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Mitrasinovic PM. On the recognition of Yersinia protein tyrosine phosphatase by carboxylic acid derivatives. J Biomol Struct Dyn 2023; 41:1879-1894. [PMID: 35021965 DOI: 10.1080/07391102.2021.2025148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Some members of Yersinia (Y), a genus of bacteria in the family Yersiniaceae, are pathogenic in humans, causing a range of health problems, from gastrointestinal syndromes to the plague. The Y protein tyrosine phosphatase (PTP) YopH is a crucial virulence determinant, considering the vital roles of PTPs in the intracellular signal transduction pathways and cell cycle control. The structural understanding of YopH as a cellular target in pathogenic conditions caused by Y infection is a prerequisite for designing potent and selective YopH inhibitors. Thus, by using molecular docking simulations, the open and closed conformations of the so-called 'WPD loop' (352-Gly-Asn-Trp-Pro-Asp-Gln-Thr-Ala-Val-Ser-361), located nearby the active site (403-Cys-Arg-Ala-Gly-Val-Gly-Arg-Thr-410) in YopH structure, are shown to be relevant for recognition by carboxylic acid derivatives, and the closed conformation is a more preferable receptor in terms of the quantitative correlation with experimental data. In both cases, aurintricarboxylic acid (ATA) has the greatest affinity to YopH. Consequently, a quantum mechanics/molecular mechanics (QM/MM) molecular model is derived to see into the extent of the ATA-induced open-closed conformational change. Active site residues and the WPD loop, as well as ATA are treated using SCC-DFTB-D (QM level), while the rest of the complex is treated using AMBER force field (MM level). The active/inactive functional behavior of YopH is explored by observing the interaction mode of ATA with the wild-type (wt)/Cys403Ser receptor and evaluating the competitive inhibition parameters. Implications of the present study for experimental research are discussed. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Petar M Mitrasinovic
- Center for Biophysical and Chemical Research, Belgrade Institute of Science and Technology, Belgrade, Serbia
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Bacterial Protein Tyrosine Phosphatases as Possible Targets for Antimicrobial Therapies in Response to Antibiotic Resistance. Antioxidants (Basel) 2022; 11:antiox11122397. [PMID: 36552605 PMCID: PMC9774629 DOI: 10.3390/antiox11122397] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/21/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
The review is focused on the bacterial protein tyrosine phosphatases (PTPs) utilized by bacteria as virulence factors necessary for pathogenicity. The inhibition of bacterial PTPs could contribute to the arrest of the bacterial infection process. This mechanism could be utilized in the design of antimicrobial therapy as adjuvants to antibiotics. The review summaries knowledge on pathogenic bacterial protein tyrosine phosphatases (PTPs) involved in infection process, such as: PTPA and PTPB from Staphylococcus aureus and Mycobacterium tuberculosis; SptP from Salmonella typhimurium; YopH from Yersinia sp. and TbpA from Pseudomonas aeruginosa. The review focuses also on the potential inhibitory compounds of bacterial virulence factors and inhibitory mechanisms such as the reversible oxidation of tyrosine phosphatases.
