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Sierra-López F, Baylón-Pacheco L, Vanegas-Villa SC, Rosales-Encina JL. Characterization of low molecular weight protein tyrosine phosphatases of Entamoeba histolytica. Biochimie 2021; 180:43-53. [PMID: 33122104 DOI: 10.1016/j.biochi.2020.10.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/20/2020] [Accepted: 10/24/2020] [Indexed: 12/12/2022]
Abstract
Entamoeba histolytica is an intestinal protozoan parasite of humans and is endemic in developing countries. E. histolytica has two low molecular weight protein tyrosine phosphatase (LMW-PTP) genes, EhLMW-PTP1 and EhLMW-PTP2, which are expressed in cultured trophozoites, clinical isolates, and cysts. The amino acid sequences of proteins EhLMW-PTP1 and EhLMW-PTP2 showed only one amino acid difference between them at position A85V, respectively. Both genes are expressed in cultured trophozoites, mainly EhLMW-PTP2, and in trophozoites recovered from amoebic liver abscess, the expression of EhLMW-PTP1 is downregulated. We cloned the two genes and purified the corresponding recombinant (rEhLMW-PTPs) proteins. Antibodies anti-rEhLMW-PTP2 showed that during red blood cells uptake by E. histolytica, the EhLMW-PTPs were found in the phagocytic cups based on analysis of fluorescence signals. On the other hand, rEhLMW-PTPs showed an optimum phosphatase activity at pH 6.0 with p-nitrophenyl phosphate as the substrate. They dephosphorylate phosphotyrosine and 3-O-methylfluorescein phosphate, but not phosphoserine or phosphothreonine, and the enzymatic activity is inhibited by orthovanadate. rEhLMW-PTP1 and rEhLMW-PTP2 exhibited optimum temperatures of activities at 60 °C and 58 °C, respectively, with high thermal stability at 50 °C. Also, the rEhLMW-PTPs showed high specific activities and specific km value with pNPP or OMFP as the substrates at the physiological temperature (37 °C).
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Affiliation(s)
- Francisco Sierra-López
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del I.P.N., Ciudad de México, Mexico.
| | - Lidia Baylón-Pacheco
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del I.P.N., Ciudad de México, Mexico.
| | - Sonia Cynthia Vanegas-Villa
- Programa de Doctorado en Ciencias Biomédicas, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de, Mexico.
| | - José Luis Rosales-Encina
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del I.P.N., Ciudad de México, Mexico.
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2
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Sánchez-Rodríguez R, González GM, Becerril-García MA, Treviño-Rangel RDJ, Marcos-Vilchis A, González-Pedrajo B, Valvano MA, Andrade A. The BPtpA protein from Burkholderia cenocepacia belongs to a new subclass of low molecular weight protein tyrosine phosphatases. Arch Biochem Biophys 2020; 681:108277. [PMID: 31978399 DOI: 10.1016/j.abb.2020.108277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/15/2020] [Accepted: 01/17/2020] [Indexed: 11/24/2022]
Abstract
Low molecular weight protein tyrosine phosphatases (LMW-PTP) are ubiquitous enzymes found across a spectrum of genera from prokaryotes to higher eukaryotes. LMW-PTP belong to the Cys-based PTP class II protein family. Here, we show that LMW-PTP can be categorized into two different groups, referred as class II subdivision I (class II.I) and subdivision II (class II.II). Using BPtpA from the opportunistic pathogen Burkholderia cenocepacia, as a representative member of the LMW-PTP class II.I, we demonstrated that four conserved residues (W47, H48, D80, and F81) are required for enzyme function. Guided by an in silico model of BPtpA, we show that the conserved residues at α3-helix (D80 and F81) contribute to protein stability, while the other conserved residues in the W-loop (W47 and H48) likely play a role in substrate recognition. Overall, our results provide new information on LMW-PTP protein family and establish B. cenocepacia as a suitable model to investigate how substrates are recognized and sorted by these proteins.
