Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5336
Number of amino acids:319
Molecular Weight:35281.9 Da
Theoretical pI:9.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.64%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)185.64%
Aspartic Acid ASP (D)123.76%
Glycine GLY (G)268.15%
Phynylalanine PHE (F)103.13%
Isoleucine ILE (I)288.78%
Histidine HIS (H)30.94%
Lysine LYS (K)247.52%
Methionine MET (M)61.88%
Leucine LEU (L)299.09%
Asparagine ASN (N)206.27%
Glutamine GLN (Q)185.64%
Proline PRO (P)247.52%
Serine SER (S)154.7%
Arginine ARG (R)134.08%
Threonine THR (T)144.39%
Tryptophan TRP (W)10.31%
Valine VAL (V)268.15%
Tyrosine TYR (Y)123.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1592
HydrogenH2559
NitrogenN427
OxygenO459
SulphurS8

FormulaC1592H2559N427O459S8
Total Number of Atoms:5045


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23505
Absorption 0.1% (=1 g/l)    0.666,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.663,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.23, 26.65, 22.26]

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:98.9655
Grand average of hydropathicity (GRAVY):-0.20