Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4162
Number of amino acids:658
Molecular Weight:74978.23 Da
Theoretical pI:6.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)385.78%
Cysteine CYS (C)131.98%
Glutamic Acid GLU (E)497.45%
Aspartic Acid ASP (D)345.17%
Glycine GLY (G)406.08%
Phynylalanine PHE (F)335.02%
Isoleucine ILE (I)314.71%
Histidine HIS (H)142.13%
Lysine LYS (K)263.95%
Methionine MET (M)142.13%
Leucine LEU (L)6610.03%
Asparagine ASN (N)406.08%
Glutamine GLN (Q)172.58%
Proline PRO (P)294.41%
Serine SER (S)497.45%
Arginine ARG (R)517.75%
Threonine THR (T)314.71%
Tryptophan TRP (W)91.37%
Valine VAL (V)507.6%
Tyrosine TYR (Y)243.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3335
HydrogenH5199
NitrogenN931
OxygenO986
SulphurS27

FormulaC3335H5199N931O986S27
Total Number of Atoms:10478


Total number of positively charged residues (ARG + LYS):77
Total number of negatively charged residues (ASP + GLU):83
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    86010
Absorption 0.1% (=1 g/l)    1.147,   assuming all pairs of CYS residues form cystines

Ext. coefficient    85260
Absorption 0.1% (=1 g/l)    1.137,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.37, 24.01, 25.38]

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:85.304
Grand average of hydropathicity (GRAVY):-0.32