Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5684
Number of amino acids:320
Molecular Weight:35382.84 Da
Theoretical pI:8.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)175.31%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)144.38%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)144.38%
Isoleucine ILE (I)278.44%
Histidine HIS (H)10.31%
Lysine LYS (K)237.19%
Methionine MET (M)51.56%
Leucine LEU (L)278.44%
Asparagine ASN (N)165%
Glutamine GLN (Q)175.31%
Proline PRO (P)247.5%
Serine SER (S)216.56%
Arginine ARG (R)134.06%
Threonine THR (T)123.75%
Tryptophan TRP (W)10.31%
Valine VAL (V)288.75%
Tyrosine TYR (Y)134.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1605
HydrogenH2550
NitrogenN418
OxygenO466
SulphurS7

FormulaC1605H2550N418O466S7
Total Number of Atoms:5046


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24995
Absorption 0.1% (=1 g/l)    0.706,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24870
Absorption 0.1% (=1 g/l)    0.703,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.38, 27.19, 21.25]

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:96.5
Grand average of hydropathicity (GRAVY):-0.15