Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4113
Number of amino acids:590
Molecular Weight:65848.45 Da
Theoretical pI:6.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)406.78%
Cysteine CYS (C)101.69%
Glutamic Acid GLU (E)294.92%
Aspartic Acid ASP (D)264.41%
Glycine GLY (G)427.12%
Phynylalanine PHE (F)305.08%
Isoleucine ILE (I)294.92%
Histidine HIS (H)254.24%
Lysine LYS (K)183.05%
Methionine MET (M)213.56%
Leucine LEU (L)437.29%
Asparagine ASN (N)355.93%
Glutamine GLN (Q)132.2%
Proline PRO (P)508.47%
Serine SER (S)223.73%
Arginine ARG (R)315.25%
Threonine THR (T)477.97%
Tryptophan TRP (W)81.36%
Valine VAL (V)528.81%
Tyrosine TYR (Y)193.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2962
HydrogenH4547
NitrogenN807
OxygenO837
SulphurS31

FormulaC2962H4547N807O837S31
Total Number of Atoms:9184


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):55
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72935
Absorption 0.1% (=1 g/l)    1.108,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72310
Absorption 0.1% (=1 g/l)    1.098,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.57

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.68, 25.25, 22.54]

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:79.9322
Grand average of hydropathicity (GRAVY):-0.16