Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4583
Number of amino acids:310
Molecular Weight:34693.81 Da
Theoretical pI:8.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.81%
Cysteine CYS (C)41.29%
Glutamic Acid GLU (E)196.13%
Aspartic Acid ASP (D)185.81%
Glycine GLY (G)216.77%
Phynylalanine PHE (F)103.23%
Isoleucine ILE (I)175.48%
Histidine HIS (H)20.65%
Lysine LYS (K)3410.97%
Methionine MET (M)123.87%
Leucine LEU (L)258.06%
Asparagine ASN (N)165.16%
Glutamine GLN (Q)82.58%
Proline PRO (P)123.87%
Serine SER (S)247.74%
Arginine ARG (R)92.9%
Threonine THR (T)258.06%
Tryptophan TRP (W)30.97%
Valine VAL (V)185.81%
Tyrosine TYR (Y)154.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1541
HydrogenH2454
NitrogenN402
OxygenO473
SulphurS16

FormulaC1541H2454N402O473S16
Total Number of Atoms:4886


Total number of positively charged residues (ARG + LYS):43
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39100
Absorption 0.1% (=1 g/l)    1.127,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38850
Absorption 0.1% (=1 g/l)    1.120,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.39, 23.55, 23.87]

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:75.4839
Grand average of hydropathicity (GRAVY):-0.45