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Acosta J, Del Arco J, Del Pozo ML, Herrera-Tapias B, Clemente-Suárez VJ, Berenguer J, Hidalgo A, Fernández-Lucas J. Hypoxanthine-Guanine Phosphoribosyltransferase/adenylate Kinase From Zobellia galactanivorans: A Bifunctional Catalyst for the Synthesis of Nucleoside-5'-Mono-, Di- and Triphosphates. Front Bioeng Biotechnol 2020; 8:677. [PMID: 32671046 PMCID: PMC7326950 DOI: 10.3389/fbioe.2020.00677] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/01/2020] [Indexed: 01/13/2023] Open
Abstract
In our search for novel biocatalysts for the synthesis of nucleic acid derivatives, we found a good candidate in a putative dual-domain hypoxanthine-guanine phosphoribosyltransferase (HGPRT)/adenylate kinase (AMPK) from Zobellia galactanivorans (ZgHGPRT/AMPK). In this respect, we report for the first time the recombinant expression, production, and characterization of a bifunctional HGPRT/AMPK. Biochemical characterization of the recombinant protein indicates that the enzyme is a homodimer, with high activity in the pH range 6-7 and in a temperature interval from 30 to 80°C. Thermal denaturation experiments revealed that ZgHGPRT/AMPK exhibits an apparent unfolding temperature (Tm) of 45°C and a retained activity of around 80% when incubated at 40°C for 240 min. This bifunctional enzyme shows a dependence on divalent cations, with a remarkable preference for Mg2+ and Co2+ as cofactors. More interestingly, substrate specificity studies revealed ZgHGPRT/AMPK as a bifunctional enzyme, which acts as phosphoribosyltransferase or adenylate kinase depending upon the nature of the substrate. Finally, to assess the potential of ZgHGPRT/AMPK as biocatalyst for the synthesis of nucleoside-5′-mono, di- and triphosphates, the kinetic analysis of both activities (phosphoribosyltransferase and adenylate kinase) and the effect of water-miscible solvents on enzyme activity were studied.
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Affiliation(s)
- Javier Acosta
- Applied Biotechnology Group, Universidad Europea de Madrid, Urbanización El Bosque, Madrid, Spain
| | - Jon Del Arco
- Applied Biotechnology Group, Universidad Europea de Madrid, Urbanización El Bosque, Madrid, Spain
| | | | - Beliña Herrera-Tapias
- Grupo de Investigación en Ciencias Naturales y Exactas, GICNEX, Universidad de la Costa, CUC, Barranquilla, Colombia
| | - Vicente Javier Clemente-Suárez
- Grupo de Investigación en Ciencias Naturales y Exactas, GICNEX, Universidad de la Costa, CUC, Barranquilla, Colombia.,Faculty of Sport Sciences, Universidad Europea de Madrid, Urbanización El Bosque, Madrid, Spain
| | - José Berenguer
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Aurelio Hidalgo
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Jesús Fernández-Lucas
- Applied Biotechnology Group, Universidad Europea de Madrid, Urbanización El Bosque, Madrid, Spain.,Grupo de Investigación en Ciencias Naturales y Exactas, GICNEX, Universidad de la Costa, CUC, Barranquilla, Colombia
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Sinitsyna EV, Timofeev VI, Tuzova ES, Kostromina MA, Murav’eva TI, Esipov RS, Kuranova IP. Crystallization and preliminary X-ray diffraction study of recombinant adenine phosphoribosyltransferase from the thermophilic bacterium Thermus thermophilus strain HB27. CRYSTALLOGR REP+ 2017. [DOI: 10.1134/s106377451704023x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Crespillo J, Llorente P, Argomániz L, Montero C. APRT from erythrocytes of HGPRT deficient patients: kinetic, regulatory and thermostability properties. Mol Cell Biochem 2004; 254:359-63. [PMID: 14674717 DOI: 10.1023/a:1027323521969] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Adenine phosphoribosyltransferase (APRT) has been 1200-fold purified from erythrocytes of a patient with partial hipoxanthine-guanine phosphoribosyltransferase (HGPRT) deficiency, Propositus, and in those of a controlHPRT+, with 20% efficiency in both proteins and specific activity of 550 and 243 nmol/h/mgprotein. The specific activity determined in the Propositus enzyme was, in all purification steps, higher than that of the controlHPRT+. Significant changes were found in their thermal stabilities. Half inactivation times at each temperature studied are greater for the Propositus enzyme in the temperature interval 60-80 degrees C. No significant difference has been observed in the affinity constants for adenine and PRPP substrates. Studies on inhibition by the reaction product suggest that AMP is a competitive inhibitor with respect to PRPP in both enzymes, with Ki values of 150 microM in Propositus and 220 microM in controlHPRT+.
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Montero C, Llorente P, Argomaniz L, Menendez M. Thermal stability of Artemia HGPRT: effect of substrates on inactivation kinetics. Int J Biol Macromol 1996; 18:255-62. [PMID: 8739129 DOI: 10.1016/0141-8130(95)01082-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Hypoxanthine-guanine phosphoribosyltransferase (HGPRT, E.C.2.4.2.8) from Artemia cysts exhibits maximum activity at 70 degrees C. Its thermal stability has been examined following enzymatic activity as a function of temperature. Cold-induced renaturation experiments of samples heated at increasing temperatures showed that reversibility of thermal inactivation depends on the incubation time and final temperature. Prolonged incubation of the thermoinactivated enzyme at 0 degree C did not afford any further increase of the catalytic activity at 37 degrees C. The complex substrate PRPP:Mg protects HGPRT from thermal inactivation. However, incubations with hypoxanthine rendered a less thermostable enzyme at any temperature tested. The irreversible inactivation of HGPRT proceeds in two exponential steps. The analysis of the apparent rate constants for the fast and the slow phases, lambda 1 and lambda 2 as per the Lumry and Eyring model suggests the existence of more than three states in the thermal denaturation pathway of the free enzyme. In the presence of PRPP:Mg the irreversible process follows a single exponential and proceeds very slowly below 70 degrees C. PRPP:Mg also protects the enzyme from inactivation by NEM and pCMB, suggesting that -SH groups may be in the vicinity of the active site.
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Affiliation(s)
- C Montero
- Instituto de Investigaciones Biomedicas del Consejo Superior de Investigaciones Cientificas, (C.S.I.C), Madrid, Spain
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Rotllan P, Liras A, Llorente P. Salvage and interconversion of purines in developing Artemia. BIOCHIMICA ET BIOPHYSICA ACTA 1993; 1156:128-34. [PMID: 8427871 DOI: 10.1016/0304-4165(93)90127-t] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Incorporation of the radiolabelled purine bases adenine, guanine and hypoxanthine into acid soluble fraction, RNA and DNA nucleotides during the early larval development of Artemia sp. was studied. Adenine was the best precursor and guanine the poorest. The adenine phosphoribosyltransferase (APRT) activity was considerably higher than that of hypoxanthine-guanine phosphoribosyltransferase (HGPRT) and these activities did not significantly change throughout larval development. The pattern of purine interconversion was dependent on naupliar age. Conversion of [14C]adenine and [14C]hypoxanthine into guanine nucleotides increased with time of development. However, the conversion of [14C]guanine into [14C]adenine nucleotides was very low.
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Affiliation(s)
- P Rotllan
- Instituto de Investigaciones Biomédicas del C.S.I.C., Madrid, Spain
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