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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1812</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СПЕКТРОСКОПИЯ В БИОЛОГИИ И МЕДИЦИНЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SPECTROSCOPY IN BIOLOGY AND MEDICINE</subject></subj-group></article-categories><title-group><article-title>Исследование пространственной структуры β-амилоидного пептида (25-35) по данным спектроскопии кругового дихроизма в среде, приближенной к условиям мембранного окружения</article-title><trans-title-group xml:lang="en"><trans-title>Study of the Spatial Structure of  β-Amyloid Peptide (25-35) from Circular Dichroism Spectroscopy in the Medium Close to Membrane Environment Conditions</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Агаева</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Agaeva</surname><given-names>G. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баку</p></bio><bio xml:lang="en"><p>Baku</p></bio><email xlink:type="simple">gulshen@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Наджафова</surname><given-names>Г. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Najafova</surname><given-names>G. Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баку</p></bio><bio xml:lang="en"><p>Baku</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маммадова</surname><given-names>А. Дж.</given-names></name><name name-style="western" xml:lang="en"><surname>Mammadov</surname><given-names>A. Dj.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баку</p></bio><bio xml:lang="en"><p>Baku</p></bio><email xlink:type="simple">a.k134@hotmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физических проблем Бакинского государственного университета</institution></aff><aff xml:lang="en"><institution>Institute for Physical Problems, Baku State University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Азербайджано-французский университет</institution></aff><aff xml:lang="en"><institution>French-Azerbaijani University</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт биофизики Министерства науки и образования Азербайджанской Республики</institution></aff><aff xml:lang="en"><institution>Institute of Biophysics of Ministry of Science and Education of Azerbaijan Republic</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>03</month><year>2025</year></pub-date><volume>92</volume><issue>2</issue><fpage>216</fpage><lpage>221</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Агаева Г.А., Наджафова Г.З., Маммадова А.Д., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Агаева Г.А., Наджафова Г.З., Маммадова А.Д.</copyright-holder><copyright-holder xml:lang="en">Agaeva G.A., Najafova G.Z., Mammadov A.D.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://zhps.ejournal.by/jour/article/view/1812">https://zhps.ejournal.by/jour/article/view/1812</self-uri><abstract><p>Методом спектроскопии кругового дихроизма в среде, приближенной к условиям мембранного окружения, исследована пространственная структура β-амилоидного пептида (25-35) в растворе дипальмитоилфосфатидилхолина (DPPC) c холестерином и без него. Обнаружено, что пептид принимает структуры a-спирали, β-слоя, β-поворота и нерегулярных участков, причем их относительные пропорции изменяются в зависимости от наличия холестерина. Результаты спектрального анализа β-амилоидного пептида (25-35) позволяют предложить вторичную структуру пептида в липидном растворителе. Показано, что упорядочение вторичной структуры β-амилоидного пептида (25-35) наблюдается в растворе DPPC, максимально моделирующем среду на поверхности плазматической мембраны.