Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5176
Number of amino acids:260
Molecular Weight:27797.56 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)238.85%
Cysteine CYS (C)83.08%
Glutamic Acid GLU (E)31.15%
Aspartic Acid ASP (D)62.31%
Glycine GLY (G)3312.69%
Phynylalanine PHE (F)114.23%
Isoleucine ILE (I)114.23%
Histidine HIS (H)31.15%
Lysine LYS (K)83.08%
Methionine MET (M)62.31%
Leucine LEU (L)186.92%
Asparagine ASN (N)145.38%
Glutamine GLN (Q)145.38%
Proline PRO (P)145.38%
Serine SER (S)238.85%
Arginine ARG (R)72.69%
Threonine THR (T)207.69%
Tryptophan TRP (W)114.23%
Valine VAL (V)176.54%
Tyrosine TYR (Y)103.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1250
HydrogenH1882
NitrogenN334
OxygenO360
SulphurS14

FormulaC1250H1882N334O360S14
Total Number of Atoms:3840


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75900
Absorption 0.1% (=1 g/l)    2.730,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75400
Absorption 0.1% (=1 g/l)    2.712,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.00, 32.31, 19.23]

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:71.3077
Grand average of hydropathicity (GRAVY):0.00