Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5818
Number of amino acids:99
Molecular Weight:10981.85 Da
Theoretical pI:7.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)55.05%
Cysteine CYS (C)88.08%
Glutamic Acid GLU (E)66.06%
Aspartic Acid ASP (D)55.05%
Glycine GLY (G)1010.1%
Phynylalanine PHE (F)77.07%
Isoleucine ILE (I)99.09%
Histidine HIS (H)00%
Lysine LYS (K)77.07%
Methionine MET (M)22.02%
Leucine LEU (L)66.06%
Asparagine ASN (N)33.03%
Glutamine GLN (Q)22.02%
Proline PRO (P)55.05%
Serine SER (S)55.05%
Arginine ARG (R)55.05%
Threonine THR (T)44.04%
Tryptophan TRP (W)11.01%
Valine VAL (V)66.06%
Tyrosine TYR (Y)33.03%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC490
HydrogenH767
NitrogenN127
OxygenO139
SulphurS10

FormulaC490H767N127O139S10
Total Number of Atoms:1533


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10470
Absorption 0.1% (=1 g/l)    0.953,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.908,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.61

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.32, 23.23, 19.19]

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:81.7172
Grand average of hydropathicity (GRAVY):0.12