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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">foodsyst</journal-id><journal-title-group><journal-title xml:lang="en">Food systems</journal-title><trans-title-group xml:lang="ru"><trans-title>Пищевые системы</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2618-9771</issn><issn pub-type="epub">2618-7272</issn><publisher><publisher-name>Федеральный научный центр пищевых систем им. В.М. Горбатова РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21323/2618-9771-2023-6-3-317-328</article-id><article-id custom-type="elpub" pub-id-type="custom">foodsyst-300</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Properties and structural features of native and modified proteins of concentrates from white and brown rice</article-title><trans-title-group xml:lang="ru"><trans-title>Свойства и структурные особенности белков нативных и модифицированных концентратов из белого и коричневого риса</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7288-8569</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колпакова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolpakova</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колпакова Валентина Васильевна — доктор технических наук, профессор, главный научный сотрудник, заведующий отделом биотехнологии комплексной переработки крахмалсодержащего сырья</p><p>140051, Московская область, п. Красково, ул. Некрасова, 11</p><p>Тел.: + 7–495–557–15–00</p></bio><bio xml:lang="en"><p>Valentina V. Kolpakova, Doctor of Technical Sciences, Professor, Chief Researcher, Head of the Department of Biotechnology for the Complex Processing of Starch-Containing Raw Materials</p><p>11, Nekrasova Str., 140051, Kraskovo, Lyubertsy, Moscow region</p><p>Tel.: + 7–495–557–15–00</p></bio><email xlink:type="simple">vniik@arrisp.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-6870-5839</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фан</surname><given-names>К. Ч.</given-names></name><name name-style="western" xml:lang="en"><surname>Fan</surname><given-names>Q. Ch.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фан Куинь Чам  — кандидат технических наук, преподаватель</p><p>620000, 01 Нгуен Ван Хьюен, округ 9, г. Туй Хоа,  — провинция Фу Йен</p><p>Тел.: +84–57–384–3025</p></bio><bio xml:lang="en"><p>Quynh Ch. Fan, Сandidate of Technical Sciences, Lecturer</p><p>620000, 01 Nguyen Van Huyen, Ward 9, Tuy Hoa City, Phu Yen Province</p><p>Tel.: +84–57–384–3025</p></bio><email xlink:type="simple">quynhtram221@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4036-1316</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гайворонская</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Gaivoronskaya</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гайворонская Ирина Сергеевна — младший научный сотрудник отдела биотехнологии комплексной переработки крахмалсодержащего сырья</p><p>140051, Московская область, п. Красково, ул. Некрасова, 11</p><p>Тел.: + 7–495–557–15–00</p></bio><bio xml:lang="en"><p>Irina S. Gaivoronskaya, Junior Researcher, Department of Biotechnology for Complex Processing of Starch-Containing Raw Materials</p><p>11, Nekrasova Str., 140051, Kraskovo, Lyubertsy, Moscow region</p><p>Tel.: + 7–495–557–15–00</p></bio><email xlink:type="simple">vniik@arrisp.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8414-5212</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чумикина</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chumikina</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чумикина Людмила Васильевна — кандидат биологических наук, старший научный сотрудник</p><p>119071, Москва, Ленинский проспект, 33</p><p>Тел.: + 7–926–355–39–29</p></bio><bio xml:lang="en"><p>Lyudmila V. Chumikina, Candidate of Biological Sciences, Senior Researcher</p><p>33, Leninsky Ave, 119071, Moscow</p><p>Тел.: + 7-(926–355–39–29</p></bio><email xlink:type="simple">chumikina@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт крахмала и переработки крахмалсодержащего сырья — филиал Федерального исследовательского центра картофеля имени А. Г. Лорха</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Research Institute of Starch and Starch-containing Raw Materials Processing — Branch of Russian &#13;
Potato Research Centre</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Фу Йен университет</institution><country>Вьетнам</country></aff><aff xml:lang="en"><institution>Phu Yen University</institution><country>Viet Nam</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт биохимии им. А. Н. Баха, Федеральный исследовательский центр «Фундаментальные основы биотехнологии»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A. N. Bach Institute of Biochemistry, Federal Research Center «Fundamental Foundations of Biotechnology», of Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>12</day><month>10</month><year>2023</year></pub-date><volume>6</volume><issue>3</issue><fpage>317</fpage><lpage>328</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kolpakova V.V., Fan Q.C., Gaivoronskaya I.S., Chumikina L.V., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Колпакова В.В., Фан К.Ч., Гайворонская И.С., Чумикина Л.В.</copyright-holder><copyright-holder xml:lang="en">Kolpakova V.V., Fan Q.C., Gaivoronskaya I.S., Chumikina L.V.