Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5315
Number of amino acids:266
Molecular Weight:30278.16 Da
Theoretical pI:9.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.89%
Cysteine CYS (C)134.89%
Glutamic Acid GLU (E)114.14%
Aspartic Acid ASP (D)114.14%
Glycine GLY (G)176.39%
Phynylalanine PHE (F)103.76%
Isoleucine ILE (I)145.26%
Histidine HIS (H)20.75%
Lysine LYS (K)217.89%
Methionine MET (M)103.76%
Leucine LEU (L)269.77%
Asparagine ASN (N)166.02%
Glutamine GLN (Q)72.63%
Proline PRO (P)72.63%
Serine SER (S)269.77%
Arginine ARG (R)155.64%
Threonine THR (T)114.14%
Tryptophan TRP (W)41.5%
Valine VAL (V)166.02%
Tyrosine TYR (Y)166.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1343
HydrogenH2117
NitrogenN363
OxygenO387
SulphurS23

FormulaC1343H2117N363O387S23
Total Number of Atoms:4233


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    46590
Absorption 0.1% (=1 g/l)    1.539,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45840
Absorption 0.1% (=1 g/l)    1.514,   assuming all CYS residues are reduced
Aromaticity:0.113

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.99

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.33, 24.81, 22.56]

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:80.9775
Grand average of hydropathicity (GRAVY):-0.20