Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4419
Number of amino acids:438
Molecular Weight:47796.07 Da
Theoretical pI:5.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4911.19%
Cysteine CYS (C)61.37%
Glutamic Acid GLU (E)132.97%
Aspartic Acid ASP (D)378.45%
Glycine GLY (G)4810.96%
Phynylalanine PHE (F)163.65%
Isoleucine ILE (I)235.25%
Histidine HIS (H)132.97%
Lysine LYS (K)235.25%
Methionine MET (M)132.97%
Leucine LEU (L)347.76%
Asparagine ASN (N)184.11%
Glutamine GLN (Q)122.74%
Proline PRO (P)173.88%
Serine SER (S)245.48%
Arginine ARG (R)153.42%
Threonine THR (T)173.88%
Tryptophan TRP (W)163.65%
Valine VAL (V)286.39%
Tyrosine TYR (Y)163.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2148
HydrogenH3250
NitrogenN578
OxygenO626
SulphurS19

FormulaC2148H3250N578O626S19
Total Number of Atoms:6621


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    112215
Absorption 0.1% (=1 g/l)    2.348,   assuming all pairs of CYS residues form cystines

Ext. coefficient    111840
Absorption 0.1% (=1 g/l)    2.340,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 21.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.37, 24.43, 24.89]

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:80.4794
Grand average of hydropathicity (GRAVY):-0.16