Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5554
Number of amino acids:355
Molecular Weight:37812.24 Da
Theoretical pI:6.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)349.58%
Cysteine CYS (C)102.82%
Glutamic Acid GLU (E)154.23%
Aspartic Acid ASP (D)133.66%
Glycine GLY (G)339.3%
Phynylalanine PHE (F)174.79%
Isoleucine ILE (I)277.61%
Histidine HIS (H)164.51%
Lysine LYS (K)133.66%
Methionine MET (M)164.51%
Leucine LEU (L)4312.11%
Asparagine ASN (N)71.97%
Glutamine GLN (Q)82.25%
Proline PRO (P)102.82%
Serine SER (S)349.58%
Arginine ARG (R)92.54%
Threonine THR (T)185.07%
Tryptophan TRP (W)20.56%
Valine VAL (V)257.04%
Tyrosine TYR (Y)51.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1690
HydrogenH2696
NitrogenN444
OxygenO484
SulphurS26

FormulaC1690H2696N444O484S26
Total Number of Atoms:5340


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):28
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)    0.504,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18450
Absorption 0.1% (=1 g/l)    0.488,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.52

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.52, 23.66, 30.42]

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:106.901
Grand average of hydropathicity (GRAVY):0.52