Physicochemical Properties of Peptide



PPepDB ID:PPepDB_707
Number of amino acids:255
Molecular Weight:26797.5 Da
Theoretical pI:7.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)207.84%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)135.1%
Glycine GLY (G)3413.33%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)93.53%
Histidine HIS (H)20.78%
Lysine LYS (K)114.31%
Methionine MET (M)31.18%
Leucine LEU (L)228.63%
Asparagine ASN (N)93.53%
Glutamine GLN (Q)51.96%
Proline PRO (P)166.27%
Serine SER (S)239.02%
Arginine ARG (R)103.92%
Threonine THR (T)166.27%
Tryptophan TRP (W)31.18%
Valine VAL (V)145.49%
Tyrosine TYR (Y)114.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1181
HydrogenH1821
NitrogenN317
OxygenO358
SulphurS19

FormulaC1181H1821N317O358S19
Total Number of Atoms:3696


Total number of positively charged residues (ARG + LYS):21
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    33890
Absorption 0.1% (=1 g/l)    1.265,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.227,   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 : 39.61

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.84, 32.16, 20.00]

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:71.1765
Grand average of hydropathicity (GRAVY):0.01