Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4275
Number of amino acids:1207
Molecular Weight:131957.19 Da
Theoretical pI:6.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)645.3%
Cysteine CYS (C)221.82%
Glutamic Acid GLU (E)504.14%
Aspartic Acid ASP (D)604.97%
Glycine GLY (G)937.71%
Phynylalanine PHE (F)594.89%
Isoleucine ILE (I)655.39%
Histidine HIS (H)241.99%
Lysine LYS (K)725.97%
Methionine MET (M)252.07%
Leucine LEU (L)17914.83%
Asparagine ASN (N)907.46%
Glutamine GLN (Q)342.82%
Proline PRO (P)554.56%
Serine SER (S)13711.35%
Arginine ARG (R)322.65%
Threonine THR (T)483.98%
Tryptophan TRP (W)90.75%
Valine VAL (V)564.64%
Tyrosine TYR (Y)332.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC5906
HydrogenH9326
NitrogenN1556
OxygenO1770
SulphurS47

FormulaC5906H9326N1556O1770S47
Total Number of Atoms:18605


Total number of positively charged residues (ARG + LYS):104
Total number of negatively charged residues (ASP + GLU):110
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    100045
Absorption 0.1% (=1 g/l)    0.758,   assuming all pairs of CYS residues form cystines

Ext. coefficient    98670
Absorption 0.1% (=1 g/l)    0.748,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.22, 31.07, 26.35]

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:97.5975
Grand average of hydropathicity (GRAVY):-0.04