摘要:
The invention concerns a method for identifying peptides presumed to have a specific function selected among nucleotide or peptide sequences of unknown function, comprising steps which consist in: (i) providing a polynucleotide or polypeptide databank; (ii) screening said databank to search for the presence of a combination of nucleotides or amino acids signalling the peptide with specific function; (iii) identifying the polynucleotide or polypeptide sequences which comprise the combination of nucleotides or amino acids signalling the peptide with specific function.
摘要:
The present disclosure relates to A a continuous, solvent-free and non-enzymatic method for synthesizing a compound of formula (I) :
Ra-POLYPEP-Rc (I)
wherein : POLYPEP is a poly-amino acid compound, Ra and Rc are as specified in the disclosure, which method comprises the steps of: a) feeding an extrusion reactor with (1) a compound of formula (II)
Ra-PEPNt-Rg (II)
wherein; PEPNt is a mono- or a poly-aminoacid compound, Ra and Rg are as specified in the disclosure, and (2) a compound of formula (III)
H-PEPCt-Rc (III)
wherein : PEPCt is a mono- or a poly-amino acid compound, and Rc is as defined in the disclosure in the absence of any solvent, so that the compound of formula (II) and the compound of formula (III) react together for generating a compound of formula (I), and
b) collecting the compound of formula (I) from the extrusion reactor.
摘要:
The present invention relates to new biopolymer, i.e. bioorganic nylons incorporating peptidic blocks obtained by a process of polymerization of amino peptidic blocks. The process of the invention comprises the steps of mixingamino peptidic blocks with or without a diaminoalcane and reacting the mixture according to polycondensation with a diacyl chloride in homogeneous or heterogeneous media.
摘要:
The invention relates to oligopeptides used as elicitors of the natural defences of plants in order to control fungal and/or bacterial and/or viral pathogens and/or crop pests, by means of foliar or root application or by injection. According to the invention, said oligopeptides are characterised in that they are obtained by organic or enzymatic synthesis, in that they are heteropolymers and/or homopolymers of protein and/or non-protein amino acids, and in that said amino acids form sequences of said polymers selected for the capacity thereof to form spiral structures.
摘要:
The invention relates to oligopeptides used as elicitors of the natural defences of plants in order to control fungal and/or bacterial and/or viral pathogens and/or crop pests, by means of foliar or root application or by injection. According to the invention, said oligopeptides are characterised in that they are obtained by organic or enzymatic synthesis, in that they are heteropolymers and/or homopolymers of protein and/or non-protein amino acids, and in that said amino acids form sequences of said polymers selected for the capacity thereof to form spiral structures.
摘要:
The invention concerns a method for identifying peptides presumed to have a specific function selected among nucleotide or peptide sequences of unknown function, comprising steps which consist in: (i) providing a polynucleotide or polypeptide databank; (ii) screening said databank to search for the presence of a combination of nucleotides or amino acids signalling the peptide with specific function; (iii) identifying the polynucleotide or polypeptide sequences which comprise the combination of nucleotides or amino acids signalling the peptide with specific function.
摘要:
The invention relates to a peptide of formula W-DPhe-Arg- Z (I) and to a conjugate thereof of a formula A-W-DPhe-Arg-Z (II), wherein A is a radical corresponding to a monocarboxylic acid of general formula HOOC-R (III), wherein R is an linear or branched possibly substituted by a hydroxy group aliphatic C1-C24 radical which can comprise one or several unsaturations, preferably from 1 to 6 unsaturations, a lipoic acid or the reduced form thereof, a dihydrolipoic acid, N-lipoyl-lysine or a phenylbutyric acid, W is His, Ala-His, Ala-Ala-His, Nle-Ala-His, DTrp-Ala-His, Nle-Trp-His, Lys, Ala-Lys, Nle-Ala-Lys, Orn, Ala-Orn, Nle-Ala-Orn, Ala, Nle-Ala-Ala, Arg, Ala-Arg, Nle-Ala-Arg, Nle-Ala-DTrp or a bond in case of compounds of formula (II), Z is NH2, OH and OR, wherein R is a linear or branched aliphatic C1-C24 radical, TrpNH2, NapNH2, TpiNH2, TicNH2, AlaNH2i TrpOH, NapOH, TpiOH, TicOH, AlaOH, PheNH2, or PheOH, exempting a peptidic conjugate for which A is a radical corresponding to an acetic acid, W is Nle-Ala-His and Z is TrpNH2 in the form of enantiomers or diastereoisomer and the mixtures thereof including racemic mixtures. The use of the inventive compounds for cosmetically fighting against canities is also disclosed.