</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://www.fsjour.com/jour/article/view/300">https://www.fsjour.com/jour/article/view/300</self-uri><abstract><p>The physicochemical properties and structural features of proteins of concentrates (PC) from white and brown rice are described. Differences in a degree of proteolysis and the relationship between the functional and technological properties of proteins and their structure were established. Proteins from white rice had lower molecular weights (MW) than proteins from brown rice: 1.3–199.5 kDa versus 1.5–251.1 kDa. Most proteins were grouped in three low-molecular-weight fractions (МW 11.7–27.5 kDa) in PC from white rice and in one fraction with the high molecular weight (182–251.1 kDa) in PC from brown rice. In the process of hydrolysis, the MW of proteins (high-molecular-weight) of PC from white rice decreased from 199.5 to 120.2 kDa with generation of peptides with a molecular weight of &lt;1.3 kDa, while the MW remained unchanged upon hydrolysis of proteins of PC from brown rice. In the composition of PC from white rice, flavonoids interacted with protein fractions with molecular weights of 131, 10, and 4.0 kDa; while in PC from brown rice, they interacted with only one fraction with a molecular weight of 216 kDa. The quantity of flavonoids in PC from white rice was 2.3 times less than that in PC from brown rice. Elements of protein secondary structure were established for PC: α–helix, 310 — helix, β-structure, β-bends, and irregular shape. Proteolysis of proteins was accompanied by a decrease in the number of α-helices, increase in the proportion of β-structures and irregular regions, weakening of the hydrophobic properties of proteins and an increase in the number of S–S bonds; PC from brown rice was characterized by a higher content of –СН2  groups from the flavonoid family, as well as by a higher degree of unsaturation of groups of benzene nuclei, ketone and ester groups. A negative correlation was found between the foaming ability of PC and the upper boundaries of molecular weights (r = — 0.95), quantity of high-molecular weight proteins (r = — 0.80) and aggregation constants, and a positive correlation (r = + 0.8) with the number of S–S bonds. The high foaming ability is interrelated with proteins with a molecular weight of no more than 120 kDa. The results are intended to regulate the functional properties of protein products based on the characteristics of the physicochemical properties of native and modified proteins.</p></abstract><trans-abstract xml:lang="ru"><p>Описаны физико-химические свойства и структурные особенности белков концентратов (БК) из белого и коричневого риса. Установлены отличия в степени протеолиза и взаимосвязь функционально-технологических свойств белков с их структурой. Белки из белого риса имели более низкие молекулярные массы (ММ), чем белки из коричневого риса: 1,3–199,5 кДа против 1,5–251,1 кДа. У БК из белого риса большая часть белков сосредоточена в 3 низкомолекулярных фракциях (ММ 11,7–27,5 кДа), тогда как у БК из коричневого риса — в одной с высокой ММ (182–251,1 кДа). В процессе гидролиза ММ белков (ВМ) БК из белого риса понижались с 199,5 до 120,2 кДа с образованием пептидов с ММ &lt; 1,3 кДа, тогда как при гидролизе белков БК из коричневого риса ММ не изменялись. В составе БК из белого риса флавоноиды взаимодействовали с фракциями белков с ММ 131, 10 и 4,0 кДа, а в БК из коричневого риса — только с одной фракцией с ММ 216 кДа. Количество флавоноидов в БК из белого риса в 2,3 раза меньше, чем в БК из коричневого риса. Для БК установлены элементы вторичной структуры белков: α — спираль, 310 — спираль, β–структура, β–изгибы и неупорядоченная форма. Протеолиз белков сопровождался уменьшением α-спиралей, увеличением β-структуры и нерегулярных участков, ослаблением гидрофобных свойств белков и повышением количества S–S связей: БК из коричневого риса характеризовались большим содержанием –СН2 групп семейства флавоноидов, а также более высокой степенью ненасыщенности групп бензольных ядер, кетонных и сложноэфирных группировок. Выявлена отрицательная корреляция между пенообразующей способностью БК и верхними границами значений ММ (r = — 0,95), количеством ВМ белков (r = — 0,80) и константами агрегации (r = — 0,8 и — 1,0) и положительная корреляция (r = + 0,8) — с количеством S–S связей. Высокая пенообразующая способность взаимосвязана с белками с ММ не более 120 кДа. Результаты предназначены для регулирования функциональных свойств белковых продуктов на основе особенностей физико-химических свойств нативных и модифицированных белков.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>протеолиз</kwd><kwd>флавоноиды</kwd><kwd>молекулярные массы</kwd><kwd>вторичная структура</kwd><kwd>дисульфидные связи</kwd><kwd>агрегация</kwd><kwd>функциональные свойства</kwd><kwd>корреляция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>proteolysis</kwd><kwd>flavonoids</kwd><kwd>molecular weights</kwd><kwd>secondary structure</kwd><kwd>disulfide bonds</kwd><kwd>aggregation</kwd><kwd>functional properties</kwd><kwd>correlation</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">Amanullah, Fahad, S. (2017). Rice — Technology and Production. InTech. 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