Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5334
Number of amino acids:319
Molecular Weight:35237.03 Da
Theoretical pI:8.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.52%
Cysteine CYS (C)30.94%
Glutamic Acid GLU (E)185.64%
Aspartic Acid ASP (D)144.39%
Glycine GLY (G)226.9%
Phynylalanine PHE (F)134.08%
Isoleucine ILE (I)3210.03%
Histidine HIS (H)10.31%
Lysine LYS (K)278.46%
Methionine MET (M)61.88%
Leucine LEU (L)247.52%
Asparagine ASN (N)175.33%
Glutamine GLN (Q)185.64%
Proline PRO (P)247.52%
Serine SER (S)175.33%
Arginine ARG (R)92.82%
Threonine THR (T)82.51%
Tryptophan TRP (W)20.63%
Valine VAL (V)288.78%
Tyrosine TYR (Y)123.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1607
HydrogenH2560
NitrogenN412
OxygenO456
SulphurS9

FormulaC1607H2560N412O456S9
Total Number of Atoms:5044


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29005
Absorption 0.1% (=1 g/l)    0.823,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28880
Absorption 0.1% (=1 g/l)    0.820,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.80, 25.08, 22.57]

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:101.442
Grand average of hydropathicity (GRAVY):-0.05