Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4902
Number of amino acids:424
Molecular Weight:47088.36 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)122.83%
Cysteine CYS (C)102.36%
Glutamic Acid GLU (E)307.08%
Aspartic Acid ASP (D)143.3%
Glycine GLY (G)348.02%
Phynylalanine PHE (F)235.42%
Isoleucine ILE (I)163.77%
Histidine HIS (H)30.71%
Lysine LYS (K)235.42%
Methionine MET (M)112.59%
Leucine LEU (L)7718.16%
Asparagine ASN (N)368.49%
Glutamine GLN (Q)71.65%
Proline PRO (P)225.19%
Serine SER (S)4310.14%
Arginine ARG (R)163.77%
Threonine THR (T)184.25%
Tryptophan TRP (W)61.42%
Valine VAL (V)163.77%
Tyrosine TYR (Y)71.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2111
HydrogenH3346
NitrogenN550
OxygenO624
SulphurS21

FormulaC2111H3346N550O624S21
Total Number of Atoms:6652


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    44055
Absorption 0.1% (=1 g/l)    0.936,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43430
Absorption 0.1% (=1 g/l)    0.922,   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 : 40.93

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.20, 31.84, 30.66]

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:99.3161
Grand average of hydropathicity (GRAVY):-0.05