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Cherepanov DA, Milanovsky GE, Neverov KV, Obukhov YN, Maleeva YV, Aybush AV, Kritsky MS, Nadtochenko VA. Exciton interactions of chlorophyll tetramer in water-soluble chlorophyll-binding protein BoWSCP. Spectrochim Acta A Mol Biomol Spectrosc 2024; 309:123847. [PMID: 38217986 DOI: 10.1016/j.saa.2024.123847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 01/15/2024]
Abstract
The exciton interaction of four chlorophyll a (Chl a) molecules in a symmetrical tetrameric complex of the water-soluble chlorophyll-binding protein BoWSCP was analyzed in the pH range of 3-11. Exciton splitting ΔE = 232 ± 2 cm-1 of the Qy band of Chl a into two subcomponents with relative intensities of 78.1 ± 0.7 % and 21.9 ± 0.7 % was determined by a joint decomposition of the absorption and circular dichroism spectra into Gaussian functions. The exciton coupling parameters were calculated based on the BoWSCP atomic structure in three approximations: the point dipole model, the distributed atomic monopoles, and direct ab initio calculations in the TDDFT/PCM approximation. The Coulomb interactions of monomers were calculated within the continuum model using three values of optical permittivity. The models based on the properties of free Chl a in solution suffer from significant errors both in estimating the absolute value of the exciton interaction and in the relative intensity of exciton transitions. Calculations within the TDDFT/PCM approximation reproduce the experimentally determined parameters of the exciton splitting and the relative intensities of the exciton bands. The following factors of pigment-protein and pigment-pigment interactions were examined: deviation of the macrocycle geometry from the planar conformation of free Chl; the formation of hydrogen bonds between the macrocycle and water molecules; the overlap of wave functions of monomers at close distances. The most significant factor is the geometrical deformation of the porphyrin macrocycle, which leads to an increase in the dipole moment of Chl monomer from 5.5 to 6.9 D and to a rotation of the dipole moment by 15° towards the cyclopentane ring. The contributions of resonant charge-transfer states to the wave functions of the Chl dimer were determined and the transition dipole moments of the symmetric and antisymmetric charge-transfer states were estimated.
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Affiliation(s)
- D A Cherepanov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Kosygina str., 4, Russian Federation; A.N. Belozersky Institute Of Physico-Chemical Biology, Moscow State University, 119992 Moscow, Leninskye gory, 1b.40, Russian Federation.
| | - G E Milanovsky
- A.N. Belozersky Institute Of Physico-Chemical Biology, Moscow State University, 119992 Moscow, Leninskye gory, 1b.40, Russian Federation
| | - K V Neverov
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences", 119071 Moscow, Leninsky prospect, 33b.2, Russian Federation; Faculty of Biology, Moscow State University, 119234 Moscow, Leninskye gory, 1b.12, Russian Federation
| | - Yu N Obukhov
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences", 119071 Moscow, Leninsky prospect, 33b.2, Russian Federation
| | - Yu V Maleeva
- Faculty of Biology, Moscow State University, 119234 Moscow, Leninskye gory, 1b.12, Russian Federation
| | - A V Aybush
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Kosygina str., 4, Russian Federation
| | - M S Kritsky
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences", 119071 Moscow, Leninsky prospect, 33b.2, Russian Federation
| | - V A Nadtochenko
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Kosygina str., 4, Russian Federation; Department of Chemistry, Moscow State University, 119991 Moscow, Leninskye gory, 1b.3, Russian Federation
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Telegina TA, Vechtomova YL, Aybush AV, Buglak AA, Kritsky MS. Isomerization of carotenoids in photosynthesis and metabolic adaptation. Biophys Rev 2023; 15:887-906. [PMID: 37974987 PMCID: PMC10643480 DOI: 10.1007/s12551-023-01156-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 09/22/2023] [Indexed: 11/19/2023] Open
Abstract
In nature, carotenoids are present as trans- and cis-isomers. Various physical and chemical factors like light, heat, acids, catalytic agents, and photosensitizers can contribute to the isomerization of carotenoids. Living organisms in the process of evolution have developed different mechanisms of adaptation to light stress, which can also involve isomeric forms of carotenoids. Particularly, light stress conditions can enhance isomerization processes. The purpose of this work is to review the recent studies on cis/trans isomerization of carotenoids as well as the role of carotenoid isomers for the light capture, energy transfer, photoprotection in light-harvesting complexes, and reaction centers of the photosynthetic apparatus of plants and other photosynthetic organisms. The review also presents recent studies of carotenoid isomers for the biomedical aspects, showing cis- and trans-isomers differ in bioavailability, antioxidant activity and biological activity, which can be used for therapeutic and prophylactic purposes.
