Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5617
Number of amino acids:291
Molecular Weight:31283.23 Da
Theoretical pI:4.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)299.97%
Cysteine CYS (C)62.06%
Glutamic Acid GLU (E)41.37%
Aspartic Acid ASP (D)165.5%
Glycine GLY (G)3311.34%
Phynylalanine PHE (F)134.47%
Isoleucine ILE (I)144.81%
Histidine HIS (H)20.69%
Lysine LYS (K)103.44%
Methionine MET (M)31.03%
Leucine LEU (L)3211%
Asparagine ASN (N)268.93%
Glutamine GLN (Q)165.5%
Proline PRO (P)124.12%
Serine SER (S)206.87%
Arginine ARG (R)51.72%
Threonine THR (T)113.78%
Tryptophan TRP (W)82.75%
Valine VAL (V)175.84%
Tyrosine TYR (Y)144.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1412
HydrogenH2132
NitrogenN370
OxygenO419
SulphurS9

FormulaC1412H2132N370O419S9
Total Number of Atoms:4342


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    65235
Absorption 0.1% (=1 g/l)    2.085,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64860
Absorption 0.1% (=1 g/l)    2.073,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.68, 31.27, 23.37]

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:88.5568
Grand average of hydropathicity (GRAVY):-0.00