Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1141
Number of amino acids:255
Molecular Weight:26357.35 Da
Theoretical pI:4.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3011.76%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)83.14%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)2911.37%
Phynylalanine PHE (F)166.27%
Isoleucine ILE (I)62.35%
Histidine HIS (H)00%
Lysine LYS (K)93.53%
Methionine MET (M)31.18%
Leucine LEU (L)176.67%
Asparagine ASN (N)83.14%
Glutamine GLN (Q)41.57%
Proline PRO (P)135.1%
Serine SER (S)3011.76%
Arginine ARG (R)51.96%
Threonine THR (T)249.41%
Tryptophan TRP (W)31.18%
Valine VAL (V)93.53%
Tyrosine TYR (Y)114.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1153
HydrogenH1736
NitrogenN294
OxygenO377
SulphurS19

FormulaC1153H1736N294O377S19
Total Number of Atoms:3579


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33890
Absorption 0.1% (=1 g/l)    1.286,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.248,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.31, 31.37, 22.75]

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:57.1765
Grand average of hydropathicity (GRAVY):0.03