Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5094
Number of amino acids:280
Molecular Weight:30473.35 Da
Theoretical pI:7.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.5%
Cysteine CYS (C)10.36%
Glutamic Acid GLU (E)82.86%
Aspartic Acid ASP (D)134.64%
Glycine GLY (G)165.71%
Phynylalanine PHE (F)176.07%
Isoleucine ILE (I)248.57%
Histidine HIS (H)72.5%
Lysine LYS (K)186.43%
Methionine MET (M)10.36%
Leucine LEU (L)196.79%
Asparagine ASN (N)227.86%
Glutamine GLN (Q)62.14%
Proline PRO (P)113.93%
Serine SER (S)3612.86%
Arginine ARG (R)41.43%
Threonine THR (T)238.21%
Tryptophan TRP (W)51.79%
Valine VAL (V)207.14%
Tyrosine TYR (Y)82.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1380
HydrogenH2129
NitrogenN357
OxygenO418
SulphurS2

FormulaC1380H2129N357O418S2
Total Number of Atoms:4286


Total number of positively charged residues (ARG + LYS):22
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    39420
Absorption 0.1% (=1 g/l)    1.294,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    1.294,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.21, 30.36, 17.50]

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:88.1071
Grand average of hydropathicity (GRAVY):-0.04