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            <front>

                <journal-meta>
                                                                <journal-id>j. nat. appl. sci.</journal-id>
            <journal-title-group>
                                                                                    <journal-title>Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi</journal-title>
            </journal-title-group>
                                        <issn pub-type="epub">1308-6529</issn>
                                                                                            <publisher>
                    <publisher-name>Süleyman Demirel University</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id pub-id-type="doi">10.19113/sdufenbed.1734812</article-id>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Enzymes</subject>
                                                            <subject>Proteins and Peptides</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Enzimler</subject>
                                                            <subject>Proteinler ve Peptitler</subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <article-title>Polinükleer Metal Komplekslerin Plazmid DNA, Alkalen Proteaz Üzerine Etkileri ve Antioksidan Kapasiteleri</article-title>
                                                                                                                                                                                                <trans-title-group xml:lang="en">
                                    <trans-title>Effects of Polynuclear Metal Complexes on Plasmid DNA, Alkaline Protease, and Their Antioxidant Capacities</trans-title>
                                </trans-title-group>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0001-6180-7586</contrib-id>
                                                                <name>
                                    <surname>Doğan</surname>
                                    <given-names>Şevkinaz</given-names>
                                </name>
                                                                    <aff>MEHMET AKİF ERSOY ÜNİVERSİTESİ</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0002-5457-8188</contrib-id>
                                                                <name>
                                    <surname>Özmen</surname>
                                    <given-names>İsmail</given-names>
                                </name>
                                                                    <aff>SÜLEYMAN DEMİREL ÜNİVERSİTESİ</aff>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20260424">
                    <day>04</day>
                    <month>24</month>
                    <year>2026</year>
                </pub-date>
                                        <volume>30</volume>
                                        <issue>1</issue>
                                        <fpage>51</fpage>
                                        <lpage>58</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20250704">
                        <day>07</day>
                        <month>04</month>
                        <year>2025</year>
                    </date>
                                                    <date date-type="accepted" iso-8601-date="20260309">
                        <day>03</day>
                        <month>09</month>
                        <year>2026</year>
                    </date>
                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 1995, Süleyman Demirel University Journal of Natural and Applied Sciences</copyright-statement>
                    <copyright-year>1995</copyright-year>
                    <copyright-holder>Süleyman Demirel University Journal of Natural and Applied Sciences</copyright-holder>
                </permissions>
            
                                                                                                <abstract><p>Bu çalışmada, daha önce sentezlenmiş olan ,N′-Bis[1-(4-fenilfenil)-2-hidroksiimino-2-(pirolidino)-1-etiliden]-1,3-propandiamin ve bunun heterodinükleer Cu(II)-Mn(II) ve Cu(II)-Co(II) kompleksileri,  N,N′-Bis[1-(4-fenilfenil)-2-hidroksiimino-2-(4-kloroanilino)-1-etiliden]-1,3-propandiamin ve bunun homodinükleer Cu(II) kompleksi ve homotrinükleer Cu(II) komplekslerinin Bacillus subtilis kaynaklı alkalen proteaz ve plazmid DNA’ya olan etkileri ile antioksidan aktiviteleri araştırılmıştır. Enzim, uygun koşullarda üretildikten sonra amonyum sülfat çöktürme yöntemi ve jel filtrasyon tekniği ile %9,9 verimle ve 69,6 kat saflaştırılmış; SDS-PAGE ile protein molekülünün ağırlığı 30,0 kDa  bulunmuştur. Komplekslerin proteaz aktivitesini artırdığı belirlenmiştir. Antioksidan testlerde, homodinükleer Cu(II) içeren B2 kompleksi en yüksek etkiyi göstermiştir. Ayrıca, Cu(II) komplekslerinin DNA’nın doğrusal formunu artırdığı, H₂O₂ varlığında bu etkinlik belirgin şekilde artmıştır. Komplekslerin bazıları tamamen DNA’yı  parçalarken bazıları ise hidrojen peroksit içeriğiyle süper sarmal şeklini tümüyle parçalamıştır.</p></abstract>
                                                                                                                                    <trans-abstract xml:lang="en">
                            <p>In this work, the influence of previously synthesized compounds on alkaline protease isolated from Bacillus subtilis, their interaction with plasmid DNA, and their antioxidant potential were examined.The compounds evaluated included N′-Bis[1-(4-phenylphenyl)-2-hydroxyimino-2-(pyrrolidino)-1-ethylidene]-1,3-propanediamine along with its heterodinuclear Cu(II)-Mn(II) and Cu(II)-Co(II) complexes, as well as N,N′-Bis[1-(4-phenylphenyl)-2-hydroxyimino-2-(4-chloroanilino)-1-ethylidene]-1,3-propanediamine and its homodinuclear and homotrinuclear Cu(II) complexes. Under optimized production conditions, the enzyme underwent purification utilizing a sequential process of ammonium sulfate precipitation followed by gel filtration chromatography. This process led to a 69.6-fold increase in purity, with an overall recovery yield of 9.9%. SDS-PAGE analysis revealed a single protein band with a molecular weight of approximately 30.0 kD. Metal complexes have been demonstrated to enhance protease activity. Among the complexes under investigation, the homodinuclear Cu(II) complex B2 demonstrated the highest antioxidant activity. Furthermore, the presence of Cu(II) complexes resulted in an augmentation of linear plasmid DNA, an effect that was considerably amplified in the presence of H₂O₂. It was observed that certain complexes were capable of completely degrading DNA, while others were able to disrupt the supercoiled structure upon the addition of hydrogen peroxide.</p></trans-abstract>
                                                            
            
                                                            <kwd-group>
                                                    <kwd>Alkaline proteaz</kwd>
                                                    <kwd>  Bacillus subtilis</kwd>
                                                    <kwd>  Schiff bazı</kwd>
                                                    <kwd>  Antioksidan</kwd>
                                                    <kwd>  Plazmid DNA.</kwd>
                                            </kwd-group>
                                                        
                                                                            <kwd-group xml:lang="en">
                                                    <kwd>Alkaline protease</kwd>
                                                    <kwd>  Bacillus subtilis</kwd>
                                                    <kwd>  Schiff base</kwd>
                                                    <kwd>  Antioxidant</kwd>
                                                    <kwd>  Plasmid DNA.</kwd>
                                            </kwd-group>
                                                                                                        <funding-group specific-use="FundRef">
                    <award-group>
                                                    <funding-source>
                                <named-content content-type="funder_name">Süleyman Demirel Üniversitesi Bilimsel Araştırma Projeleri Yönetim Birimi</named-content>
                            </funding-source>
                                                                            <award-id>2146-D-10</award-id>
                                            </award-group>
                </funding-group>
                                </article-meta>
    </front>
    <back>
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