Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5340
Number of amino acids:319
Molecular Weight:35208.74 Da
Theoretical pI:8.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)185.64%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.96%
Aspartic Acid ASP (D)134.08%
Glycine GLY (G)278.46%
Phynylalanine PHE (F)134.08%
Isoleucine ILE (I)3310.34%
Histidine HIS (H)20.63%
Lysine LYS (K)237.21%
Methionine MET (M)30.94%
Leucine LEU (L)268.15%
Asparagine ASN (N)175.33%
Glutamine GLN (Q)175.33%
Proline PRO (P)247.52%
Serine SER (S)165.02%
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
CarbonC1601
HydrogenH2556
NitrogenN420
OxygenO460
SulphurS5

FormulaC1601H2556N420O460S5
Total Number of Atoms:5042


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    23505
Absorption 0.1% (=1 g/l)    0.668,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.664,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.80, 26.33, 20.69]

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:101.411
Grand average of hydropathicity (GRAVY):-0.12