Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4393
Number of amino acids:669
Molecular Weight:73629.3 Da
Theoretical pI:5.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)527.77%
Cysteine CYS (C)50.75%
Glutamic Acid GLU (E)6710.01%
Aspartic Acid ASP (D)477.03%
Glycine GLY (G)578.52%
Phynylalanine PHE (F)253.74%
Isoleucine ILE (I)456.73%
Histidine HIS (H)60.9%
Lysine LYS (K)659.72%
Methionine MET (M)91.35%
Leucine LEU (L)497.32%
Asparagine ASN (N)304.48%
Glutamine GLN (Q)253.74%
Proline PRO (P)213.14%
Serine SER (S)314.63%
Arginine ARG (R)274.04%
Threonine THR (T)395.83%
Tryptophan TRP (W)20.3%
Valine VAL (V)537.92%
Tyrosine TYR (Y)142.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3242
HydrogenH5226
NitrogenN884
OxygenO1037
SulphurS14

FormulaC3242H5226N884O1037S14
Total Number of Atoms:10403


Total number of positively charged residues (ARG + LYS):92
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)    0.436,   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 : 31.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.10, 20.78, 26.46]

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:85.5456
Grand average of hydropathicity (GRAVY):-0.46