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Affiliation(s)
- Rebeca Sánchez-Rodríguez
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología. Monterrey, Nuevo León, 64460, Mexico
| | - Gloria M González
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología. Monterrey, Nuevo León, 64460, Mexico
| | - Miguel A Becerril-García
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología. Monterrey, Nuevo León, 64460, Mexico
| | - Rogelio de J Treviño-Rangel
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología. Monterrey, Nuevo León, 64460, Mexico
| | - Arely Marcos-Vilchis
- Departamento de Genética Molecular, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, 70-243, Mexico
| | - Bertha González-Pedrajo
- Departamento de Genética Molecular, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, 70-243, Mexico
| | - Miguel A Valvano
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, BT9 7BL, United Kingdom
| | - Angel Andrade
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología. Monterrey, Nuevo León, 64460, Mexico.
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Herrera-Rueda MÁ, Tlahuext H, Paoli P, Giacoman-Martínez A, Almanza-Pérez JC, Pérez-Sánchez H, Gutiérrez-Hernández A, Chávez-Silva F, Dominguez-Mendoza EA, Estrada-Soto S, Navarrete-Vazquez G. Design, synthesis, in vitro, in vivo and in silico pharmacological characterization of antidiabetic N-Boc-l-tyrosine-based compounds. Biomed Pharmacother 2018; 108:670-678. [PMID: 30245467 DOI: 10.1016/j.biopha.2018.09.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 09/12/2018] [Accepted: 09/12/2018] [Indexed: 11/16/2022] Open
Abstract
In this study, we synthesized five N-Boc-L-tyrosine-based analogues to glitazars. The in vitro effects of compounds 1-5 on protein tyrosine phosphatase 1B (PTP-1B), peroxisome proliferator-activated receptor alpha and gamma (PPARα/γ), glucose transporter type-4 (GLUT-4) and fatty acid transport protein-1 (FATP-1) activation are reported in this paper. Compounds 1 and 3 were the most active in the in vitro PTP-1B inhibition assay, showing IC50s of approximately 44 μM. Treatment of adipocytes with compound 1 increased the mRNA expression of PPARγ and GLUT-4 by 8- and 3-fold, respectively. Moreover, both compounds (1 and 3) also increased the relative mRNA expression of PPARα (by 8-fold) and FATP-1 (by 15-fold). Molecular docking studies were performed in order to elucidate the polypharmacological binding mode of the most active compounds on these targets. Finally, a murine model of hyperglycemia was used to evaluate the in vivo effectiveness of compounds 1 and 3. We found that both compounds are orally active using an exploratory dose of 100 mg/kg, decreasing the blood glucose concentration in an oral glucose tolerance test and a non-insulin-dependent diabetes mellitus murine model. In conclusion, we demonstrated that both molecules showed strong in vitro and in vivo effects and can be considered polypharmacological antidiabetic candidates.
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Affiliation(s)
| | - Hugo Tlahuext
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, 62209, Mexico
| | - Paolo Paoli
- Dipartimento di Scienze Biomediche Sperimentali e Cliniche, Sezione di Scienze Biochimiche, Università degli Studi di Firenze, Viale Morgagni 50, 50134, Firenze, Italy
| | - Abraham Giacoman-Martínez
- Laboratorio de Farmacologia, Depto. Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, México, D.F. 09340, Mexico
| | - Julio César Almanza-Pérez
- Laboratorio de Farmacologia, Depto. Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, México, D.F. 09340, Mexico
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica de Murcia (UCAM), E30107, Murcia, Spain
| | | | - Fabiola Chávez-Silva
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico
| | | | - Samuel Estrada-Soto
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico
| | - Gabriel Navarrete-Vazquez
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico.