</p></abstract><trans-abstract xml:lang="en"><p>The spatial structure of β-amyloid peptide (25-35) was studied using circular dichroism spectroscopy in a medium close to the conditions of the membrane environment. The conformational preference of β-amyloid peptide (25-35) was first studied in dipalmitoylphosphatidylcholine (DPPC) solution with and without cholesterol using circular dichroism spectroscopy. It was found that the peptide adopts the structures of the a- helix, β-sheet, β-turn and irregular regions, and their relative proportions changed depending on the presence of cholesterol. The results of the spectral analysis of β-amyloid peptide (25-35) made it possible to unambiguously assume the secondary structure of the peptide in a lipid solvent. It has been shown that ordering of the secondary structure of the β-amyloid peptide (25-35) is observed in the solution with DPPC, which maximally simulates the environment on the surface of the plasma membrane.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>β-амилоидный пептид (25-35)</kwd><kwd>спектр кругового дихроизма</kwd><kwd>конформация</kwd><kwd>элемент вторичной структуры</kwd><kwd>α-спиральная структура</kwd></kwd-group><kwd-group xml:lang="en"><kwd>β-amyloid peptide (25-35)</kwd><kwd>circular dichroism spectrum</kwd><kwd>conformation</kwd><kwd>secondary structure element</kwd><kwd>α-helical structure</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">M. P. Murphy, H. LeVine III. J. Alzheimer’s Disease, 19 (2010) 311—323, doi: 10.3233/JAD-2010-1221</mixed-citation><mixed-citation xml:lang="en">M. P. Murphy, H. LeVine III. J. Alzheimer’s Disease, 19 (2010) 311—323, doi: 10.3233/JAD-2010-1221</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">L. N. Zhao, L. Lu, L. Y. Chew, Y. Mu. Int. J. Mol. Sci., 15 (2014) 12631—12650, doi: 10.3390/ijms150712631</mixed-citation><mixed-citation xml:lang="en">L. N. Zhao, L. Lu, L. Y. Chew, Y. Mu. Int. J. Mol. Sci., 15 (2014) 12631—12650, doi: 10.3390/ijms150712631</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">E. Cerf, R. Sarroukh, S. Tamamizu-Kato, L. Breydo, S. Derclaye, Y. F. Dufrêne, V. Narayanaswami, E. Goormaghtigh, J-M. Ruysschaert, V. Raussens. Biochem. J., 421 (2009) 415—423, doi: 10.1042/BJ20090379.</mixed-citation><mixed-citation xml:lang="en">E. Cerf, R. Sarroukh, S. Tamamizu-Kato, L. Breydo, S. Derclaye, Y. F. Dufrêne, V. Narayanaswami, E. Goormaghtigh, J-M. Ruysschaert, V. Raussens. Biochem. J., 421 (2009) 415—423, doi: 10.1042/BJ20090379.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">R. Sultana, H. F. Poon, J. Cai, W. M. Pierce, M. Merchant, J. B. Klein, W. R. Markesbery, D. A. Butterfield. Neurobiol. Dis., 22 (2006) 76—87, doi: 10.1016/j.nbd.2005.10.004</mixed-citation><mixed-citation xml:lang="en">R. Sultana, H. F. Poon, J. Cai, W. M. Pierce, M. Merchant, J. B. Klein, W. R. Markesbery, D. A. Butterfield. Neurobiol. Dis., 22 (2006) 76—87, doi: 10.1016/j.nbd.2005.10.004</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Y. Fezoui, D. M. Hartley, D. M. Walsh, D. J. Selkoe, J. J. Osterhout, D. B. Teplow. Nat. Struct. Biol., 7 (2000) 1095—1099, http://structbio.nature.com</mixed-citation><mixed-citation xml:lang="en">Y. Fezoui, D. M. Hartley, D. M. Walsh, D. J. Selkoe, J. J. Osterhout, D. B. Teplow. Nat. Struct. Biol., 7 (2000) 1095—1099, http://structbio.nature.com</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">G. Shanmugam, R. Jayakumar. Biopolymers, 33 (2004) 421—434, doi: 10.1001/bip.20131</mixed-citation><mixed-citation xml:lang="en">G. Shanmugam, R. Jayakumar. Biopolymers, 33 (2004) 421—434, doi: 10.1001/bip.20131</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">G. Shanmugam, P. L. Polavarapu. Biophys. J., 87 (2004) 622—630, doi: 10.1520/biophysj.104040907</mixed-citation><mixed-citation xml:lang="en">G. Shanmugam, P. L. Polavarapu. Biophys. J., 87 (2004) 622—630, doi: 10.1520/biophysj.104040907</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">A. M. D’Ursi, M. R. Armenante, R. Guerrini, S. Salvadori, G. Sorrentino, D. Picone. J. Med. Chem., 12 (2004) 4231—4238, doi: 10.1021/jm040773o</mixed-citation><mixed-citation xml:lang="en">A. M. D’Ursi, M. R. Armenante, R. Guerrini, S. Salvadori, G. Sorrentino, D. Picone. J. Med. Chem., 12 (2004) 4231—4238, doi: 10.1021/jm040773o</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">G. Wei, J. E. Shea. Biophys. J., 91 (2006) 1638—1647, doi: 10.1529/biophysj/105.079186</mixed-citation><mixed-citation xml:lang="en">G. Wei, J. E. Shea. Biophys. J., 91 (2006) 1638—1647, doi: 10.1529/biophysj/105.079186</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">S. Lee, Y. Kim. Bull. Korean Chem. Soc., 25 (2004) 838—842, doi: 10/5012/bkcs/2004/25/6/838</mixed-citation><mixed-citation xml:lang="en">S. Lee, Y. Kim. Bull. Korean Chem. Soc., 25 (2004) 838—842, doi: 10/5012/bkcs/2004/25/6/838</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">L. Millucci, L. Ghezzi, G. Bernardini, A. Santucci. Current. Protein and Peptide Science, 11 (2010) 54—67, doi: 10.2174/138920310790274626</mixed-citation><mixed-citation xml:lang="en">L. Millucci, L. Ghezzi, G. Bernardini, A. Santucci. Current. Protein and Peptide Science, 11 (2010) 54—67, doi: 10.2174/138920310790274626</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">E. Terzi, G. Holzemann, J. Seelig. Biochemistry, 33 (1994) 1345—1350, doi: 10.1021/bi00172a009</mixed-citation><mixed-citation xml:lang="en">E. Terzi, G. Holzemann, J. Seelig. Biochemistry, 33 (1994) 1345—1350, doi: 10.1021/bi00172a009</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Y. Song, P. Li, L. Liu, C. Bartolini, M. Dong. Sci. Reports, 8 (2018) 765—774, doi: 10.1038/s41598-017-19106-y</mixed-citation><mixed-citation xml:lang="en">Y. Song, P. Li, L. Liu, C. Bartolini, M. Dong. Sci. Reports, 8 (2018) 765—774, doi: 10.1038/s41598-017-19106-y</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">H.-H. G. Tsai, J.-B. Lee, Y. C. Shih, L. Wan, F.-K. Shieh, C.-Y. Chen. ChemMedChem, 9, N 5 (2014) 1002—1011, https://chemistryeurope.onlinelibrary.wiley.com/doi/10.1002/cmdc.201400062</mixed-citation><mixed-citation xml:lang="en">H.-H. G. Tsai, J.-B. Lee, Y. C. Shih, L. Wan, F.-K. Shieh, C.-Y. Chen. ChemMedChem, 9, N 5 (2014) 1002—1011, https://chemistryeurope.onlinelibrary.wiley.com/doi/10.1002/cmdc.201400062</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">A. Santoro, M. Buonocore, M. Grimaldi, E. Napolitano, A. M. D’Ursi. Int. J. Mol. Sci., 24, N 2 (2023) 971, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9867351/</mixed-citation><mixed-citation xml:lang="en">A. Santoro, M. Buonocore, M. Grimaldi, E. Napolitano, A. M. D’Ursi. Int. J. Mol. Sci., 24, N 2 (2023) 971, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9867351/</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">N. Kandel, J. O. Matos, S. A. Tatulian. Sci. Rep., 9 (2019) 2689, https://www.nature.com/articles/s41598-019-38749-7</mixed-citation><mixed-citation xml:lang="en">N. Kandel, J. O. Matos, S. A. Tatulian. Sci. Rep., 9 (2019) 2689, https://www.nature.com/articles/s41598-019-38749-7</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">G. D’Errico, G. Vitiello, Ornella Ortona, A. Tedeschi, A. Ramunno, A. M. D’Ursi. Biochim. Biophys. Acta, 1778 (2008) 2710—2716</mixed-citation><mixed-citation xml:lang="en">G. D’Errico, G. Vitiello, Ornella Ortona, A. Tedeschi, A. Ramunno, A. M. D’Ursi. Biochim. Biophys. Acta, 