Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4697
Number of amino acids:921
Molecular Weight:102612.97 Da
Theoretical pI:7.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)586.3%
Cysteine CYS (C)70.76%
Glutamic Acid GLU (E)444.78%
Aspartic Acid ASP (D)464.99%
Glycine GLY (G)606.51%
Phynylalanine PHE (F)525.65%
Isoleucine ILE (I)657.06%
Histidine HIS (H)151.63%
Lysine LYS (K)384.13%
Methionine MET (M)222.39%
Leucine LEU (L)9310.1%
Asparagine ASN (N)475.1%
Glutamine GLN (Q)222.39%
Proline PRO (P)454.89%
Serine SER (S)849.12%
Arginine ARG (R)525.65%
Threonine THR (T)576.19%
Tryptophan TRP (W)171.85%
Valine VAL (V)748.03%
Tyrosine TYR (Y)232.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4642
HydrogenH7269
NitrogenN1231
OxygenO1335
SulphurS29

FormulaC4642H7269N1231O1335S29
Total Number of Atoms:14506


Total number of positively charged residues (ARG + LYS):90
Total number of negatively charged residues (ASP + GLU):90
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    128145
Absorption 0.1% (=1 g/l)    1.249,   assuming all pairs of CYS residues form cystines

Ext. coefficient    127770
Absorption 0.1% (=1 g/l)    1.245,   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 : 40.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.18, 25.62, 23.56]

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:96.5037
Grand average of hydropathicity (GRAVY):0.03