Anti-GML (aa 48-158) polyclonal antibody

Hyperpigmentation disorders negatively influence an individual's quality of life and may cause emotional distress. Over the years, various melanogenesis inhibitors (mainly tyrosinase inhibitors) have been developed, most of which with low efficacy or high toxicity. Although metabolic engineering by deviation in the flux of substrate is of considerable interest, trials to develop a melanogenesis inhibitor based on L-tyrosine (L-Tyr) restriction are missing. We propose a novel proteinaceous melanogenesis inhibitor called tyrosine ammonia-lyase (TAL), an enzyme that catalyzes the conversion of L-Tyr top-coumaric acid and ammonia. Since the cell membrane can act as a barrier for intracellular protein delivery, we have covalently conjugated a recombinant TAL enzyme fromRhodobacter sphaeroides(RsTAL) to a trans-activator of transcription (TAT) cell-penetrating peptide (CPP) to afford the intracellular delivery. The heterologously expressed TAT-RsTAL fusion protein was delivered successfully into B16F10 melanocytes as confirmed by the direct fluorescence microscopy with increased intensity from 30 to 180 min. TAT-RsTAL showed sufficient intracellular activity of about 0.83 +/- 0.04 and 0.34 +/- 0.03 nmol center dot mg(-1)center dot s(-1)for the native and inclusion body-extracted conjugates, respectively. The conjugate inhibited melanin biosynthesis in B16F10 cells in a time-dependent manner. Melanin accumulation was inhibited by 12.7 +/- 6.2%, 28.2 +/- 5.7%, and 33.9 +/- 2.9% compared to the nontreated control groups after 24, 48, and 72 hr of incubation, respectively. L-Tyr restriction had no significant effect on the cell viability up to a concentration of 100 mu gml(-1)even after 72 hr. According to the observed hypopigmentary effect of the conjugate in this study, TAT-RsTAL can be suggested as a melanogenesis inhibitor for further investigations.

The objective of this research was to examination the chemical compounds and antimicrobial activity of domesticated Origanum vulgare subsp. viride essential oils from Mashhad and Yazd. Iran. GC and GC-MS analysis revealed that the essential oils of Mashhad and Yazd samples predominantly contain thymol (20.97-21.6 %), 4-terpineol (16.27-15.85 %), gamma-terpinene (7.62-5.46 %), trans-sabinene hydrate (6.11-7.91 %) and p-cymene (4.27-5.69 %). The variations observed between the essential oil compositions were mostly quantitative but also qualitative. The inhibitory effects of the essential oils were tested against 10 phytopathogenic microorganisms, including Xanthomonas citri, Ralstonia solanacearum, Erwinia amylovora, Pectobacterium canotovorum, Xanthomonas oryzae bacteria and Bipolaris sorokiniana. Fusarium oxysporum, Drechslera oryzae, Alternaria alternata and Stemphylium sarcinifirne fungi. The antimicrobial test results indicated that the essential oils had antibacterial and antifungal activities against all of the tested microorganisms. According to the width of the inhibition zone X citri was the most sensitive bacterium to the essential oils with MIC (3.5 mu gmL(-1)) and MBC (5 mu gmL(-1)) in both samples. The most sensitive fungus was D. oryzae with 1 and 0.8 mu gmL(-1) in Mashhad and Yazd essential oil samples. Also the most susceptible fungi with MIC 2.1 mu gmL(-1) were B. sorokiniana in essential oil obtained from Mashhad and S. sarciniforne with MIC 2.2 mu gmL(-1) in the essential oil of Yazd's sample. In conclusion, due to the antimicrobial activities of O. vulgare subsp. viride essential oil, the effectiveness of essential oils against serious plant pathogens is considerable. In this way, the essential oil has a good capacity as an alternative to synthetic products in various industries.