Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1058
Number of amino acids:253
Molecular Weight:26364.79 Da
Theoretical pI:4.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)259.88%
Cysteine CYS (C)176.72%
Glutamic Acid GLU (E)103.95%
Aspartic Acid ASP (D)103.95%
Glycine GLY (G)2811.07%
Phynylalanine PHE (F)166.32%
Isoleucine ILE (I)145.53%
Histidine HIS (H)00%
Lysine LYS (K)62.37%
Methionine MET (M)31.19%
Leucine LEU (L)166.32%
Asparagine ASN (N)124.74%
Glutamine GLN (Q)51.98%
Proline PRO (P)155.93%
Serine SER (S)218.3%
Arginine ARG (R)41.58%
Threonine THR (T)2610.28%
Tryptophan TRP (W)31.19%
Valine VAL (V)135.14%
Tyrosine TYR (Y)93.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1165
HydrogenH1769
NitrogenN291
OxygenO367
SulphurS20

FormulaC1165H1769N291O367S20
Total Number of Atoms:3612


Total number of positively charged residues (ARG + LYS):10
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    30910
Absorption 0.1% (=1 g/l)    1.172,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.134,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.06, 30.04, 21.34]

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:71.0277
Grand average of hydropathicity (GRAVY):0.24