Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5489
Number of amino acids:330
Molecular Weight:36504.84 Da
Theoretical pI:6.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)123.64%
Cysteine CYS (C)92.73%
Glutamic Acid GLU (E)92.73%
Aspartic Acid ASP (D)195.76%
Glycine GLY (G)206.06%
Phynylalanine PHE (F)216.36%
Isoleucine ILE (I)185.45%
Histidine HIS (H)51.52%
Lysine LYS (K)185.45%
Methionine MET (M)20.61%
Leucine LEU (L)5215.76%
Asparagine ASN (N)247.27%
Glutamine GLN (Q)144.24%
Proline PRO (P)195.76%
Serine SER (S)3510.61%
Arginine ARG (R)82.42%
Threonine THR (T)206.06%
Tryptophan TRP (W)30.91%
Valine VAL (V)144.24%
Tyrosine TYR (Y)82.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1650
HydrogenH2581
NitrogenN423
OxygenO488
SulphurS11

FormulaC1650H2581N423O488S11
Total Number of Atoms:5153


Total number of positively charged residues (ARG + LYS):26
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    28920
Absorption 0.1% (=1 g/l)    0.792,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    0.779,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.07

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.15, 29.70, 22.73]

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:98.6668
Grand average of hydropathicity (GRAVY):-0.01