Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4793
Number of amino acids:313
Molecular Weight:34120.44 Da
Theoretical pI:6.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3912.46%
Cysteine CYS (C)113.51%
Glutamic Acid GLU (E)196.07%
Aspartic Acid ASP (D)206.39%
Glycine GLY (G)257.99%
Phynylalanine PHE (F)72.24%
Isoleucine ILE (I)72.24%
Histidine HIS (H)113.51%
Lysine LYS (K)41.28%
Methionine MET (M)72.24%
Leucine LEU (L)247.67%
Asparagine ASN (N)61.92%
Glutamine GLN (Q)103.19%
Proline PRO (P)144.47%
Serine SER (S)196.07%
Arginine ARG (R)309.58%
Threonine THR (T)206.39%
Tryptophan TRP (W)51.6%
Valine VAL (V)288.95%
Tyrosine TYR (Y)72.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1468
HydrogenH2326
NitrogenN450
OxygenO454
SulphurS18

FormulaC1468H2326N450O454S18
Total Number of Atoms:4716


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38555
Absorption 0.1% (=1 g/l)    1.130,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37930
Absorption 0.1% (=1 g/l)    1.112,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.76

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.92, 20.45, 28.43]

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:77.0288
Grand average of hydropathicity (GRAVY):-0.26