Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4098
Number of amino acids:444
Molecular Weight:49222.21 Da
Theoretical pI:5.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)347.66%
Cysteine CYS (C)30.68%
Glutamic Acid GLU (E)306.76%
Aspartic Acid ASP (D)194.28%
Glycine GLY (G)357.88%
Phynylalanine PHE (F)163.6%
Isoleucine ILE (I)122.7%
Histidine HIS (H)51.13%
Lysine LYS (K)204.5%
Methionine MET (M)112.48%
Leucine LEU (L)4911.04%
Asparagine ASN (N)184.05%
Glutamine GLN (Q)204.5%
Proline PRO (P)245.41%
Serine SER (S)286.31%
Arginine ARG (R)214.73%
Threonine THR (T)286.31%
Tryptophan TRP (W)92.03%
Valine VAL (V)449.91%
Tyrosine TYR (Y)184.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2217
HydrogenH3458
NitrogenN584
OxygenO655
SulphurS14

FormulaC2217H3458N584O655S14
Total Number of Atoms:6928


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    76445
Absorption 0.1% (=1 g/l)    1.553,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76320
Absorption 0.1% (=1 g/l)    1.551,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 23.65, 27.93]

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:89.9773
Grand average of hydropathicity (GRAVY):-0.13