Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5060
Number of amino acids:508
Molecular Weight:56364.51 Da
Theoretical pI:4.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)458.86%
Cysteine CYS (C)50.98%
Glutamic Acid GLU (E)499.65%
Aspartic Acid ASP (D)326.3%
Glycine GLY (G)254.92%
Phynylalanine PHE (F)387.48%
Isoleucine ILE (I)234.53%
Histidine HIS (H)91.77%
Lysine LYS (K)479.25%
Methionine MET (M)40.79%
Leucine LEU (L)367.09%
Asparagine ASN (N)224.33%
Glutamine GLN (Q)142.76%
Proline PRO (P)275.31%
Serine SER (S)438.46%
Arginine ARG (R)91.77%
Threonine THR (T)224.33%
Tryptophan TRP (W)30.59%
Valine VAL (V)428.27%
Tyrosine TYR (Y)132.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2549
HydrogenH3919
NitrogenN639
OxygenO785
SulphurS9

FormulaC2549H3919N639O785S9
Total Number of Atoms:7901


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):81
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36120
Absorption 0.1% (=1 g/l)    0.641,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    0.636,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.08

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.51, 23.03, 26.38]

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:78.1299
Grand average of hydropathicity (GRAVY):-0.32