Physicochemical Properties of Peptide



PPepDB ID:PPepDB_684
Number of amino acids:255
Molecular Weight:25938.99 Da
Theoretical pI:6.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3312.94%
Cysteine CYS (C)176.67%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)114.31%
Glycine GLY (G)3212.55%
Phynylalanine PHE (F)93.53%
Isoleucine ILE (I)51.96%
Histidine HIS (H)10.39%
Lysine LYS (K)114.31%
Methionine MET (M)10.39%
Leucine LEU (L)135.1%
Asparagine ASN (N)72.75%
Glutamine GLN (Q)41.57%
Proline PRO (P)145.49%
Serine SER (S)3011.76%
Arginine ARG (R)72.75%
Threonine THR (T)207.84%
Tryptophan TRP (W)41.57%
Valine VAL (V)176.67%
Tyrosine TYR (Y)124.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1126
HydrogenH1726
NitrogenN304
OxygenO365
SulphurS18

FormulaC1126H1726N304O365S18
Total Number of Atoms:3539


Total number of positively charged residues (ARG + LYS):18
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    40880
Absorption 0.1% (=1 g/l)    1.576,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.537,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.53, 32.55, 21.18]

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:59.8039
Grand average of hydropathicity (GRAVY):0.00