Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1182
Number of amino acids:255
Molecular Weight:26823.53 Da
Theoretical pI:8.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.02%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)135.1%
Glycine GLY (G)2610.2%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)93.53%
Histidine HIS (H)10.39%
Lysine LYS (K)114.31%
Methionine MET (M)31.18%
Leucine LEU (L)218.24%
Asparagine ASN (N)51.96%
Glutamine GLN (Q)41.57%
Proline PRO (P)155.88%
Serine SER (S)3413.33%
Arginine ARG (R)135.1%
Threonine THR (T)176.67%
Tryptophan TRP (W)31.18%
Valine VAL (V)145.49%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1173
HydrogenH1835
NitrogenN319
OxygenO363
SulphurS19

FormulaC1173H1835N319O363S19
Total Number of Atoms:3709


Total number of positively charged residues (ARG + LYS):24
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    30910
Absorption 0.1% (=1 g/l)    1.152,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.115,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.48

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 31.37, 20.78]

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:70.8235
Grand average of hydropathicity (GRAVY):0.04