Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1060
Number of amino acids:255
Molecular Weight:26654.61 Da
Theoretical pI:5.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)218.24%
Cysteine CYS (C)187.06%
Glutamic Acid GLU (E)103.92%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)3413.33%
Phynylalanine PHE (F)197.45%
Isoleucine ILE (I)41.57%
Histidine HIS (H)20.78%
Lysine LYS (K)103.92%
Methionine MET (M)20.78%
Leucine LEU (L)155.88%
Asparagine ASN (N)83.14%
Glutamine GLN (Q)20.78%
Proline PRO (P)124.71%
Serine SER (S)3112.16%
Arginine ARG (R)93.53%
Threonine THR (T)218.24%
Tryptophan TRP (W)31.18%
Valine VAL (V)114.31%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1160
HydrogenH1739
NitrogenN309
OxygenO375
SulphurS20

FormulaC1160H1739N309O375S20
Total Number of Atoms:3603


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31035
Absorption 0.1% (=1 g/l)    1.164,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.122,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.92, 33.33, 18.82]

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:49.8039
Grand average of hydropathicity (GRAVY):-0.12