Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4639
Number of amino acids:339
Molecular Weight:36043.42 Da
Theoretical pI:6.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3911.5%
Cysteine CYS (C)82.36%
Glutamic Acid GLU (E)154.42%
Aspartic Acid ASP (D)92.65%
Glycine GLY (G)288.26%
Phynylalanine PHE (F)236.78%
Isoleucine ILE (I)288.26%
Histidine HIS (H)102.95%
Lysine LYS (K)185.31%
Methionine MET (M)113.24%
Leucine LEU (L)3811.21%
Asparagine ASN (N)72.06%
Glutamine GLN (Q)82.36%
Proline PRO (P)123.54%
Serine SER (S)298.55%
Arginine ARG (R)51.47%
Threonine THR (T)195.6%
Tryptophan TRP (W)20.59%
Valine VAL (V)257.37%
Tyrosine TYR (Y)51.47%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1647
HydrogenH2607
NitrogenN409
OxygenO456
SulphurS19

FormulaC1647H2607N409O456S19
Total Number of Atoms:5138


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18950
Absorption 0.1% (=1 g/l)    0.526,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.512,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.69, 22.42, 30.38]

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:108.82
Grand average of hydropathicity (GRAVY):0.63