Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4225
Number of amino acids:763
Molecular Weight:83787.84 Da
Theoretical pI:5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)496.42%
Cysteine CYS (C)81.05%
Glutamic Acid GLU (E)303.93%
Aspartic Acid ASP (D)476.16%
Glycine GLY (G)455.9%
Phynylalanine PHE (F)476.16%
Isoleucine ILE (I)466.03%
Histidine HIS (H)50.66%
Lysine LYS (K)303.93%
Methionine MET (M)60.79%
Leucine LEU (L)7710.09%
Asparagine ASN (N)425.5%
Glutamine GLN (Q)303.93%
Proline PRO (P)415.37%
Serine SER (S)8110.62%
Arginine ARG (R)314.06%
Threonine THR (T)557.21%
Tryptophan TRP (W)50.66%
Valine VAL (V)617.99%
Tyrosine TYR (Y)273.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3775
HydrogenH5875
NitrogenN973
OxygenO1153
SulphurS14

FormulaC3775H5875N973O1153S14
Total Number of Atoms:11790


Total number of positively charged residues (ARG + LYS):61
Total number of negatively charged residues (ASP + GLU):77
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68230
Absorption 0.1% (=1 g/l)    0.814,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67730
Absorption 0.1% (=1 g/l)    0.808,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.33

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.47, 27.39, 21.23]

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:92.4769
Grand average of hydropathicity (GRAVY):-0.02