*Article* **Exploring the Activity of Fungal Phenalenone Derivatives as Potential CK2 Inhibitors Using Computational Methods**

**Sabrin R. M. Ibrahim 1,2,\* , Alaa A. Bagalagel <sup>3</sup> , Reem M. Diri <sup>3</sup> , Ahmad O. Noor <sup>3</sup> , Hussain T. Bakhsh <sup>3</sup> , Yosra A. Muhammad 4,5, Gamal A. Mohamed <sup>6</sup> and Abdelsattar M. Omar 4,5,7**


**Abstract:** Cancer represents one of the most prevalent causes of global death. CK2 (casein kinase 2) activation boosted cancer proliferation and progression. Therefore, CK2 inhibition can have a crucial role in prohibiting cancer progression and enhancing apoptosis. Fungi have gained vast interest as a wealthy pool of anticancer metabolites that could particularly target various cancer progressionlinked signaling pathways. Phenalenones are a unique class of secondary metabolites that possess diverse bioactivities. In the current work, the CK2 inhibitory capacity of 33 fungal phenalenones was explored using computational studies. After evaluating the usefulness of the compounds as enzyme inhibitors by ADMET prediction, the compounds were prepared for molecular docking in the CK2-α1 crystal structure (PDB: 7BU4). Molecular dynamic simulation was performed on the top two scoring compounds to evaluate their binding affinity and protein stability through a simulated physiological environment. Compound **19** had a superior binding affinity to the co-crystallized ligand (**Y49**). The improved affinity can be attributed to the fact that the aliphatic chain makes additional contact with Asp120 in a pocket distant from the active site.

**Keywords:** phenalenones; fungi; cancer; casein kinase; CK2 inhibitor; molecular docking