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Affiliation(s)
- T. A. Telegina
- Research Center of Biotechnology of the Russian Academy of Sciences, 33 Leninsky Prospect, Building 2, 119071 Moscow, Russia
| | - Yuliya L. Vechtomova
- Research Center of Biotechnology of the Russian Academy of Sciences, 33 Leninsky Prospect, Building 2, 119071 Moscow, Russia
| | - A. V. Aybush
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 4 Kosygina Street, Building 1, 119991 Moscow, Russia
| | - A. A. Buglak
- Saint Petersburg State University, 7-9 Universitetskaya Emb., 199034 Saint Petersburg, Russia
| | - M. S. Kritsky
- Research Center of Biotechnology of the Russian Academy of Sciences, 33 Leninsky Prospect, Building 2, 119071 Moscow, Russia
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Obukhov YN, Neverov KV, Maleeva YV, Kritsky MS. Chlorophyll a Dimers Bound in the Water-Soluble Protein BoWSCP Photosensitize the Reduction of Cytochrome c. DOKL BIOCHEM BIOPHYS 2023; 509:60-64. [PMID: 37340294 DOI: 10.1134/s1607672923700126] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/20/2022] [Accepted: 11/30/2022] [Indexed: 06/22/2023]
Abstract
When bound to water-soluble proteins of the WSCP family, chlorophyll molecules form dimers structurally similar to the "special pair" of chlorophylls (bacteriochlorophylls) in photosynthetic reaction centers. Being exposed to red light (λ ≥ 650 nm) in oxygen-free solutions, chlorophyll a dimers harbored by BoWSCP holoproteins (from Brassica oleracea var. botrytis) have sensitized the reduction of cytochrome c. According to absorption and circular dichroism spectroscopy data, the photochemical process did not significantly impair the structure of chlorophyll a molecules as well as their dimers harbored by BoWSCP protein. Adding tris(hydroxymethyl)aminomethane as an electron donor for chlorophyll recovery stimulated the photoreduction of cytochrome c.
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Affiliation(s)
- Yu N Obukhov
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow, Russia.
| | - K V Neverov
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow, Russia
| | - Yu V Maleeva
- Faculty of Biology, Moscow State University, Moscow, Russia
| | - M S Kritsky
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow, Russia
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Telegina TA, Vechtomova YL, Kritsky MS, Madirov EI, Nizamutdinov AS, Obuhov YN, Buglak AA. Tetrahydrobiopterin Photooxidation: a Key Process in Vitiligo Phototherapy. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s000368382105015x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Filippovich SY, Onufriev MV, Peregud DI, Bachurina GP, Kritsky MS. Nitric-Oxide Synthase Activity in the Photomorphogenesis of Neurospora сrassa. APPL BIOCHEM MICRO+ 2020. [DOI: 10.1134/s0003683820040043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Vechtomova YL, Telegina TA, Kritsky MS. Evolution of Proteins of the DNA Photolyase/Cryptochrome Family. Biochemistry Moscow 2020; 85:S131-S153. [DOI: 10.1134/s0006297920140072] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Maleeva YV, Neverov KV, Obukhov YN, Kritsky MS. [Water Soluble Chlorophyll-Binding Proteins of Plants: Structure, Properties and Functions]. Mol Biol (Mosk) 2019; 53:998-1011. [PMID: 31876278 DOI: 10.1134/s0026898419060120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/09/2019] [Indexed: 11/23/2022]
Abstract
Water soluble chlorophyll-binding proteins (WSCPs) of higher plants differ from most proteins containing chlorophyll orbacteriochlorophyll in that they are soluble in watr and are neither embedded in the lipid membrane nor directly involved in the process of photosynthesis. Chlorophyll molecules in WSCPs ensembles are packed in dimers within the hydrophobic zone of the protein matrix, similar to the structure of a chlorophyll "special pair" in the reaction centers of phototrophs. This fact together with the detected photosensitizing activity of WSCPs makes it possible to consider these proteins as a promising object for modelling the evolutionary prototypes of the photosynthetic apparatus, as well as for developing the artificial solar energy converters. There are two classes of proteins in the WSCP family, class I and class II the representatives of these classes have a weak degree of homology in the primary structure, but a high degree of similarity in the tertiary and quaternary structure. One of the features of class I WSCPs is photoconversion, that is, to change the structure and spectral properties of the chromophore under the action of light. The functions of WSCPs in the plant are thought to be associated with stress protection.
