Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4899
Number of amino acids:330
Molecular Weight:35556.42 Da
Theoretical pI:8.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.18%
Cysteine CYS (C)92.73%
Glutamic Acid GLU (E)82.42%
Aspartic Acid ASP (D)195.76%
Glycine GLY (G)319.39%
Phynylalanine PHE (F)226.67%
Isoleucine ILE (I)154.55%
Histidine HIS (H)51.52%
Lysine LYS (K)144.24%
Methionine MET (M)51.52%
Leucine LEU (L)288.48%
Asparagine ASN (N)185.45%
Glutamine GLN (Q)154.55%
Proline PRO (P)113.33%
Serine SER (S)298.79%
Arginine ARG (R)195.76%
Threonine THR (T)226.67%
Tryptophan TRP (W)20.61%
Valine VAL (V)278.18%
Tyrosine TYR (Y)41.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1565
HydrogenH2476
NitrogenN446
OxygenO473
SulphurS14

FormulaC1565H2476N446O473S14
Total Number of Atoms:4974


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

Ext. coefficient    17460
Absorption 0.1% (=1 g/l)    0.491,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    0.477,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.37

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.70, 26.97, 20.61]

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:82.7273
Grand average of hydropathicity (GRAVY):-0.04