1778 (2008) 2710—2716</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">S. Dante, T. Hauß, N. A. Dencher. Eur. Biophys J., 35 (2006), 523—531, https://doi.10.1007/s00249-006-0062-x</mixed-citation><mixed-citation xml:lang="en">S. Dante, T. Hauß, N. A. Dencher. Eur. Biophys J., 35 (2006), 523—531, doi. 10.1007/s00249-006-0062-x</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">V. Rudajev, J. Novotny. Front Mol. Neurosci., 15 (2022) 937056, doi: 10.3389/fnmol.2022.937056</mixed-citation><mixed-citation xml:lang="en">V. Rudajev, J. Novotny. Front Mol. Neurosci., 15 (2022) 937056, https://doi:10.3389/fnmol.2022.937056</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">M. D. Rieth, A. Lozano. Biochem. Biophys. Rep., 22 (2020) 100764, doi: 10.1016/j.bbrep.2020.100764</mixed-citation><mixed-citation xml:lang="en">M. D. Rieth, A. Lozano. Biochem. Biophys. Rep., 22 (2020) 100764, doi: 10.1016/j.bbrep.2020.100764</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">L. Whitmore, B. A. Wallace. Nucl. Acids Res., 32 (2004) W668—W673, doi: 10.1093/nar/gkh371</mixed-citation><mixed-citation xml:lang="en">L. Whitmore, B. A. Wallace. Nucl. Acids Res., 32 (2004) W668—W673, doi: 10.1093/nar/gkh371</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">L. Whitmore, B. A. Wallace. Biopolymers, 89 (2008) 392—400, doi: 10.1002/bip.20853</mixed-citation><mixed-citation xml:lang="en">L. Whitmore, B. A. Wallace. Biopolymers, 89 (2008) 392—400, doi: 10.1002/bip.20853</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">L. A. Compton, W. C. Johnson. Anal. Biochem., 155 (1986) 155—167, doi: 10.1016/0003-2697(86)90241-1</mixed-citation><mixed-citation xml:lang="en">L. A. Compton, W. C. Johnson. Anal. Biochem., 155 (1986) 155—167, doi: 10.1016/0003-2697(86)90241-1</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">P. Manavalan, W. C. Johnson. Anal. Biochem., 167 (1987) 76—85, doi: 10.1016/0003-2697(87)90135-7</mixed-citation><mixed-citation xml:lang="en">P. Manavalan, W. C. Johnson. Anal. Biochem., 167 (1987) 76—85, doi: 10.1016/0003-2697(87)90135-7</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">T. Kohno, K. Kobayashi, T. Maeda, K. Sato, A. Takashima. Biochemistry, 35 (1996) 16094—16104, doi: 10.1021/bi961598j</mixed-citation><mixed-citation xml:lang="en">T. Kohno, K. Kobayashi, T. Maeda, K. Sato, A. Takashima. Biochemistry, 35 (1996) 16094—16104, doi: 10.1021/bi961598j</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">S. Vivekanandan, J. R. Brender, S. Y. Lee, A. Ramamoorthy. Biochem. Biophys. Res. Commun., 411 (2011) 312—316, doi: 10.1016/j.bbrc.2011.06.133</mixed-citation><mixed-citation xml:lang="en">S. Vivekanandan, J. R. Brender, S. Y. Lee, A. Ramamoorthy. Biochem. Biophys. Res. Commun., 411 (2011) 312—316, doi: 10.1016/j.bbrc.2011.06.133</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Y. Fezoui, D. B. Teplow. J. Biol. Chem., 277 (2002) 36948—36954, doi: 10.1074/jbc.M204168200</mixed-citation><mixed-citation xml:lang="en">Y. Fezoui, D. B. Teplow. J. Biol. Chem., 277 (2002) 36948—36954, doi: 10.1074/jbc.M204168200</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Г. А. Агаева. Журн. прикл. спектр., 72 (2005) 416—421</mixed-citation><mixed-citation xml:lang="en">G. A. Agaeva. J. Appl. Spectr., 72 (2005) 447—453</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">G. A. Agaeva, G. Z. Najafova. Russ. Biophysics, 68, N 5 (2023) 871—877, doi: 10.1134/S0006350923050020</mixed-citation><mixed-citation xml:lang="en">G. A. Agaeva, G. Z. Najafova. Russ. Biophysics, 68, N 5 (2023) 871—877, doi: 10.1134/S0006350923050020</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