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Refat MS, Bayazeed A, Katouah H, Shah R, Morad M, Abualnaja M, Alsaigh S, Saad F, El-Metwaly N. In-silico studies for kinetin hormone and its alkaline earth metal ion complexes as anti-aging cosmetics; synthesis, characterization and ability for controlling collagen-inhibitors. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Refat MS, Sedayo AA, Sayqal A, Alharbi A, Katouah HA, Abumelha HM, Alzahrani S, Alkhatib F, Althagafi I, El-Metwaly N. Aurintricarboxylic acid and its metal ion complexes in comparative virtual screening versus Lopinavir and Hydroxychloroquine in fighting COVID-19 pandemic: Synthesis and characterization. INORG CHEM COMMUN 2021; 126:108472. [PMID: 33531865 PMCID: PMC7843113 DOI: 10.1016/j.inoche.2021.108472] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/14/2021] [Accepted: 01/16/2021] [Indexed: 11/21/2022]
Abstract
The salt of Aurintricarboxylic acid (ATA) was utilized in this study to synthesize new alkaline earth metal ion complexes. The analytical results proposed the isolation of mononuclear (Sr+2&Ba+2) and binuclear complexes (Mg+2&Ca+2). These complexes were analyzed by available analytical and spectral techniques. The tetrahedral geometry was suggested for all complexes (SP3) through bidentate binding mode of ligand with each central atom. UV-Vis spectra reveal the influence of L → M charge transfer and the estimated optical band gap mostly appeared close to that for known semiconductors. XRD, SEM and TEM studies were executed for new complexes and reflects the nano-crystallinity and homogeneous morphology. The structural forms of ATA and its complexes were optimized by DFT/B3LYP under 6-31G and LANL2DZ basis sets. The output files (log, chk &fchk) were visualized on program screen and according to numbering scheme, many physical features were obtained. It is worthy to note that, a virtual simulation for the inhibition affinity towards COVID-19 proteins as proactive study before the actual application, was done for ATA and its complexes. This was done in addition to drugs currently applied in curing (Hydroxychloroquine & Lopinavir), for comparison and recommendation. Drug-likeness parameters were obtained to evaluate the optimal pharmacokinetics to ensure efficacy. Furthermore, simulated inhibition for COVID-19 cell-growth, was conducted by MOE-docking module. The negative allosteric binding mode represents good inhibitory behavior of ATA, Ba(II)-ATA complex and Lopinavir only. All interaction outcomes of Hydroxychloroquine drug reflect unsuitability of this drug in treating COVID-19. On the other hand, there is optimism for ATA and Lopinvir behaviors in controlling COVID-19 proliferation.
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Affiliation(s)
- Moamen S Refat
- Department of Chemistry, Collage of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Anas A Sedayo
- Department of X-ray, Maternity and Children Hospital, Ministry of Health, Makkah, Saudi Arabia
| | - Ali Sayqal
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Arwa Alharbi
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Hanadi A Katouah
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Hana M Abumelha
- Department of Chemistry, Faculty of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Seraj Alzahrani
- Department of Chemistry, College of Science, Taibah University, Saudi Arabia
| | - Fatmah Alkhatib
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Ismail Althagafi
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Nashwa El-Metwaly
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
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Olivier EN, Zhang S, Yan Z, Suzuka S, Roberts K, Wang K, Bouhassira EE. PSC-RED and MNC-RED: Albumin-free and low-transferrin robust erythroid differentiation protocols to produce human enucleated red blood cells. Exp Hematol 2019; 75:31-52.e15. [PMID: 31176681 DOI: 10.1016/j.exphem.2019.05.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 01/19/2023]
Abstract
Many methods have been developed to produce cultured red blood cells (cRBCs) in vitro but translational applications have been hampered by high costs of production and by low rates of enucleation. We have developed R6 and IMIT, two chemically defined culture media and combined them into robust erythroid differentiation (RED) protocols to differentiate induced-pluripotent stem cells (iPSCs) and peripheral blood mononuclear cells (MNCs) into enucleated erythroid cells. The RED protocols do not require any albumin or animal components and require ten- to twentyfold less transferrin (Tf) than previously, because iron is provided to the differentiating erythroblasts by small amounts of recombinant Tf supplemented with FeIII-EDTA, an iron chelator that allows Tf recycling to take place in cell culture. Importantly, cRBCs produced by iPSC differentiation using the long PSC-RED protocol enucleate at much higher rates than with previous protocols, eliminating one of the impediments to the use of these cells to produce clinically useful cRBCs. The absence of albumin, the reduced amounts of Tf, the improved reproducibility associated with the elimination of all animal components, and the high yield on the RED protocols decrease the cost of production of cultured red blood cells. RED protocols should therefore help to make translational applications of cultured RBCs more economically realistic.
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Affiliation(s)
- Emmanuel N Olivier
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY
| | - Shouping Zhang
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY
| | - Zi Yan
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY
| | - Sandra Suzuka
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY
| | - Karl Roberts
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY
| | - Kai Wang
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY
| | - Eric E Bouhassira
- Department of Cell Biology and Department of Medicine/Hematology, Albert Einstein College of Medicine, Bronx, NY.
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