Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4901
Number of amino acids:668
Molecular Weight:73848.77 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)466.89%
Cysteine CYS (C)202.99%
Glutamic Acid GLU (E)172.54%
Aspartic Acid ASP (D)375.54%
Glycine GLY (G)537.93%
Phynylalanine PHE (F)324.79%
Isoleucine ILE (I)395.84%
Histidine HIS (H)101.5%
Lysine LYS (K)517.63%
Methionine MET (M)152.25%
Leucine LEU (L)558.23%
Asparagine ASN (N)426.29%
Glutamine GLN (Q)263.89%
Proline PRO (P)477.04%
Serine SER (S)405.99%
Arginine ARG (R)243.59%
Threonine THR (T)517.63%
Tryptophan TRP (W)131.95%
Valine VAL (V)294.34%
Tyrosine TYR (Y)213.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3308
HydrogenH5148
NitrogenN892
OxygenO957
SulphurS35

FormulaC3308H5148N892O957S35
Total Number of Atoms:10340


Total number of positively charged residues (ARG + LYS):75
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    104040
Absorption 0.1% (=1 g/l)    1.409,   assuming all pairs of CYS residues form cystines

Ext. coefficient    102790
Absorption 0.1% (=1 g/l)    1.392,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.26

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.29, 27.25, 19.91]

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:74.3563
Grand average of hydropathicity (GRAVY):-0.32