Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1065
Number of amino acids:255
Molecular Weight:26692.65 Da
Theoretical pI:4.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.67%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)155.88%
Glycine GLY (G)2610.2%
Phynylalanine PHE (F)166.27%
Isoleucine ILE (I)72.75%
Histidine HIS (H)10.39%
Lysine LYS (K)93.53%
Methionine MET (M)20.78%
Leucine LEU (L)176.67%
Asparagine ASN (N)114.31%
Glutamine GLN (Q)51.96%
Proline PRO (P)124.71%
Serine SER (S)3513.73%
Arginine ARG (R)41.57%
Threonine THR (T)2810.98%
Tryptophan TRP (W)31.18%
Valine VAL (V)155.88%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1163
HydrogenH1765
NitrogenN297
OxygenO388
SulphurS18

FormulaC1163H1765N297O388S18
Total Number of Atoms:3631


Total number of positively charged residues (ARG + LYS):13
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    30910
Absorption 0.1% (=1 g/l)    1.158,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.121,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.27, 32.94, 16.86]

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:60.4314
Grand average of hydropathicity (GRAVY):-0.01