Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2510
Number of amino acids:27
Molecular Weight:3073.64 Da
Theoretical pI:5.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.7%
Cysteine CYS (C)622.22%
Glutamic Acid GLU (E)13.7%
Aspartic Acid ASP (D)311.11%
Glycine GLY (G)27.41%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)311.11%
Histidine HIS (H)13.7%
Lysine LYS (K)13.7%
Methionine MET (M)27.41%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)13.7%
Proline PRO (P)13.7%
Serine SER (S)13.7%
Arginine ARG (R)27.41%
Threonine THR (T)00%
Tryptophan TRP (W)13.7%
Valine VAL (V)13.7%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC123
HydrogenH198
NitrogenN38
OxygenO38
SulphurS8

FormulaC123H198N38O38S8
Total Number of Atoms:405


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    1.911,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.789,   assuming all CYS residues are reduced
Aromaticity:0.037

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.72

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.52, 14.81, 14.81]

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:57.7777
Grand average of hydropathicity (GRAVY):0.02