Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2702
Number of amino acids:45
Molecular Weight:5119.37 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.44%
Cysteine CYS (C)48.89%
Glutamic Acid GLU (E)24.44%
Aspartic Acid ASP (D)00%
Glycine GLY (G)24.44%
Phynylalanine PHE (F)36.67%
Isoleucine ILE (I)511.11%
Histidine HIS (H)00%
Lysine LYS (K)24.44%
Methionine MET (M)36.67%
Leucine LEU (L)715.56%
Asparagine ASN (N)24.44%
Glutamine GLN (Q)00%
Proline PRO (P)12.22%
Serine SER (S)48.89%
Arginine ARG (R)36.67%
Threonine THR (T)00%
Tryptophan TRP (W)12.22%
Valine VAL (V)48.89%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC232
HydrogenH383
NitrogenN59
OxygenO56
SulphurS7

FormulaC232H383N59O56S7
Total Number of Atoms:737


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5750
Absorption 0.1% (=1 g/l)    1.123,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.074,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.81

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[44.44, 20.00, 31.11]

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:134.222
Grand average of hydropathicity (GRAVY):1.15