Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5055
Number of amino acids:497
Molecular Weight:55832.56 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)265.23%
Cysteine CYS (C)71.41%
Glutamic Acid GLU (E)306.04%
Aspartic Acid ASP (D)244.83%
Glycine GLY (G)408.05%
Phynylalanine PHE (F)306.04%
Isoleucine ILE (I)295.84%
Histidine HIS (H)132.62%
Lysine LYS (K)316.24%
Methionine MET (M)91.81%
Leucine LEU (L)448.85%
Asparagine ASN (N)275.43%
Glutamine GLN (Q)81.61%
Proline PRO (P)295.84%
Serine SER (S)428.45%
Arginine ARG (R)142.82%
Threonine THR (T)244.83%
Tryptophan TRP (W)122.41%
Valine VAL (V)346.84%
Tyrosine TYR (Y)244.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2559
HydrogenH3851
NitrogenN643
OxygenO731
SulphurS16

FormulaC2559H3851N643O731S16
Total Number of Atoms:7800


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    102135
Absorption 0.1% (=1 g/l)    1.829,   assuming all pairs of CYS residues form cystines

Ext. coefficient    101760
Absorption 0.1% (=1 g/l)    1.823,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.81, 27.77, 21.93]

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:82.3541
Grand average of hydropathicity (GRAVY):-0.17