Peptidic compound that can be used in cosmetics and dermatology domains, comprising at least one amino acid selected from a lysine, an ornithine, a diaminopropionic acid, a diaminobutyric acid and a hydroxylated derivative of these amino acids, Wherein said peptidic compound has the following general formula I: X- n - *- m -Z Wherein: • * is lysine (K*), omithine (Om*), diaminopropionic acid (Dap*) or diaminobutyric acid (Dab*) or a hydroxylated derivative of these aminoacids, on which a carboxylic acid is grafted by peptidic bound on the nitrogen of the lateral chain, said carboxylic acid comprising one cycle or heterocyle selected from proline (P, Pro), hydroxyproline (Hyp), pyroglutamic acid (Pyr), histidine (H, His), phenylalanine (F, Phe), tyrosine (Y, Tyr), tryptophane (W, Trp), tetrahydroisoquinoline-3 carboxylic acid (Tic), tetrahydronorharman-3 carboxylic acid (Tpi), pipecolic acid (Hpr), nipecotic acid (Nip), picolinic acid (Pic), 4-imidazole carboxylic acid (Im4COOH), stachydrine (Sta), betonicine (Btn) and homarine (Hom); • n = 0, 1, 2, 3 or 4; • m = 0, 1, 2, 3 or 4; • n+m being comprised between 1 and 5; • AA = * or an aminoacid selected from alanine (A, Ala), cystein (C, Cys), aspartic acid (D, Asp), glutamic acid (E, Glu), phenylalanine (F, Phe), glycine (G, Gly), histidine (H, His), isoleucine (I, Ile), lysine (K, Lys), leucine (L, Leu), methionine (M, Met), asparagine (N, Asn), proline (P, Pro), glutamine (Q, Gln), arginine (R, Arg), serine (S, Ser), threonine (T, Thr), valine (V, Val), tryptophane (W, Trp) and tyrosine (Y, Tyr); the AA being selected independently from each other when n+m >1; • At the N terminal end, X is selected from H, -CO-R 1 and -SO 2 -R 1; • At the C terminal end, Z is selected from OH, OR 1, NH 2, NHR 1 ou NR 1 R 2; and • R 1 and R 2 being, independently from each other, selected from an alkyle, aryle, aralkyle, alkylaryl, alkoxy and aryloxy radical, that can be linear, branched, cyclic, polycyclic, unsaturated, hydroxylated, carbonylated, phosphorylated and/or sulphated, which said radical can comprise in its skeleton a heteroatom, in particular O, S and/or N; with the exception of the peptidic compound H-FK -OH corresponding in formula to X=H, n=1, m=0, AA=F, AA*=K, i.e. a lysine grafted with a phenylalanine, and Z=OH. • * is lysine (K*), omithine (Om*), diaminopropionic acid (Dap*) or diaminobutyric acid (Dab*) or a hydroxylated derivative of these aminoacids, on which a carboxylic acid is grafted by peptidic bound on the nitrogen of the lateral chain, said carboxylic acid comprising one cycle or heterocyle selected from proline (P, Pro), hydroxyproline (Hyp), pyroglutamic acid (Pyr), histidine (H, His), phenylalanine (F, Phe), tyrosine (Y, Tyr), tryptophane (W, Trp), tetrahydroisoquinoline-3 carboxylic acid (Tic), tetrahydronorharman-3 carboxylic acid (Tpi), pipecolic acid (Hpr), nipecotic acid (Nip), picolinic acid (Pic), 4-imidazole carboxylic acid (Im4COOH), stachydrine (Sta), betonicine (Btn) and homarine (Hom); • n = 0, 1, 2, 3 or 4; • m = 0, 1, 2, 3 or 4; • n+m being comprised between 1 and 5; • AA = * or an aminoacid selected from alanine (A, Ala), cystein (C, Cys), aspartic acid (D, Asp), glutamic acid (E, Glu), phenylalanine (F, Phe), glycine (G, Gly), histidine (H, His), isoleucine (I, Ile), lysine (K, Lys), leucine (L, Leu), methionine (M, Met), asparagine (N, Asn), proline (P, Pro), glutamine (Q, Gln), arginine (R, Arg), serine (S, Ser), threonine (T, Thr), valine (V, Val), tryptophane (W, Trp) and tyrosine (Y, Tyr); the AA being selected independently from each other when n+m >1; • At the N terminal end, X is selected from H, -CO-R 1 and -SO 2 -R 1; • At the C terminal end, Z is selected from OH, OR 1, NH 2, NHR 1 ou NR 1 R 2; and • R 1 and R 2 being, independently from each other, selected from an alkyle, aryle, aralkyle, alkylaryl, alkoxy and aryloxy radical, that can be linear, branched, cyclic, polycyclic, unsaturated, hydroxylated, carbonylated, phosphorylated and/or sulphated, which said radical can comprise in its skeleton a heteroatom, in particular O, S and/or N;