Physicochemical Properties of Peptide



PPepDB ID:PPepDB_907
Number of amino acids:255
Molecular Weight:26808.37 Da
Theoretical pI:5.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.02%
Cysteine CYS (C)176.67%
Glutamic Acid GLU (E)93.53%
Aspartic Acid ASP (D)103.92%
Glycine GLY (G)259.8%
Phynylalanine PHE (F)155.88%
Isoleucine ILE (I)62.35%
Histidine HIS (H)10.39%
Lysine LYS (K)135.1%
Methionine MET (M)51.96%
Leucine LEU (L)197.45%
Asparagine ASN (N)155.88%
Glutamine GLN (Q)51.96%
Proline PRO (P)135.1%
Serine SER (S)239.02%
Arginine ARG (R)31.18%
Threonine THR (T)2710.59%
Tryptophan TRP (W)31.18%
Valine VAL (V)155.88%
Tyrosine TYR (Y)83.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1174
HydrogenH1806
NitrogenN302
OxygenO372
SulphurS22

FormulaC1174H1806N302O372S22
Total Number of Atoms:3676


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.097,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.060,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.88, 29.80, 21.96]

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:64.3137
Grand average of hydropathicity (GRAVY):0.05