Physicochemical Properties of Peptide



PPepDB ID:PPepDB_910
Number of amino acids:255
Molecular Weight:25453.29 Da
Theoretical pI:4.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4316.86%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)3413.33%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)51.96%
Histidine HIS (H)20.78%
Lysine LYS (K)41.57%
Methionine MET (M)51.96%
Leucine LEU (L)135.1%
Asparagine ASN (N)72.75%
Glutamine GLN (Q)41.57%
Proline PRO (P)135.1%
Serine SER (S)2710.59%
Arginine ARG (R)83.14%
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
CarbonC1093
HydrogenH1663
NitrogenN301
OxygenO360
SulphurS21

FormulaC1093H1663N301O360S21
Total Number of Atoms:3438


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30910
Absorption 0.1% (=1 g/l)    1.214,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.175,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.65

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.78, 31.76, 25.49]

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:56.9019
Grand average of hydropathicity (GRAVY):0.13