Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4394
Number of amino acids:668
Molecular Weight:73561.26 Da
Theoretical pI:5.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)527.78%
Cysteine CYS (C)50.75%
Glutamic Acid GLU (E)6710.03%
Aspartic Acid ASP (D)477.04%
Glycine GLY (G)568.38%
Phynylalanine PHE (F)253.74%
Isoleucine ILE (I)446.59%
Histidine HIS (H)60.9%
Lysine LYS (K)669.88%
Methionine MET (M)91.35%
Leucine LEU (L)497.34%
Asparagine ASN (N)284.19%
Glutamine GLN (Q)253.74%
Proline PRO (P)213.14%
Serine SER (S)314.64%
Arginine ARG (R)274.04%
Threonine THR (T)416.14%
Tryptophan TRP (W)20.3%
Valine VAL (V)537.93%
Tyrosine TYR (Y)142.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3240
HydrogenH5226
NitrogenN882
OxygenO1036
SulphurS14

FormulaC3240H5226N882O1036S14
Total Number of Atoms:10398


Total number of positively charged residues (ARG + LYS):93
Total number of negatively charged residues (ASP + GLU):114
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32110
Absorption 0.1% (=1 g/l)    0.437,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31860
Absorption 0.1% (=1 g/l)    0.433,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.99, 20.36, 26.50]

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:85.0898
Grand average of hydropathicity (GRAVY):-0.47