Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1008
Number of amino acids:255
Molecular Weight:26574.96 Da
Theoretical pI:4.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)249.41%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)72.75%
Aspartic Acid ASP (D)135.1%
Glycine GLY (G)249.41%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)20.78%
Histidine HIS (H)10.39%
Lysine LYS (K)124.71%
Methionine MET (M)31.18%
Leucine LEU (L)228.63%
Asparagine ASN (N)83.14%
Glutamine GLN (Q)72.75%
Proline PRO (P)166.27%
Serine SER (S)2610.2%
Arginine ARG (R)20.78%
Threonine THR (T)3011.76%
Tryptophan TRP (W)31.18%
Valine VAL (V)166.27%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1169
HydrogenH1791
NitrogenN293
OxygenO376
SulphurS19

FormulaC1169H1791N293O376S19
Total Number of Atoms:3648


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):20
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)    1.163,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.125,   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 : 34.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.88, 29.02, 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):0.06