Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1503
Number of amino acids:26
Molecular Weight:2648.07 Da
Theoretical pI:5.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.85%
Cysteine CYS (C)13.85%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)13.85%
Glycine GLY (G)415.38%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.85%
Histidine HIS (H)00%
Lysine LYS (K)13.85%
Methionine MET (M)00%
Leucine LEU (L)27.69%
Asparagine ASN (N)13.85%
Glutamine GLN (Q)00%
Proline PRO (P)27.69%
Serine SER (S)13.85%
Arginine ARG (R)00%
Threonine THR (T)415.38%
Tryptophan TRP (W)13.85%
Valine VAL (V)519.23%
Tyrosine TYR (Y)13.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC120
HydrogenH191
NitrogenN29
OxygenO36
SulphurS1

FormulaC120H191N29O36S1
Total Number of Atoms:377


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

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    2.640,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    2.640,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[38.46, 30.77, 11.54]

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:104.615
Grand average of hydropathicity (GRAVY):0.61