Abstract:
A cationic increment antibiotic peptide produced by cleaving a non-native structure of an analogs peptide derived from ribosomal protein l1 of helicobacter pylori is provided to improve cationic properties while leaving a helical structure of an analogs peptide derived from ribosomal protein l1 of helicobacter pylori. A method for producing a cationic increment antibiotic peptide comprises the following steps of: cleaving 1st~4th amino acids of HPA3(Helicobacter pylori Analogue 3) having an amino acid sequence indicated as sequence number 2; and substituting a positive charge amino acid for the 9th amino acid of glutamic acid and the 13th amino acid of serine. The positive charge amino acid is selected from the group consisting of lysine, arginine, and histidine.
Abstract:
A novel peptide isolated from a novel Bacillus subtilis S1 is provided to show excellent antibiotic effect on harmful fungi and bacteria, thereby being usefully used as an antibacterial and anti-fungal pharmaceutical composition, a pesticide, or a preservative of food, cosmetics or medicines. A Bacillus subtilis S1 having the antibiotics activity is deposited as a deposition no. KCTC 10888BP. A method for purifying a peptide from the Bacillus subtilis comprises the steps of: (a) culturing the Bacillus subtilis S1; (b) after filtering a culture solution obtained from the step(a), loading the filtrate into RP-HPLC(reverse phase-high performance liquid chromatography); (c) eluting proteins to a column of the step(b) using an eluent with gradually increased acetonitrile concentration; and (d) recovering a peak fraction from the eluent and investigating the antibacterial activity thereof. A peptide purified by the method and showing anti-bacterial and anti-fungal activities is characterized in that it is secreted from the Bacillus subtilis S1, has a molecular weight of 1.4-1.6 KDa, and shows antibacterial activity on Rhizoctonia solani and Colletotrichum coccodes. An anti-bacterial and anti-fungal pharmaceutical composition, a biological pesticide or a preservative of foods, cosmetics, or medicines comprises the peptide as an effective ingredient. Further, the concentration of the acetonitrile increases from 5% to 65%.
Abstract:
본 발명은 여드름을 유발하는 것으로 알려진 프로피오니박테리움 아크네스( Propionibacterium acnes ; P. acnes )에 대해 항균 활성을 가지는 항생 펩타이드(HPA3NT3)를 포함하는 항균용 약학적 조성물 및 항균용 화장료 조성물에 관한 것으로, 더욱 구체적으로는 헬리코박터 파이로리로부터 유래한 HP(2-20) 펩타이드의 16번째 아미노산인 글루타민과 18번째 아미노산인 아스파르트산을 트립토판으로 치환한 유사체 HPA3 펩타이드에서 양이온을 증가시키기 위하여 9번째 글루탐산과 13번째 세린을 라이신으로 치환한 뒤 구조적으로 불규칙한 N-말단 부위의 아미노산 4개를 절단한 서열번호 3의 아미노산 서열을 갖는 양친매성 항생 HPA3NT3 펩타이드는 프로피오니박테리움 아크네스에 대해 항균 활성을 가지며, 이로 인해 유발된 홍반, 염증 반응 및 균주의 생장을 억제하고, 사이토카인인 IL-8의 mRNA 발현 및 분비를 억제하는 활성을 가짐으로써 항균용 약학적 조성물 및 항균용 화장료 조성물의 유효성분으로 유용하게 사용될 수 있다.
Abstract:
본 발명은 항적조 활성을 갖는 HPA3NT3로 기재되는 항적조 펩타이드를 적조로부터 분리된 CsNIV에 탑재하는 것에 관한 것이며, 구체적으로 탁월한 항조류 활성을 나타내고, 세포 독성이 없으며, 자연 분해가 가능하며, 수용성인 HPA3NT3 펩타이드를 CsNIV 캡시드에 탑재함으로써, 상기 수용성인 HPA3NT3 펩타이드가 바닷물에서 쉽게 녹아버리는 단점을 보완하였으므로, HPA3NT3 펩타이드-CsNIV 캡시드 복합체를 유효성분으로 함유하는 적조 방제제를 해양생태계에 안전하고 유용하게 사용할 수 있다.
Abstract:
The present invention relates to novel antifungal peptide PG-2 derived from Solanum tuberosum L. cv. Gogu valley and a use thereof. More specifically, a novel peptide with an amino acid sequence in sequence number 1 which is separated from the Solanum tuberosum L. cv. Gogu valley of the present invention has remarkable antibacterial and antifungal effects, and has no cytotoxicity. The novel peptide is capable of being used as an antibacterial or antifungal pharmaceutical composition, a cosmetic composition, an agricultural chemical, a food preservative, a cosmetic preservative, and a medical preservative.