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master's thesis
Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2012. urn:nbn:hr:159:854425
Stanić, Marina
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Food Engineering
Laboratory for Fermentation and Yeast Technology

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Stanić, M. (2012). Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12 (Master's thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:854425

Stanić, Marina. "Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2012. https://urn.nsk.hr/urn:nbn:hr:159:854425

Stanić, Marina. "Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12." Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2012. https://urn.nsk.hr/urn:nbn:hr:159:854425

Stanić, M. (2012). 'Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12', Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 21 December 2024, https://urn.nsk.hr/urn:nbn:hr:159:854425

Stanić M. Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12 [Master's thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2012 [cited 2024 December 21] Available at: https://urn.nsk.hr/urn:nbn:hr:159:854425

M. Stanić, "Utjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12", Master's thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2012. Available at: https://urn.nsk.hr/urn:nbn:hr:159:854425

Metadata
TitleUtjecaj sastava podloge i uvjeta okoline na proizvodnju (S)-adenozil-L-metionina pomoću divljeg soja kvasca Pichia stipitis i mutanta M12
Title (english)Influence of medium composition and environmental conditions on production of (S)-adenosyl-L-methionine by wild strain of Pichia stipitis and mutant strain M12
AuthorMarina Stanić
MentorDamir Stanzer (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Food Engineering)
(Laboratory for Fermentation and Yeast Technology)
Zagreb
Defense date and country2012-11-07, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
(S)-adenozil-L-metionin, poznat kao SAMe, prisutan je u svim stanicama i igra bitnu ulogu u metabolizmu. Sudjeluje u više od sto različitih bioloških reakcija, prvenstveno kao donor metilne skupine. Nastaje od metionina i adenozin-trifosfata djelovanjem enzima metionin-adenoziltransferaze. Nedostatak SAMe u ljudskom organizmu uzrokuje poremećaje u funkcioniranju jetre, živčanog i imunološkog sustava. Komercijalno se proizvodi izolacijom iz kvaščevih stanica koje rastu na hranjivoj podlozi bogatoj L-metioninom. Mutanti dobiveni ultraljubičastim svjetlom i rezistentni na nistatin imaju promijenjen sastav sterola u staničnoj membrani, odnosno mogu nakupljati SAMe koji se ne iskoristi u biosintezi ergosterola. Cilj rada bio je proučiti utjecaj sastava podloge i uvjeta okoline na proizvodnju SAMe pomoću divljeg soja kvasca Pichia stipitis i mutiranog soja M12 pri aerobnom uzgoju u glukoznoj podlozi. Rezultati istraživanja pokazuju da je najveća količina SAMe proizvedena s mutiranim sojem M12 u 48-om satu uzgoja (44,88 mg g-1 s.tv.kvasca) s dodatkom 7,5 gL-1 D,L-metionina, pri temperaturi od 30oC i pH vrijednosti 5.
Abstract (english)
(S)-adenosyl-L-methionine, also known as SAMe, is present in all cells and plays an essential role in metabolism. It participates in more than one hundred different biological reactions, primarily as a methyl group donor. SAMe is synthesized from methionine and adenosine triphosphate (ATP) by methionine adenosyltransferase. Deficiency of SAMe in humans can be manifested through various dysfunctions of liver, immunological and nervous system. SAMe is commercially produced by isolation from yeast cells grown in media with L-methionine. Mutants resistant to nystatin obtained by ultraviolet radiation, have altered sterol composition cellular membrane and can accumulate SAMe that is not utilized in ergosterol biosynthesis. The aim of this work was to determine the influence of medium composition and environmental conditions on the production of SAMe in the wild strain of Pichia stipitis and mutant strain M12 grown aerobicaly in glucose media. The maximal SAMe accumulation was achieved by M12 mutant strain in 48th hour of cultivation (44.88 mg g-1 dry cells) with the addition of 7.5g L-1 D,L-methionine, at temperature of 30° C and pH value 5.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:854425
Study programmeTitle: Food Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka prehrambenog inženjerstva (magistar/magistra inženjer/inženjerka prehrambenog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
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Created on2017-05-09 08:32:26