Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5788
Number of amino acids:332
Molecular Weight:38390.48 Da
Theoretical pI:5.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)30.9%
Cysteine CYS (C)103.01%
Glutamic Acid GLU (E)339.94%
Aspartic Acid ASP (D)195.72%
Glycine GLY (G)123.61%
Phynylalanine PHE (F)185.42%
Isoleucine ILE (I)288.43%
Histidine HIS (H)154.52%
Lysine LYS (K)144.22%
Methionine MET (M)61.81%
Leucine LEU (L)309.04%
Asparagine ASN (N)144.22%
Glutamine GLN (Q)72.11%
Proline PRO (P)216.33%
Serine SER (S)298.73%
Arginine ARG (R)195.72%
Threonine THR (T)288.43%
Tryptophan TRP (W)30.9%
Valine VAL (V)164.82%
Tyrosine TYR (Y)72.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1703
HydrogenH2649
NitrogenN457
OxygenO522
SulphurS16

FormulaC1703H2649N457O522S16
Total Number of Atoms:5347


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27555
Absorption 0.1% (=1 g/l)    0.718,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    0.701,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.73

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.72, 22.89, 21.69]

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:83.012
Grand average of hydropathicity (GRAVY):-0.41