Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5561
Number of amino acids:97
Molecular Weight:11114.71 Da
Theoretical pI:8.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.03%
Cysteine CYS (C)99.28%
Glutamic Acid GLU (E)44.12%
Aspartic Acid ASP (D)33.09%
Glycine GLY (G)1010.31%
Phynylalanine PHE (F)77.22%
Isoleucine ILE (I)55.15%
Histidine HIS (H)22.06%
Lysine LYS (K)55.15%
Methionine MET (M)11.03%
Leucine LEU (L)77.22%
Asparagine ASN (N)66.19%
Glutamine GLN (Q)55.15%
Proline PRO (P)44.12%
Serine SER (S)88.25%
Arginine ARG (R)77.22%
Threonine THR (T)44.12%
Tryptophan TRP (W)22.06%
Valine VAL (V)33.09%
Tyrosine TYR (Y)44.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC488
HydrogenH742
NitrogenN140
OxygenO139
SulphurS10

FormulaC488H742N140O139S10
Total Number of Atoms:1519


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17460
Absorption 0.1% (=1 g/l)    1.571,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    1.526,   assuming all CYS residues are reduced
Aromaticity:0.134

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.87, 28.87, 13.40]

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:58.2474
Grand average of hydropathicity (GRAVY):-0.41