Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4780
Number of amino acids:89
Molecular Weight:10016.08 Da
Theoretical pI:9.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.12%
Cysteine CYS (C)88.99%
Glutamic Acid GLU (E)22.25%
Aspartic Acid ASP (D)33.37%
Glycine GLY (G)77.87%
Phynylalanine PHE (F)66.74%
Isoleucine ILE (I)66.74%
Histidine HIS (H)00%
Lysine LYS (K)1314.61%
Methionine MET (M)11.12%
Leucine LEU (L)88.99%
Asparagine ASN (N)44.49%
Glutamine GLN (Q)44.49%
Proline PRO (P)55.62%
Serine SER (S)55.62%
Arginine ARG (R)22.25%
Threonine THR (T)33.37%
Tryptophan TRP (W)22.25%
Valine VAL (V)88.99%
Tyrosine TYR (Y)11.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC455
HydrogenH732
NitrogenN118
OxygenO117
SulphurS9

FormulaC455H732N118O117S9
Total Number of Atoms:1431


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12990
Absorption 0.1% (=1 g/l)    1.297,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    1.247,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.83, 23.60, 13.48]

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:88.5393
Grand average of hydropathicity (GRAVY):0.07