Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3816
Number of amino acids:46
Molecular Weight:4875.62 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.52%
Cysteine CYS (C)613.04%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)24.35%
Glycine GLY (G)510.87%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)48.7%
Histidine HIS (H)12.17%
Lysine LYS (K)48.7%
Methionine MET (M)00%
Leucine LEU (L)24.35%
Asparagine ASN (N)24.35%
Glutamine GLN (Q)00%
Proline PRO (P)24.35%
Serine SER (S)510.87%
Arginine ARG (R)36.52%
Threonine THR (T)510.87%
Tryptophan TRP (W)12.17%
Valine VAL (V)00%
Tyrosine TYR (Y)12.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC202
HydrogenH334
NitrogenN64
OxygenO64
SulphurS6

FormulaC202H334N64O64S6
Total Number of Atoms:670


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    1.511,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.434,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.39, 30.43, 10.87]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:57.3913
Grand average of hydropathicity (GRAVY):-0.33