Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5705
Number of amino acids:320
Molecular Weight:35156.66 Da
Theoretical pI:8.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.25%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)123.75%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)144.38%
Isoleucine ILE (I)309.38%
Histidine HIS (H)20.63%
Lysine LYS (K)226.88%
Methionine MET (M)51.56%
Leucine LEU (L)257.81%
Asparagine ASN (N)185.63%
Glutamine GLN (Q)175.31%
Proline PRO (P)257.81%
Serine SER (S)195.94%
Arginine ARG (R)123.75%
Threonine THR (T)123.75%
Tryptophan TRP (W)10.31%
Valine VAL (V)288.75%
Tyrosine TYR (Y)113.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1595
HydrogenH2540
NitrogenN418
OxygenO460
SulphurS7

FormulaC1595H2540N418O460S7
Total Number of Atoms:5020


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22015
Absorption 0.1% (=1 g/l)    0.626,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.623,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.57

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.06, 27.50, 21.56]

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:98.6562
Grand average of hydropathicity (GRAVY):-0.09