Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies
Abstract Indole-thiosemicarbazones have different biological activities. The present study evaluated the preliminary interaction of these compounds with biomolecules, specifically human serum albumin (HSA) and DNA, using fluorescence techniques. The suppression results (Ksv) for HSA ranged from 3.5...
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Instituto de Tecnologia do Paraná (Tecpar)
2025-05-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132025000100402&lng=en&tlng=en |
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| author | Keriolaine Lima dos Santos Diego Santa Clara Marques Iris Trindade Jacob Paula Roberta da Silva Dijanah Cota Machado Túlio Ricardo Couto de Lima Souza Jamerson Ferreira de Oliveira Sinara Mônica Vitalino Almeida Iranildo José da Cruz Filho Maria do Carmo Alves de Lima |
| author_facet | Keriolaine Lima dos Santos Diego Santa Clara Marques Iris Trindade Jacob Paula Roberta da Silva Dijanah Cota Machado Túlio Ricardo Couto de Lima Souza Jamerson Ferreira de Oliveira Sinara Mônica Vitalino Almeida Iranildo José da Cruz Filho Maria do Carmo Alves de Lima |
| author_sort | Keriolaine Lima dos Santos |
| collection | DOAJ |
| description | Abstract Indole-thiosemicarbazones have different biological activities. The present study evaluated the preliminary interaction of these compounds with biomolecules, specifically human serum albumin (HSA) and DNA, using fluorescence techniques. The suppression results (Ksv) for HSA ranged from 3.5 x 104 to 4.6 x 105 L/mol, while for DNA, they ranged from 1.4 x 104 to 5.9 x 104 L/mol. The suppression was classified as weak to strong for HSA and moderate for DNA. The bimolecular suppression constant (Kq) showed values between 6.0 x 1012 and 8.2 x 1013 L/mol/s for HSA and from 1.4 x 1012 to 5.9 x 1012 L/mol/s for DNA, suggesting a static suppression mechanism. Compound PR09 stood out, presenting a binding constant (Ka) greater than 105 L/mol for HSA, indicating a strong interaction. Additionally, PR05, PR06, PR07, and PR09 demonstrated strong interactions with DNA. The values of the number of binding sites (n) indicated that PR01, PR02, and PR09 bind to multiple sites on HSA, while PR04, PR05, PR06, and PR09 interact with more than one site on DNA. All interactions were spontaneous, with ∆G negative. The distance between the compounds and tryptophan on HSA was less than 8 nm, suggesting high energy transfer efficiency. In molecular docking studies, PR05 showed the highest affinity for DNA (-11.15 kcal/mol), while PR09 had the highest affinity for HSA (-10.00 kcal/mol). PR07 exhibited the lowest binding energies for DNA (-8.21 kcal/mol) and for HSA (-7.38 kcal/mol). This study demonstrates that the evaluated compounds have potential as new drug candidates. |
| format | Article |
| id | doaj-art-2e9889b6de2d4e429c6e88c6148bc708 |
| institution | OA Journals |
| issn | 1678-4324 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj-art-2e9889b6de2d4e429c6e88c6148bc7082025-08-20T01:54:02ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1678-43242025-05-016810.1590/1678-4324-2025230768Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking StudiesKeriolaine Lima dos Santoshttps://orcid.org/0000-0003-2665-0119Diego Santa Clara Marqueshttps://orcid.org/0000-0002-5987-1738Iris Trindade Jacobhttps://orcid.org/0000-0002-9420-9723Paula Roberta da Silvahttps://orcid.org/0009-0001-7823-7564Dijanah Cota Machadohttps://orcid.org/0000-0002-5466-0229Túlio Ricardo Couto de Lima Souzahttps://orcid.org/0000-0001-5595-1637Jamerson Ferreira de Oliveirahttps://orcid.org/0000-0001-9606-8154Sinara Mônica Vitalino Almeidahttps://orcid.org/0000-0002-2605-4192Iranildo José da Cruz Filhohttps://orcid.org/0000-0002-5466-6567Maria do Carmo Alves de Limahttps://orcid.org/0000-0002-8277-3458Abstract Indole-thiosemicarbazones have different biological activities. The present study evaluated the preliminary interaction of these compounds with biomolecules, specifically human serum albumin (HSA) and DNA, using fluorescence techniques. The suppression results (Ksv) for HSA ranged from 3.5 x 104 to 4.6 x 105 L/mol, while for DNA, they ranged from 1.4 x 104 to 5.9 x 104 L/mol. The suppression was classified as weak to strong for HSA and moderate for DNA. The bimolecular suppression constant (Kq) showed values between 6.0 x 1012 and 8.2 x 1013 L/mol/s for HSA and from 1.4 x 1012 to 5.9 x 1012 L/mol/s for DNA, suggesting a static suppression mechanism. Compound PR09 stood out, presenting a binding constant (Ka) greater than 105 L/mol for HSA, indicating a strong interaction. Additionally, PR05, PR06, PR07, and PR09 demonstrated strong interactions with DNA. The values of the number of binding sites (n) indicated that PR01, PR02, and PR09 bind to multiple sites on HSA, while PR04, PR05, PR06, and PR09 interact with more than one site on DNA. All interactions were spontaneous, with ∆G negative. The distance between the compounds and tryptophan on HSA was less than 8 nm, suggesting high energy transfer efficiency. In molecular docking studies, PR05 showed the highest affinity for DNA (-11.15 kcal/mol), while PR09 had the highest affinity for HSA (-10.00 kcal/mol). PR07 exhibited the lowest binding energies for DNA (-8.21 kcal/mol) and for HSA (-7.38 kcal/mol). This study demonstrates that the evaluated compounds have potential as new drug candidates.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132025000100402&lng=en&tlng=enthiosemicarbazoneinteractionmacromolecules. |
| spellingShingle | Keriolaine Lima dos Santos Diego Santa Clara Marques Iris Trindade Jacob Paula Roberta da Silva Dijanah Cota Machado Túlio Ricardo Couto de Lima Souza Jamerson Ferreira de Oliveira Sinara Mônica Vitalino Almeida Iranildo José da Cruz Filho Maria do Carmo Alves de Lima Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies Brazilian Archives of Biology and Technology thiosemicarbazone interaction macromolecules. |
| title | Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies |
| title_full | Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies |
| title_fullStr | Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies |
| title_full_unstemmed | Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies |
| title_short | Preliminary Evaluation of HSA and DNA Interactions with Indole-Thiosemicarbazone Compounds and Molecular Docking Studies |
| title_sort | preliminary evaluation of hsa and dna interactions with indole thiosemicarbazone compounds and molecular docking studies |
| topic | thiosemicarbazone interaction macromolecules. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132025000100402&lng=en&tlng=en |
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