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Hidalgo-Figueroa S, Estrada-Soto S, Ramírez-Espinosa JJ, Paoli P, Lori G, León-Rivera I, Navarrete-Vázquez G. Synthesis and evaluation of thiazolidine-2,4-dione/benzazole derivatives as inhibitors of protein tyrosine phosphatase 1B (PTP-1B): Antihyperglycemic activity with molecular docking study. Biomed Pharmacother 2018; 107:1302-1310. [PMID: 30257345 DOI: 10.1016/j.biopha.2018.08.124] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 08/18/2018] [Accepted: 08/23/2018] [Indexed: 01/30/2023] Open
Abstract
This work presents the synthesis of two hybrid compounds (1 and 2) with thiazolidine-2,4-dione structure as a central scaffold which were further screened in combo (in vitro as PTP-1B inhibitors, in vivo antihyperglycemic activity, in silico toxicological profile and molecular docking). Compound 1 was tested in the enzymatic assay showing an IC50 = 9.6 ± 0.5 μM and compound 2 showed about a 50% of inhibition of PTP-1B at 20 μM. Therefore, compound 1 was chosen to test its antihyperglycemic effect in a rat model for non-insulin-dependent diabetes mellitus (NIDDM), which was determined at 50 mg/kg in a single dose. The results indicated that compound showed a significant decrease of plasma glucose levels that reached 34%, after a 7 h post-administration. Molecular docking was employed to study the inhibitory properties of thiazolidine-2,4-dione derivatives against Protein Tyrosine Phosphatase 1B (PDB ID: 1c83). Concerning to the two binding sites in this enzyme (sites A and B), compound 1 has shown the best docking score, which indicates the highest affinity. Finally, compounds 1 and 2 have demonstrated an in silico satisfactory pharmacokinetic profile. This shows that it could be a very good candidate or leader for new series of compounds with this central scaffold.
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Affiliation(s)
- Sergio Hidalgo-Figueroa
- CONACyT, IPICYT/ Consorcio de Investigación, Innovación y Desarrollo para las Zonas Áridas, Camino a la presa San José 2055, Lomas 4a secc., San Luis Potosí, 78216, Mexico.
| | - Samuel Estrada-Soto
- Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico
| | | | - Paolo Paoli
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", Florence, Italy
| | - Giulia Lori
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", Florence, Italy
| | - Ismael León-Rivera
- Centro de Investigaciones Químicas, IICBA, UAEM, Cuernavaca, Morelos, Mexico
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Kuznetsov VI, Hengge AC. New functional aspects of the atypical protein tyrosine phosphatase VHZ. Biochemistry 2013; 52:8012-25. [PMID: 24073992 DOI: 10.1021/bi400776z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
LDP3 (VHZ) is the smallest classical protein tyrosine phosphatase (PTP) known to date and was originally misclassified as an atypical dual-specificity phosphatase. Kinetic isotope effects with steady-state and pre-steady-state kinetics of VHZ and mutants with p-nitrophenol phosphate have revealed several unusual properties. VHZ is significantly more active than previously reported but remains one of the least active PTPs. Highly unusual for a PTP, VHZ possesses two acidic residues (E134 and D65) in the active site. D65 occupies the position corresponding to the typical general acid in the PTP family. However, VHZ primarily utilizes E134 as the general acid, with D65 taking over this role when E134 is mutated. This unusual behavior is facilitated by two coexisting, but unequally populated, substrate binding modes. Unlike most classical PTPs, VHZ exhibits phosphotransferase activity. Despite the presence of the Q-loop that normally prevents alcoholysis of the phosphoenzyme intermediate in other classical PTPs, VHZ readily phosphorylates ethylene glycol. Although mutations of Q-loop residues affect this phosphotransferase activity, mutations on the IPD loop that contains the general acid exert more control over this process. A single P68V substitution on this loop completely abolishes phosphotransferase activity. The ability of native VHZ to catalyze transphosphorylation may lead to an imbalance of intracellular phosphorylation, which could explain the correlation of its overexpression with several types of cancer.
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Affiliation(s)
- Vyacheslav I Kuznetsov
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
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Current awareness on yeast. Yeast 2007. [DOI: 10.1002/yea.1454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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