Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4439
Number of amino acids:495
Molecular Weight:55706.34 Da
Theoretical pI:5.9


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)295.86%
Cysteine CYS (C)112.22%
Glutamic Acid GLU (E)418.28%
Aspartic Acid ASP (D)173.43%
Glycine GLY (G)367.27%
Phynylalanine PHE (F)244.85%
Isoleucine ILE (I)265.25%
Histidine HIS (H)81.62%
Lysine LYS (K)255.05%
Methionine MET (M)71.41%
Leucine LEU (L)377.47%
Asparagine ASN (N)377.47%
Glutamine GLN (Q)489.7%
Proline PRO (P)295.86%
Serine SER (S)346.87%
Arginine ARG (R)275.45%
Threonine THR (T)204.04%
Tryptophan TRP (W)40.81%
Valine VAL (V)244.85%
Tyrosine TYR (Y)112.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2432
HydrogenH3808
NitrogenN706
OxygenO762
SulphurS18

FormulaC2432H3808N706O762S18
Total Number of Atoms:7726


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39015
Absorption 0.1% (=1 g/l)    0.700,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38390
Absorption 0.1% (=1 g/l)    0.689,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.46

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.45, 27.47, 23.03]

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:69.5556
Grand average of hydropathicity (GRAVY):-0.70