jpcbfk/2002/106/i29/abs/jp0257552.html

Excitation dynamics in eukaryotic PS I from Chlamydomonas reinhardtii CC 2696 at 10 K. Direct detection of the reaction center exciton states K. Gibasiewicz, V.M. Ramesh, S. Lin, N.W. Woodbury, and A.N. Webber J. Phys. Chem. B, 106: 6322 -6330 (2002) http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/2002/106/i24/abs/jp014608l.html

B-Side Electron Transfer in the HE(M182) Reaction Center Mutant from Rhodobacter sphaeroides E. Katilius, Z. Katiliene, S. Lin, A.K.W. Taguchi, and N.W. Woodbury J. Phys. Chem. B, 106: 12344 –12350 (2002) http://pubs.acs.org/journals/jpcbfk/abstract.cgi/jpcbfk/2002/106/i47/abs/jp026388x.html

Spectral inhomogeneity of Photosystem I and its influence on excitation equilibration and trapping in Synechocystis sp. PCC6803 at 77 K A. N. Melkozernov, S. Lin, R. E. Blankenship, and L. Valkunas, J. Biophysics, 81: 1144-1154 (2001).  http://www.biophysj.org/cgi/content/abstract/81/2/1144

Photoswitch singlet energy transfer in a porphyrin-spiropyran dyad J. L. Bahr, G. Kodis, L. de la Garza, S. Lin, A. L. Moore, T. A. Moore, and D. Gust; JACS 123(29); 7124-7133 (2001) http://pubs.acs.org/isubscribe/journals/alljournals/jtext.cgi?jacsat/123/29/abs/ja010058t.html

Early photocycle kinetic behavior of the E46A and Y42F mutants of photoactive yellow protein: femtosecond spectroscopy S. Devanathan, S. Lin, M. Cusanovich, N. Woodbury , and G. Tollin, Biophysical Journal 81: 2314-2319 (2001).  http://www.biophysj.org/cgi/content/abstract/81/4/2314

Excitation dynamics in the core antenna of PS I from Chlamydomonas reinhardtii CC 2696 at room temperature K. Gibasiewicz, V. M. Ramesh, A. N. Melkozernov, S. Lin, N. W. Woodbury, R.E. Blankenship, and A.N. Webber, J. Phys. Chem B, 105(46); 11498-11506 (2001). http://pubs.acs.org/isubscribe/journals/alljournals/jtext.cgi?jpcbfk/105/46/abs/jp012089g.html

Blue light drives B-side electron transfer in bacterial photosynthetic reaction centers S. Lin, E. Katilius, A. L. M. Haffa, A.K.W. Taguchi, and N.W. Woodbury ; Biochemistry; 2001; 40(46); 13767-13773 (2001). http://pubs.acs.org/isubscribe/journals/alljournals/jtext.cgi?bichaw/40/46/abs/bi015612q.html

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