Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5615
Number of amino acids:312
Molecular Weight:32381.58 Da
Theoretical pI:8.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3912.5%
Cysteine CYS (C)92.88%
Glutamic Acid GLU (E)41.28%
Aspartic Acid ASP (D)154.81%
Glycine GLY (G)247.69%
Phynylalanine PHE (F)123.85%
Isoleucine ILE (I)113.53%
Histidine HIS (H)41.28%
Lysine LYS (K)103.21%
Methionine MET (M)82.56%
Leucine LEU (L)319.94%
Asparagine ASN (N)237.37%
Glutamine GLN (Q)113.53%
Proline PRO (P)103.21%
Serine SER (S)3711.86%
Arginine ARG (R)123.85%
Threonine THR (T)278.65%
Tryptophan TRP (W)10.32%
Valine VAL (V)206.41%
Tyrosine TYR (Y)41.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1391
HydrogenH2247
NitrogenN401
OxygenO453
SulphurS17

FormulaC1391H2247N401O453S17
Total Number of Atoms:4509


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11960
Absorption 0.1% (=1 g/l)    0.369,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.354,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.32, 30.13, 26.28]

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:83.5898
Grand average of hydropathicity (GRAVY):0.07