Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5869
Number of amino acids:199
Molecular Weight:21301.22 Da
Theoretical pI:6.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)105.03%
Cysteine CYS (C)42.01%
Glutamic Acid GLU (E)42.01%
Aspartic Acid ASP (D)94.52%
Glycine GLY (G)147.04%
Phynylalanine PHE (F)105.03%
Isoleucine ILE (I)52.51%
Histidine HIS (H)63.02%
Lysine LYS (K)84.02%
Methionine MET (M)21.01%
Leucine LEU (L)3115.58%
Asparagine ASN (N)2010.05%
Glutamine GLN (Q)52.51%
Proline PRO (P)94.52%
Serine SER (S)2211.06%
Arginine ARG (R)42.01%
Threonine THR (T)168.04%
Tryptophan TRP (W)10.5%
Valine VAL (V)178.54%
Tyrosine TYR (Y)21.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC944
HydrogenH1503
NitrogenN257
OxygenO291
SulphurS6

FormulaC944H1503N257O291S6
Total Number of Atoms:3001


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8730
Absorption 0.1% (=1 g/l)    0.410,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.398,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.17, 32.66, 23.62]

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:100.352
Grand average of hydropathicity (GRAVY):0.09