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Uji potensi antibakteri dan uji keberadaan enzim squalene sintase bakteri endofit rimpang temulawak (Curcuma xanthorrhiza Roxb.)

Ningtyas, Ayu Fidya (2015) Uji potensi antibakteri dan uji keberadaan enzim squalene sintase bakteri endofit rimpang temulawak (Curcuma xanthorrhiza Roxb.). Undergraduate thesis, Universitas Islam Negeri Maulana Malik Ibrahim.

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Abstract

INDONESIA:

Penyakit pada sistem pencernaan yang disebabkan bakteri Bacillus cereus adalah keracunan pada makanan. Penyakit sigelosis disebabkan oleh Shigella dysentriae. Kedua bakteri pathogen virulensinya tinggi sehingga membutuhkan antibakteri yang dapat menghambatnya. Temulawak memiliki senyawa kurkumin, alkaloid, flavonoid, saponin, triterpenoid. Senyawa tersebut dapat dimanfaatkan sebagai antibakteri jadi, diduga bakteri endofitnya juga memiliki senyawa tersebut. Terutama triterpenoid yang ada pada tanaman Curcuma xanthorriza Roxb. Perlu diteliti ada tidaknya triterpenoid dengan melihat enzim penghasil triterpenoid dengan bioinformatika, teknik BLAST.

Penelitian ini merupakan penelitian eksperimen dan eksplorasi. Menguji isolat bakteri endofit rimpang temulawak terhadap bakteri Bacillus cereusdan Shigella dysentriaedengan metode difusi kertas secara in vitro. Analisis data dengan mengukur zona hambatnya. Mengkaji isolat bakteri endofit rimpang temulawak sebagai penghasil enzim squalene sintase dengan bioinformatika. Analisis data dengan melihat persentase query cover ≥ 80% dan identity ≥ 30%.

Hasil uji antibakteri, bakteri endofit rimpang temulawak dapat menghambat bakteri patogen penyebab penyakit pada sistem pencernaanmanusia. Zona hambat terbesar pada isolat Bacillus brevis 13,07mm terhadap bakteri Bacillus cereus dan 14,78 mm terhadapShigella dysentriae. Hasil BLAST menunjukkan sekuen bakteri endofit dengan enzim penghasil triterpenoid tidak homolog sehingga, dinyatakan bakteri endofit tidak memiliki enzim squalene penghasil triterpenoid.

ENGLISH:

Human digestive system disease caused by the bacteria Bacillus cereus is food poisoning. Sigelosis disease is caused by Shigella dysenttriae. Both the high virulence of pathogenic bacteria and thus require antibacterial that can hinder. Wild Ginger has a compound curcumin, alkaloids, flavonoids, saponins, triterpenoids. The compounds can be used as antibacterial so, allegedly the endophitic bacteria also have these compounds,mainly triterpenoids that existed at the plant Curcuma xanthorrhiza Roxb. So, it needs to be examined whether there is triterpenoid to see the enzyme producer triterpenoid with bioinformatics, using BLAST.

This study is experimental research and exploration. Testing of endophytic bacteria isolates ginger rhizome against bacteria Bacillus cereus and Shigella dysenttriae with paper diffusion method in vitro. Analysis of the data is done by measuring the inhibitor zone. Assessing the endophytic bacteria isolates ginger rhizome as a producer of enzymes squalene with bioinformatics. Analysis of the data by looking at the percentage of query cover ≥ 80% and ≥ 30% identity.

Antibacterial test results, ginger rhizome endophytic bacteria can inhibit pathogenic bacteria causing human digestive system diseases. The largest inhibition zone is isolate of Bacillus brevis 13,07mm againts the bacteriaBacillus cereus dan 14,78 mm againts Shigella dysentriae. BLAST results show that the sequence of endophytic bacteria and enzymes are not the same. Therefore, otherwise endophytic bacteria do not have a squalene synthase enzym.

Item Type: Thesis (Undergraduate)
Supervisor: Utami, Ulfah and Syarifah, Umaiyatus
Contributors:
ContributionNameEmail
UNSPECIFIEDUtami, UlfahUNSPECIFIED
UNSPECIFIEDSyarifah, UmaiyatusUNSPECIFIED
Keywords: Bacillus cereus; Shigella dysentriae; Temulawak; antibakteri; Bakteri endofit; Curcuma xanthorrhiza Roxb.; Antibacterial; Bacillus cereus; Shigella dysenttriae; Squalene synthase
Departement: Fakultas Sains dan Teknologi > Jurusan Biologi
Depositing User: Dian Anesti
Date Deposited: 25 Dec 2016 20:28
Last Modified: 25 Dec 2016 20:28
URI: http://etheses.uin-malang.ac.id/id/eprint/5474

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