Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4944
Number of amino acids:265
Molecular Weight:29722.48 Da
Theoretical pI:6.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.28%
Cysteine CYS (C)103.77%
Glutamic Acid GLU (E)124.53%
Aspartic Acid ASP (D)72.64%
Glycine GLY (G)83.02%
Phynylalanine PHE (F)186.79%
Isoleucine ILE (I)134.91%
Histidine HIS (H)10.38%
Lysine LYS (K)41.51%
Methionine MET (M)41.51%
Leucine LEU (L)269.81%
Asparagine ASN (N)197.17%
Glutamine GLN (Q)134.91%
Proline PRO (P)166.04%
Serine SER (S)3613.58%
Arginine ARG (R)155.66%
Threonine THR (T)269.81%
Tryptophan TRP (W)10.38%
Valine VAL (V)103.77%
Tyrosine TYR (Y)124.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1314
HydrogenH2027
NitrogenN349
OxygenO410
SulphurS14

FormulaC1314H2027N349O410S14
Total Number of Atoms:4114


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24005
Absorption 0.1% (=1 g/l)    0.808,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.787,   assuming all CYS residues are reduced
Aromaticity:0.117

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 58.82

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.19, 29.81, 21.13]

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:73.6226
Grand average of hydropathicity (GRAVY):-0.19