Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4605
Number of amino acids:339
Molecular Weight:36994.71 Da
Theoretical pI:5.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)298.55%
Cysteine CYS (C)20.59%
Glutamic Acid GLU (E)164.72%
Aspartic Acid ASP (D)175.01%
Glycine GLY (G)247.08%
Phynylalanine PHE (F)133.83%
Isoleucine ILE (I)216.19%
Histidine HIS (H)30.88%
Lysine LYS (K)113.24%
Methionine MET (M)51.47%
Leucine LEU (L)3410.03%
Asparagine ASN (N)339.73%
Glutamine GLN (Q)123.54%
Proline PRO (P)195.6%
Serine SER (S)267.67%
Arginine ARG (R)164.72%
Threonine THR (T)185.31%
Tryptophan TRP (W)20.59%
Valine VAL (V)257.37%
Tyrosine TYR (Y)133.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1642
HydrogenH2583
NitrogenN451
OxygenO508
SulphurS7

FormulaC1642H2583N451O508S7
Total Number of Atoms:5191


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30495
Absorption 0.1% (=1 g/l)    0.824,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30370
Absorption 0.1% (=1 g/l)    0.821,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.23

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.86, 30.09, 24.78]

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:93.2153
Grand average of hydropathicity (GRAVY):-0.17