Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5220
Number of amino acids:169
Molecular Weight:17403.37 Da
Theoretical pI:5.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2213.02%
Cysteine CYS (C)105.92%
Glutamic Acid GLU (E)10.59%
Aspartic Acid ASP (D)84.73%
Glycine GLY (G)2011.83%
Phynylalanine PHE (F)105.92%
Isoleucine ILE (I)84.73%
Histidine HIS (H)31.78%
Lysine LYS (K)21.18%
Methionine MET (M)21.18%
Leucine LEU (L)95.33%
Asparagine ASN (N)137.69%
Glutamine GLN (Q)52.96%
Proline PRO (P)74.14%
Serine SER (S)169.47%
Arginine ARG (R)52.96%
Threonine THR (T)137.69%
Tryptophan TRP (W)21.18%
Valine VAL (V)84.73%
Tyrosine TYR (Y)52.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC754
HydrogenH1144
NitrogenN212
OxygenO240
SulphurS12

FormulaC754H1144N212O240S12
Total Number of Atoms:2362


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19075
Absorption 0.1% (=1 g/l)    1.096,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    1.060,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.14

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.85, 33.14, 20.12]

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:65.9764
Grand average of hydropathicity (GRAVY):0.10