Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4150
Number of amino acids:695
Molecular Weight:73543.07 Da
Theoretical pI:3.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)415.9%
Cysteine CYS (C)60.86%
Glutamic Acid GLU (E)446.33%
Aspartic Acid ASP (D)16623.88%
Glycine GLY (G)7510.79%
Phynylalanine PHE (F)71.01%
Isoleucine ILE (I)111.58%
Histidine HIS (H)202.88%
Lysine LYS (K)233.31%
Methionine MET (M)30.43%
Leucine LEU (L)456.47%
Asparagine ASN (N)446.33%
Glutamine GLN (Q)60.86%
Proline PRO (P)334.75%
Serine SER (S)395.61%
Arginine ARG (R)152.16%
Threonine THR (T)588.35%
Tryptophan TRP (W)30.43%
Valine VAL (V)446.33%
Tyrosine TYR (Y)121.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3018
HydrogenH4580
NitrogenN856
OxygenO1275
SulphurS9

FormulaC3018H4580N856O1275S9
Total Number of Atoms:9738


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):210
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34755
Absorption 0.1% (=1 g/l)    0.473,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34380
Absorption 0.1% (=1 g/l)    0.467,   assuming all CYS residues are reduced
Aromaticity:0.032

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.55, 27.48, 19.14]

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:55.6835
Grand average of hydropathicity (GRAVY):-1.13