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Short communication, Note

Poboljšanje enzimske proizvodnje cefaleksina upotrebom velikih koncentracija supstrata i uklanjanjem produkata reakcije kompleksiranjem in situ

Dengchao Li ; State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China, University of Science and Technology, CN-200237 Shanghai, PR China
Yewang Zhang ; State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China, University of Science and Technology, CN-200237 Shanghai, PR China
Shiwei Cheng ; State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China, University of Science and Technology, CN-200237 Shanghai, PR China
Qiong Gao ; State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China, University of Science and Technology, CN-200237 Shanghai, PR China
Dongzhi Wei ; State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China, University of Science and Technology, CN-200237 Shanghai, PR China


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Abstract

Primjenom imobilizirane Penicilin-G-acilaze iz bakterije Escherichia coli sintetiziran je cefaleksin (CEX) iz 7-amino-3-deacetoksicefalosporanske kiseline (7-ADCA) i D(-)-fenilglicin-metilnog estera (PGME). Koncentracije supstrata i produkta in situ mogu znatno utjecati na omjer sinteze i hidrolize (S/H) i djelotvornost sinteze cefaleksina. Optimalni omjer enzima i supstrata iznosio je 65 IU/mM 7-ADCA. Velika koncentracija supstrata poboljšala je konverziju 7-ADCA sa 61 na 81 % u procesu bez uklanjanja produkta in situ (ISPR), a s 88 na 98 % u procesu sa ISPR. Cefaleksin je lako uklonjen iz kompleksa CEX/β-naftol, a dobiveni je proizvod imao čistoću od 99 % i ukupni prinos od 70 %.

Keywords

cefaleksin; kompleksiranje; enzimska sinteza; uklanjanje produkata in situ; Penicilin-G-acilaza

Hrčak ID:

30425

URI

https://hrcak.srce.hr/30425

Publication date:

17.11.2008.

Article data in other languages: english

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