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Affiliation(s)
- Yu V Maleeva
- Faculty of Biology, Moscow State University, Moscow, 119991 Russia.,
| | - K V Neverov
- Faculty of Biology, Moscow State University, Moscow, 119991 Russia.,Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Moscow, 117071 Russia
| | - Yu N Obukhov
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Moscow, 117071 Russia
| | - M S Kritsky
- Bach Institute of Biochemistry, Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Moscow, 117071 Russia
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Maleeva YV, Neverov KV, Obukhov YN, Kritsky MS. Water Soluble Chlorophyll-Binding Proteins of Plants: Structure, Properties and Functions. Mol Biol 2019. [DOI: 10.1134/s0026893319060128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Filippovich SY, Onufriev MV, Bachurina GP, Kritsky MS. The Role of Nitrogen Oxide in Photomorphogenesis in Neurospora сrassa. APPL BIOCHEM MICRO+ 2019. [DOI: 10.1134/s0003683819030074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Telegina TA, Biryukov MV, Terekhova IV, Vechtomova YL, Kritsky MS. Isolation and Characterization of Water-Soluble Chromoproteins from Arthrospira platensis Cyanobacteria: C-Phycocyanin, Allophycocyanin, and Carotenoid- and Chlorophyll-Binding Proteins. APPL BIOCHEM MICRO+ 2018. [DOI: 10.1134/s0003683818060145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kritsky MS, Popov VO. Aleksei Nikolaevich Bach. A Biographical Portrait of the Scientist on the Background of Historical Changes. APPL BIOCHEM MICRO+ 2018. [DOI: 10.1134/s0003683818020047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kritsky MS, Telegina TA, Vechtomova YL, Kolesnikov MP, Lyudnikova TA, Golub OA. Excited flavin and pterin coenzyme molecules in evolution. Biochemistry Moscow 2010; 75:1200-16. [DOI: 10.1134/s0006297910100020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Vechtomova YL, Telegina TA, Kolesnikov MP, Kritsky MS. Photobiochemistry of folates: A photochemical reduction of folic acid. APPL BIOCHEM MICRO+ 2010. [DOI: 10.1134/s0003683810030154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kritsky MS, Lyudnikova TA, Slutsky ES, Filimonenkov AA, Tikhonova TV, Popov VO. Photoexcited flavins and pterins as electron injectors for multiheme cytochrome. DOKL BIOCHEM BIOPHYS 2009; 424:16-9. [DOI: 10.1134/s1607672909010050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lyudnikova TA, Dashina OA, Telegina TA, Kritsky MS. Investigation of the photochemical properties of biopterin and its reduced forms. APPL BIOCHEM MICRO+ 2009. [DOI: 10.1134/s0003683809010189] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Affiliation(s)
- M S Kritsky
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow 119071, Russia
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Filippovich SY, Bachurina GP, Kritsky MS. A study of the nitrate and nitrite discharge from the mutant cells of Neurospora crassa lacking nitrate and nitrite reductase activities. APPL BIOCHEM MICRO+ 2007. [DOI: 10.1134/s0003683807030118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Telegina TA, Lyudnikova TA, Zemskova YL, Sviridov EA, Kritsky MS. Resistance of 5,10-methenyltetrahydrofolate to ultraviolet radiation. APPL BIOCHEM MICRO+ 2005. [DOI: 10.1007/s10438-005-0047-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Vladimirov MG, Ryzhkov YF, Alekseev VA, Bogdanovskaya VA, Otroshchenko VA, Kritsky MS. Electrochemical reduction of carbon dioxide on pyrite as a pathway for abiogenic formation of organic molecules. ORIGINS LIFE EVOL B 2004; 34:347-60. [PMID: 15279170 DOI: 10.1023/b:orig.0000029883.18365.af] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A wide spectrum of electrode potentials of minerals that compose sulfide ores enables the latter, when in contact with hydrothermal solutions, to form galvanic pairs with cathode potentials sufficient for electrochemical reduction of CO2. The experiments performed demonstrated the increase of cathode current on the rotating pyrite disc electrode in a range of potentials more negative than -800 mV in presence of CO2. In high-pressure experiments performed in a specially designed electrochemical cell equipped with a pyrite cathode and placed into autoclave, accumulation of formate was demonstrated after 24 hr passing of CO2 (50 atm, room temperature) through electrolyte solution. The formation of this product started on increasing the cathode potential to -800 mV (with respect to saturated silver chloride electrode). The yield grew exponentially upon cathode potential increase up to -1200 mV. The maximum current efficiency (0.12%) was registered at cathode potentials of about -1000 mV. No formate production was registered under normal atmospheric pressure and in the absence of imposed cathode potential. Neither in experiments, nor in control was formaldehyde found. It is proposed that the electrochemical reduction of CO2 takes part in the formation of organic molecules in hydrothermal solutions accompanying sulfide ore deposits and in 'black smokers' on the ocean floor.
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Affiliation(s)
- M G Vladimirov
- A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, Leninsky Prospect 33, Moscow, Russia.
