Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5278
Number of amino acids:254
Molecular Weight:29280.41 Da
Theoretical pI:6.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.69%
Cysteine CYS (C)31.18%
Glutamic Acid GLU (E)207.87%
Aspartic Acid ASP (D)114.33%
Glycine GLY (G)176.69%
Phynylalanine PHE (F)166.3%
Isoleucine ILE (I)145.51%
Histidine HIS (H)83.15%
Lysine LYS (K)176.69%
Methionine MET (M)51.97%
Leucine LEU (L)239.06%
Asparagine ASN (N)145.51%
Glutamine GLN (Q)72.76%
Proline PRO (P)114.33%
Serine SER (S)135.12%
Arginine ARG (R)135.12%
Threonine THR (T)114.33%
Tryptophan TRP (W)41.57%
Valine VAL (V)166.3%
Tyrosine TYR (Y)145.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1336
HydrogenH2029
NitrogenN351
OxygenO376
SulphurS8

FormulaC1336H2029N351O376S8
Total Number of Atoms:4100


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42985
Absorption 0.1% (=1 g/l)    1.468,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42860
Absorption 0.1% (=1 g/l)    1.464,   assuming all CYS residues are reduced
Aromaticity:0.134

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.25, 21.65, 25.59]

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:81.7716
Grand average of hydropathicity (GRAVY):-0.34