Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4467
Number of amino acids:517
Molecular Weight:56792.3 Da
Theoretical pI:4.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)468.9%
Cysteine CYS (C)50.97%
Glutamic Acid GLU (E)295.61%
Aspartic Acid ASP (D)265.03%
Glycine GLY (G)468.9%
Phynylalanine PHE (F)275.22%
Isoleucine ILE (I)244.64%
Histidine HIS (H)112.13%
Lysine LYS (K)132.51%
Methionine MET (M)101.93%
Leucine LEU (L)509.67%
Asparagine ASN (N)163.09%
Glutamine GLN (Q)254.84%
Proline PRO (P)305.8%
Serine SER (S)397.54%
Arginine ARG (R)193.68%
Threonine THR (T)295.61%
Tryptophan TRP (W)163.09%
Valine VAL (V)407.74%
Tyrosine TYR (Y)163.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2581
HydrogenH3904
NitrogenN666
OxygenO753
SulphurS15

FormulaC2581H3904N666O753S15
Total Number of Atoms:7919


Total number of positively charged residues (ARG + LYS):32
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    112090
Absorption 0.1% (=1 g/l)    1.974,   assuming all pairs of CYS residues form cystines

Ext. coefficient    111840
Absorption 0.1% (=1 g/l)    1.969,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.46, 25.34, 26.11]

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:87.1567
Grand average of hydropathicity (GRAVY):-0.01