Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5843
Number of amino acids:135
Molecular Weight:14827.11 Da
Theoretical pI:5.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)96.67%
Cysteine CYS (C)21.48%
Glutamic Acid GLU (E)107.41%
Aspartic Acid ASP (D)75.19%
Glycine GLY (G)96.67%
Phynylalanine PHE (F)64.44%
Isoleucine ILE (I)85.93%
Histidine HIS (H)21.48%
Lysine LYS (K)107.41%
Methionine MET (M)53.7%
Leucine LEU (L)118.15%
Asparagine ASN (N)21.48%
Glutamine GLN (Q)32.22%
Proline PRO (P)42.96%
Serine SER (S)1611.85%
Arginine ARG (R)53.7%
Threonine THR (T)64.44%
Tryptophan TRP (W)10.74%
Valine VAL (V)1511.11%
Tyrosine TYR (Y)42.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC661
HydrogenH1058
NitrogenN170
OxygenO201
SulphurS7

FormulaC661H1058N170O201S7
Total Number of Atoms:2097


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11585
Absorption 0.1% (=1 g/l)    0.781,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.773,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 22.96, 25.93]

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:93.7778
Grand average of hydropathicity (GRAVY):0.08