Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization
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2015
Authors
Prodanović, Olivera
Spasojević, Dragica

Prokopijević, Miloš

Radotić, Ksenija

Marković, Nevena

Blazic, Marija

Prodanović, Radivoje

Article (Published version)

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Phenol and amino groups were introduced into alginate to different degrees via oxidation with 2.5, 5, 10, 15 and 20 mol% of periodate and reductive amination by tyramine. Modification of alginate with tyramine was confirmed by FTIR spectroscopy and UV-VIS spectroscopy, while concentration of phenol and ionizable groups was determined using absorbance at 275 nm and acid-base titration. All tyramine-alginates were able to form hydrogels after cross-linking with horse radish peroxidase (HRP) and hydrogen peroxide. Tyramine-alginates oxidized with up to 10 mol% of periodate were also capable of forming hydrogels with calcium ions. Tyramine-alginates were tested for HRP immobilization within micro-beads obtained by peroxidase catalyzed droplet polymerization using internal delivery of hydrogen peroxide via glucose oxidase and glucose. Highest activity of immobilized peroxidase was obtained with 20% (w/v) tyramine-alginate obtained via 20 mol% periodate oxidation. Immobilized enzyme was not ...leaking from the micro-beads and was further kinetically characterized for pyrogallol oxidation. Km for pyrogallol was increased after immobilization from 1.93 mM for soluble HRP to 734 mM for immobilized HRP. The optimum pH was also increased from pH 7.0 to 8.0. Temperature and organic solvent stability improved significantly after immobilization, so that half-life at 70 degrees C increased around four times, while half-life in 80% (v/v) dioxane increased 22 times. After repeated use of 6 times in batch reactor for pyrogallol oxidation immobilized HRP retained 45% of original activity.
Keywords:
Tyramine / Polymerization / Peroxide / Hydrogel / EmulsionSource:
Reactive & Functional Polymers, 2015, 93, 77-83Publisher:
- Elsevier Science Bv, Amsterdam
Funding / projects:
- Study of structure-function relationships in the plant cell wall and modifications of the wall structure by enzyme engineering (RS-173017)
- Allergens, antibodies, enzymes and small physiologically important molecules: design, structure, function and relevance (RS-172049)
DOI: 10.1016/j.reactfunctpolym.2015.06.004
ISSN: 1381-5148
WoS: 000360869200009
Scopus: 2-s2.0-84935909709
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Institut za multidisciplinarna istraživanjaTY - JOUR AU - Prodanović, Olivera AU - Spasojević, Dragica AU - Prokopijević, Miloš AU - Radotić, Ksenija AU - Marković, Nevena AU - Blazic, Marija AU - Prodanović, Radivoje PY - 2015 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/841 AB - Phenol and amino groups were introduced into alginate to different degrees via oxidation with 2.5, 5, 10, 15 and 20 mol% of periodate and reductive amination by tyramine. Modification of alginate with tyramine was confirmed by FTIR spectroscopy and UV-VIS spectroscopy, while concentration of phenol and ionizable groups was determined using absorbance at 275 nm and acid-base titration. All tyramine-alginates were able to form hydrogels after cross-linking with horse radish peroxidase (HRP) and hydrogen peroxide. Tyramine-alginates oxidized with up to 10 mol% of periodate were also capable of forming hydrogels with calcium ions. Tyramine-alginates were tested for HRP immobilization within micro-beads obtained by peroxidase catalyzed droplet polymerization using internal delivery of hydrogen peroxide via glucose oxidase and glucose. Highest activity of immobilized peroxidase was obtained with 20% (w/v) tyramine-alginate obtained via 20 mol% periodate oxidation. Immobilized enzyme was not leaking from the micro-beads and was further kinetically characterized for pyrogallol oxidation. Km for pyrogallol was increased after immobilization from 1.93 mM for soluble HRP to 734 mM for immobilized HRP. The optimum pH was also increased from pH 7.0 to 8.0. Temperature and organic solvent stability improved significantly after immobilization, so that half-life at 70 degrees C increased around four times, while half-life in 80% (v/v) dioxane increased 22 times. After repeated use of 6 times in batch reactor for pyrogallol oxidation immobilized HRP retained 45% of original activity. PB - Elsevier Science Bv, Amsterdam T2 - Reactive & Functional Polymers T1 - Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization EP - 83 SP - 77 VL - 93 DO - 10.1016/j.reactfunctpolym.2015.06.004 ER -
@article{ author = "Prodanović, Olivera and Spasojević, Dragica and Prokopijević, Miloš and Radotić, Ksenija and Marković, Nevena and Blazic, Marija and Prodanović, Radivoje", year = "2015", abstract = "Phenol and amino groups were introduced into alginate to different degrees via oxidation with 2.5, 5, 10, 15 and 20 mol% of periodate and reductive amination by tyramine. Modification of alginate with tyramine was confirmed by FTIR spectroscopy and UV-VIS spectroscopy, while concentration of phenol and ionizable groups was determined using absorbance at 275 nm and acid-base titration. All tyramine-alginates were able to form hydrogels after cross-linking with horse radish peroxidase (HRP) and hydrogen peroxide. Tyramine-alginates oxidized with up to 10 mol% of periodate were also capable of forming hydrogels with calcium ions. Tyramine-alginates were tested for HRP immobilization within micro-beads obtained by peroxidase catalyzed droplet polymerization using internal delivery of hydrogen peroxide via glucose oxidase and glucose. Highest activity of immobilized peroxidase was obtained with 20% (w/v) tyramine-alginate obtained via 20 mol% periodate oxidation. Immobilized enzyme was not leaking from the micro-beads and was further kinetically characterized for pyrogallol oxidation. Km for pyrogallol was increased after immobilization from 1.93 mM for soluble HRP to 734 mM for immobilized HRP. The optimum pH was also increased from pH 7.0 to 8.0. Temperature and organic solvent stability improved significantly after immobilization, so that half-life at 70 degrees C increased around four times, while half-life in 80% (v/v) dioxane increased 22 times. After repeated use of 6 times in batch reactor for pyrogallol oxidation immobilized HRP retained 45% of original activity.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Reactive & Functional Polymers", title = "Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization", pages = "83-77", volume = "93", doi = "10.1016/j.reactfunctpolym.2015.06.004" }
Prodanović, O., Spasojević, D., Prokopijević, M., Radotić, K., Marković, N., Blazic, M.,& Prodanović, R.. (2015). Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization. in Reactive & Functional Polymers Elsevier Science Bv, Amsterdam., 93, 77-83. https://doi.org/10.1016/j.reactfunctpolym.2015.06.004
Prodanović O, Spasojević D, Prokopijević M, Radotić K, Marković N, Blazic M, Prodanović R. Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization. in Reactive & Functional Polymers. 2015;93:77-83. doi:10.1016/j.reactfunctpolym.2015.06.004 .
Prodanović, Olivera, Spasojević, Dragica, Prokopijević, Miloš, Radotić, Ksenija, Marković, Nevena, Blazic, Marija, Prodanović, Radivoje, "Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization" in Reactive & Functional Polymers, 93 (2015):77-83, https://doi.org/10.1016/j.reactfunctpolym.2015.06.004 . .