Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5773
Number of amino acids:74
Molecular Weight:8254.54 Da
Theoretical pI:6.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)79.46%
Cysteine CYS (C)810.81%
Glutamic Acid GLU (E)45.41%
Aspartic Acid ASP (D)45.41%
Glycine GLY (G)22.7%
Phynylalanine PHE (F)45.41%
Isoleucine ILE (I)22.7%
Histidine HIS (H)45.41%
Lysine LYS (K)56.76%
Methionine MET (M)11.35%
Leucine LEU (L)912.16%
Asparagine ASN (N)45.41%
Glutamine GLN (Q)22.7%
Proline PRO (P)00%
Serine SER (S)45.41%
Arginine ARG (R)11.35%
Threonine THR (T)68.11%
Tryptophan TRP (W)11.35%
Valine VAL (V)56.76%
Tyrosine TYR (Y)11.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC359
HydrogenH563
NitrogenN97
OxygenO108
SulphurS9

FormulaC359H563N97O108S9
Total Number of Atoms:1136


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.907,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.847,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.73, 13.51, 28.38]

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:87.0272
Grand average of hydropathicity (GRAVY):0.18