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Filippovich SY, Bachurina GP, Kritsky MS. Effect of 5-Azacytidine on the Light-Sensitive Formation of Sexual and Asexual Reproductive Structures in wc-1 and wc-2 Mutants of Neurospora crassa. APPL BIOCHEM MICRO+ 2004. [DOI: 10.1023/b:abim.0000033918.72836.2e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Vladimirov MG, Ryzhkov Y, Alekseev VA, Bogdanovskaya VA, Kritsky MS, Otroshchenko VA. Experimental modeling of the cathode reduction of carbon dioxide on pyrite in deep hydrothermal vents. DOKL BIOCHEM BIOPHYS 2002; 385:205-8. [PMID: 12462972 DOI: 10.1023/a:1019911406659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M G Vladimirov
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 117071 Russia
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Kritsky MS, Telegina TA, Lyudnikova TA, Umrikhina AV, Zemskova Y. Participation of free radicals in photoreduction of pterins and folic acid. DOKL BIOCHEM BIOPHYS 2001; 380:336-8. [PMID: 11727559 DOI: 10.1023/a:1012344210189] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M S Kritsky
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 117071 Russia
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Kritsky MS, Filippovich S, Afanasieva TP, Bachurina GP, Russo VE. The involvement of photoregulated DNA methylation into a choice between sexual and asexual developmental pathways in Neurospora crassa. DOKL BIOCHEM BIOPHYS 2001; 378:203-5. [PMID: 11712181 DOI: 10.1023/a:1011569430802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M S Kritsky
- Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 117334 Russia
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Egorov SY, Krasnovsky AA, Bashtanov MY, Mironov EA, Ludnikova TA, Kritsky MS. Photosensitization of singlet oxygen formation by pterins and flavins. Time-resolved studies of oxygen phosphorescence under laser excitation. Biochemistry (Mosc) 1999; 64:1117-21. [PMID: 10561557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
To elucidate the biochemical roles of singlet molecular oxygen (1(O2)) in the light-dependent reactions photosensitized by biological blue-light photoreceptors, time-resolved measurements of photosensitized 1O2 phosphorescence (1270 nm) were performed in air-saturated aqueous ((D2)O) solutions of pterins (2-amino-4-hydroxy-6,7-dimethylpteridine (DMP) and 2-amino-4-hydroxy-6-tetrahydroxybutyl-(D-arabo)pteridine (TOP)) and flavins (riboflavin and flavin mononucleotide (FMN)) under excitation with nitrogen laser (337.1 nm) pulses. The 1(O2) quantum yields were found to be 0.16, 0.20, 0.50, and 0.50 for DMP, TOP, riboflavin, and FMN, respectively. The data indicate that pterins and flavins are rather efficient photosensitizers of 1(O2) production that might be important for their photobiological functions.
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Affiliation(s)
- S Y Egorov
- Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, 117021, Russia.
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Kritsky MS, Sokolovsky VY, Fedenko EP. Cyclic nucleotide metabolism and non-rhodopsin photoreception. ORIGINS LIFE EVOL B 1989. [DOI: 10.1007/bf02388928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kritsky MS, Afanasieva TP, Belozerskaya TA, Chailakhian LM, Chernysheva EK, Filippovich SY, Levina NN, Potapova TV, Sokolovsky VY. Photoreceptor Mechanism of Neurospora crassa: Control Over the Electrophysiological Properties of Cell Membrane and Over the Level of Nucleotide Regulators. ACTA ACUST UNITED AC 1984. [DOI: 10.1007/978-3-642-69767-8_23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Abstract
The specific activity of NAD+ kinase (ATP:NAD+ 2'-phosphotransferase, EC 2.7.1.23) from Neurospora crassa shows sharp peaks when the organism enters a new developmental stage of the asexual life cycle: the peaks are observed during hydration and germination of conidia, at the transition from exponential to stationary growth and at the photostimulated conidiation. As stimulation of NAD+ kinase activity by light in conidiating mycelium is not sensitive to translation inhibitors, the activation of pre-existing molecules, rather than induction of protein synthesis de novo may be supposed. Enzyme electrophoresis revealed the presence of four forms of NAD+ kinase having different apparent molecular weights (I = 333,000; II = 306,000; III = 229,000 and IV = 203,000). Manifestation of the activity of individual forms of NAD+ kinase is developmentally controlled: form III is most abundant during vegetative growth, forms I and II prevail in conidia. At the conidial germination the increase of NAD+ kinase activity is associated with the activation of form III, whereas during photostimulation of conidiation form II is the most activated one. Therefore, certain molecular forms of the enzyme may be regarded as biochemical markers for different developmental stages of N. crassa.
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