Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1049
Number of amino acids:115
Molecular Weight:12438.69 Da
Theoretical pI:6.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)97.83%
Cysteine CYS (C)65.22%
Glutamic Acid GLU (E)76.09%
Aspartic Acid ASP (D)43.48%
Glycine GLY (G)54.35%
Phynylalanine PHE (F)54.35%
Isoleucine ILE (I)1210.43%
Histidine HIS (H)00%
Lysine LYS (K)108.7%
Methionine MET (M)32.61%
Leucine LEU (L)1210.43%
Asparagine ASN (N)86.96%
Glutamine GLN (Q)10.87%
Proline PRO (P)65.22%
Serine SER (S)119.57%
Arginine ARG (R)10.87%
Threonine THR (T)54.35%
Tryptophan TRP (W)10.87%
Valine VAL (V)86.96%
Tyrosine TYR (Y)10.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC556
HydrogenH908
NitrogenN138
OxygenO164
SulphurS9

FormulaC556H908N138O164S9
Total Number of Atoms:1775


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    0.592,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.562,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.91, 26.09, 26.96]

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:109.391
Grand average of hydropathicity (GRAVY):0.39