Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4492
Number of amino acids:482
Molecular Weight:54358.82 Da
Theoretical pI:8.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)224.56%
Cysteine CYS (C)91.87%
Glutamic Acid GLU (E)193.94%
Aspartic Acid ASP (D)234.77%
Glycine GLY (G)377.68%
Phynylalanine PHE (F)255.19%
Isoleucine ILE (I)296.02%
Histidine HIS (H)132.7%
Lysine LYS (K)306.22%
Methionine MET (M)81.66%
Leucine LEU (L)418.51%
Asparagine ASN (N)316.43%
Glutamine GLN (Q)224.56%
Proline PRO (P)296.02%
Serine SER (S)347.05%
Arginine ARG (R)163.32%
Threonine THR (T)336.85%
Tryptophan TRP (W)102.07%
Valine VAL (V)285.81%
Tyrosine TYR (Y)234.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2463
HydrogenH3751
NitrogenN649
OxygenO710
SulphurS17

FormulaC2463H3751N649O710S17
Total Number of Atoms:7590


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    89770
Absorption 0.1% (=1 g/l)    1.651,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89270
Absorption 0.1% (=1 g/l)    1.642,   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 : 42.57

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.37, 27.18, 18.67]

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:78.0498
Grand average of hydropathicity (GRAVY):-0.34