Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4912
Number of amino acids:259
Molecular Weight:29072.67 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.56%
Cysteine CYS (C)124.63%
Glutamic Acid GLU (E)103.86%
Aspartic Acid ASP (D)114.25%
Glycine GLY (G)145.41%
Phynylalanine PHE (F)93.47%
Isoleucine ILE (I)145.41%
Histidine HIS (H)31.16%
Lysine LYS (K)249.27%
Methionine MET (M)83.09%
Leucine LEU (L)259.65%
Asparagine ASN (N)135.02%
Glutamine GLN (Q)62.32%
Proline PRO (P)72.7%
Serine SER (S)3111.97%
Arginine ARG (R)103.86%
Threonine THR (T)103.86%
Tryptophan TRP (W)10.39%
Valine VAL (V)155.79%
Tyrosine TYR (Y)197.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1293
HydrogenH2041
NitrogenN339
OxygenO381
SulphurS20

FormulaC1293H2041N339O381S20
Total Number of Atoms:4074


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34560
Absorption 0.1% (=1 g/l)    1.189,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33810
Absorption 0.1% (=1 g/l)    1.163,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.01

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.05, 25.10, 23.17]

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:82.085
Grand average of hydropathicity (GRAVY):-0.16