Tarim Bilimleri Dergisi, cilt.24, sa.2, ss.227-237, 2018 (SCI-Expanded)
Bougainvillea spectabilis Willd. bitkisinden ribozom inaktive eden proteinlerden olan Bouganin antiviral protein (BAP)
geni izole edilerek klonlanmış, ifade edilmiş, antiviral ve antifungal özellikleri araştırılmıştır. Bouganin proteinini kodlayan genin tamamı bitkinin olgun yapraklarından ekstrakte edilen mRNA’dan Reverse Transkripsiyon-PCR
Bouganin antiviral protein (BAP) gene, one of the ribosome inactivating proteins, isolated from Bougainvillea
spectabilis Willd. was cloned, expressed and the antiviral and antifungal activities were investigated. The full-length
bouganin antiviral protein gene was amplifed by reverse transcription-PCR using mRNA as template extracted from
mature leaves. The coding region of bouganin gene was cloned into prokaryotic expression vector pETDuet-1 after
amplifcation with end to end gene specifc primers. The recombinant plasmid was transformed into Escherichia coli
cells BL21(DE3)pLysS and the expression of BAP gene was induced by isopropyl β-D thiogalactopyranoside (IPTG).
Bouganin antiviral protein having a molecular mass of 28 kDa has been isolated from transformed bacterial colonies.
Antiviral activity of bouganin was assayed against Zucchini yellow mosaic virus (ZYMV) by a mechanical inoculation
test. The antifungal activity of purifed recombinant protein was tested against pathogenic and non-pathogenic
Rhizoctonia solani, Trichoderma harzianum, and Fusarium oxysporum fungi using disc diffusion method. The increased
amount of antiviral protein reduced the disease severity caused by ZYMV. The bouganin antiviral protein was inhibited
the growth of R. solani by 30.7% and of T. harzianum by 20% after 72 h compared to control. No growth inhibition was
observed for F. oxyporum. All plants including controls treated with in vitro expressed BAP protein exhibited severe
growth reduction compared with negative control (not treated) plants