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:
PURPOSE: An antibiotic peptide is provided to have excellent antibacterial activity against Escherichia coli or Staphylococcus aureus and to show thermal stability, thereby being used as an active ingredient of an antibacterial and antiseptic composition. CONSTITUTION: An antibiotic peptide has an amino acid sequence of sequence number 1 or 2. The antibiotic peptide is isolated from Nordotis discus discus and has thermal stability. An antibacterial or antiseptic composition contains the antibiotic peptide as an active ingredient. An antibacterial pharmaceutical composition contains the antibiotic peptide as an active ingredient. An antibacterial cosmetic composition contains the antibiotic peptide as an active ingredient.
Abstract:
본 발명은 생물체 유래의 천연 항적조 펩타이드에 관한 것으로서, 보다 구체적으로 본 발명에 따른 HPA3NT3 펩타이드는 탁월한 항적조 활성을 나타내며, 이러한 항적조 활성은 적조유발 생물에만 선택적으로 나타나며, 자연 분해가 가능하며, 세포 독성이 없으므로 해양 생태계에 안전하고 유용한 항적조제로써 사용될 수 있다.
Abstract:
PURPOSE: An anti-red tide peptide P5 with anti-red tidal activity is provided to ensure excellent red tidal activity without toxicity. CONSTITUTION: A P5 peptide has an amino acid sequence of sequence number 2. The P5 peptide is a peptide or derivative with enhanced positive charge and hydrophobic region by substituting one or more amino acids of CA-MA(crecropinA-magainin 2) peptide of sequence number 1. The P5 peptide has an anti-red tidal activity to C. polykrikoides, C. marina, or H. akashiwo. An anti-red tidal composition contains P5 peptides as an active ingredient.
Abstract:
PURPOSE: A ribosomal protein L1(RPL1)-derived novel antibiotics peptide of helicobacter pylori is provided to ensure high antibacterial activity to gram positive bacterial and gram negative bacteria. CONSTITUTION: An antibiotics peptide with reduced citotoxicity is obtained by substituting phenylalanine of site 1 and 8 in an antibiotics peptide of sequence number 1 with alanine. The antibiotics peptide is denoted by sequence number 2. An antibiotics having antibacterial activity to gram-positive bacteria or gram-negative bacteria contains the antibiotics peptide as an active ingredient. A food additive or food supplement contains the antibiotic peptide as an active ingredient.
Abstract:
본 발명은 신규 분리, 동정한 바실러스 서브틸리스 에스원( Bacillus subtilis S1 ), 이로부터 분리한 신규 펩타이드 및 이의 용도에 관한 것으로서, 구체적으로는 토양으로부터 분리, 동정한 신균주인 바실러스 서브틸리스 에스원( Bacillus subtilis S1 ), 이로부터 분리 정제한 항진균용 신규 펩타이드인 S1-14, S1-19, S1-23 및 이의 용도에 관한 것이다. 본 발명의 신규 펩타이드인 S1-14, S1-19 및 S1-23은 항진균 활성이 우수하고 독성이 없으므로 항균제, 항진균제 뿐 아니라 생물농약, 기능성 화장품, 화장품 보존제, 식품 또는 의약품 보존제로 유용하게 사용될 수 있다. 항생제, 농약, 기능성 화장품
Abstract:
PURPOSE: An organism-derived natural anti-red tidal peptide HPA3NT3 is provided to ensure selective anti-red tidal activity without cytotoxicity. CONSTITUTION: An HPA3NT3 peptide has an amino acid sequence of sequence number 3. The HPA3NT3 peptide has a sequence in which 9th amino acid, glutamic acid(Glu) and 13th amino acid, serine of HPA3 peptide of sequence number 2 are substituted. The HPA3NT3 peptide has an anti-red tidal activity to C. polykrikoides, C. marina, or H. akashiwo. An anti-red tidal composition contains the HPA3NT3 peptide as an active ingredient.