Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5598
Number of amino acids:263
Molecular Weight:28457.24 Da
Theoretical pI:6.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)186.84%
Cysteine CYS (C)72.66%
Glutamic Acid GLU (E)186.84%
Aspartic Acid ASP (D)176.46%
Glycine GLY (G)3111.79%
Phynylalanine PHE (F)103.8%
Isoleucine ILE (I)114.18%
Histidine HIS (H)41.52%
Lysine LYS (K)2710.27%
Methionine MET (M)31.14%
Leucine LEU (L)145.32%
Asparagine ASN (N)72.66%
Glutamine GLN (Q)20.76%
Proline PRO (P)186.84%
Serine SER (S)166.08%
Arginine ARG (R)62.28%
Threonine THR (T)186.84%
Tryptophan TRP (W)62.28%
Valine VAL (V)207.6%
Tyrosine TYR (Y)103.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1276
HydrogenH1967
NitrogenN331
OxygenO387
SulphurS10

FormulaC1276H1967N331O387S10
Total Number of Atoms:3971


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):35
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48275
Absorption 0.1% (=1 g/l)    1.696,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47900
Absorption 0.1% (=1 g/l)    1.683,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.33

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.00, 27.38, 20.15]

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:65.9696
Grand average of hydropathicity (GRAVY):-0.43