Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4015
Number of amino acids:437
Molecular Weight:48504.35 Da
Theoretical pI:5.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)358.01%
Cysteine CYS (C)81.83%
Glutamic Acid GLU (E)122.75%
Aspartic Acid ASP (D)388.7%
Glycine GLY (G)429.61%
Phynylalanine PHE (F)184.12%
Isoleucine ILE (I)214.81%
Histidine HIS (H)173.89%
Lysine LYS (K)204.58%
Methionine MET (M)92.06%
Leucine LEU (L)306.86%
Asparagine ASN (N)204.58%
Glutamine GLN (Q)153.43%
Proline PRO (P)204.58%
Serine SER (S)306.86%
Arginine ARG (R)184.12%
Threonine THR (T)225.03%
Tryptophan TRP (W)163.66%
Valine VAL (V)306.86%
Tyrosine TYR (Y)163.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2171
HydrogenH3254
NitrogenN596
OxygenO641
SulphurS17

FormulaC2171H3254N596O641S17
Total Number of Atoms:6679


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    112340
Absorption 0.1% (=1 g/l)    2.316,   assuming all pairs of CYS residues form cystines

Ext. coefficient    111840
Absorption 0.1% (=1 g/l)    2.306,   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 : 29.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.98, 25.63, 19.68]

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:73.4325
Grand average of hydropathicity (GRAVY):-0.34