Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5114
Number of amino acids:108
Molecular Weight:11814.32 Da
Theoretical pI:4.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1412.96%
Cysteine CYS (C)32.78%
Glutamic Acid GLU (E)65.56%
Aspartic Acid ASP (D)65.56%
Glycine GLY (G)65.56%
Phynylalanine PHE (F)76.48%
Isoleucine ILE (I)87.41%
Histidine HIS (H)21.85%
Lysine LYS (K)65.56%
Methionine MET (M)43.7%
Leucine LEU (L)87.41%
Asparagine ASN (N)1513.89%
Glutamine GLN (Q)32.78%
Proline PRO (P)21.85%
Serine SER (S)65.56%
Arginine ARG (R)21.85%
Threonine THR (T)43.7%
Tryptophan TRP (W)10.93%
Valine VAL (V)43.7%
Tyrosine TYR (Y)10.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC515
HydrogenH803
NitrogenN143
OxygenO162
SulphurS7

FormulaC515H803N143O162S7
Total Number of Atoms:1630


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7115
Absorption 0.1% (=1 g/l)    0.602,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.592,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.85, 26.85, 29.63]

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:81.4815
Grand average of hydropathicity (GRAVY):-0.15