Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4560
Number of amino acids:269
Molecular Weight:29658.85 Da
Theoretical pI:6.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165.95%
Cysteine CYS (C)82.97%
Glutamic Acid GLU (E)72.6%
Aspartic Acid ASP (D)155.58%
Glycine GLY (G)3211.9%
Phynylalanine PHE (F)155.58%
Isoleucine ILE (I)134.83%
Histidine HIS (H)31.12%
Lysine LYS (K)155.58%
Methionine MET (M)124.46%
Leucine LEU (L)155.58%
Asparagine ASN (N)165.95%
Glutamine GLN (Q)124.46%
Proline PRO (P)134.83%
Serine SER (S)124.46%
Arginine ARG (R)62.23%
Threonine THR (T)207.43%
Tryptophan TRP (W)72.6%
Valine VAL (V)197.06%
Tyrosine TYR (Y)134.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1332
HydrogenH2007
NitrogenN343
OxygenO387
SulphurS20

FormulaC1332H2007N343O387S20
Total Number of Atoms:4089


Total number of positively charged residues (ARG + LYS):21
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    58370
Absorption 0.1% (=1 g/l)    1.968,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.951,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.48, 27.14, 18.59]

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:67.026
Grand average of hydropathicity (GRAVY):-0.15