Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4971
Number of amino acids:259
Molecular Weight:29153.07 Da
Theoretical pI:5.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)155.79%
Cysteine CYS (C)166.18%
Glutamic Acid GLU (E)155.79%
Aspartic Acid ASP (D)155.79%
Glycine GLY (G)197.34%
Phynylalanine PHE (F)114.25%
Isoleucine ILE (I)103.86%
Histidine HIS (H)72.7%
Lysine LYS (K)145.41%
Methionine MET (M)41.54%
Leucine LEU (L)238.88%
Asparagine ASN (N)93.47%
Glutamine GLN (Q)62.32%
Proline PRO (P)145.41%
Serine SER (S)238.88%
Arginine ARG (R)124.63%
Threonine THR (T)145.41%
Tryptophan TRP (W)62.32%
Valine VAL (V)124.63%
Tyrosine TYR (Y)145.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1294
HydrogenH1960
NitrogenN344
OxygenO386
SulphurS20

FormulaC1294H1960N344O386S20
Total Number of Atoms:4004


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    54860
Absorption 0.1% (=1 g/l)    1.882,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53860
Absorption 0.1% (=1 g/l)    1.847,   assuming all CYS residues are reduced
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.34, 25.10, 22.01]

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:68.9189
Grand average of hydropathicity (GRAVY):-0.32