Physicochemical Properties of Peptide



PPepDB ID:PPepDB_584
Number of amino acids:90
Molecular Weight:9697.17 Da
Theoretical pI:6.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1213.33%
Cysteine CYS (C)66.67%
Glutamic Acid GLU (E)44.44%
Aspartic Acid ASP (D)55.56%
Glycine GLY (G)55.56%
Phynylalanine PHE (F)44.44%
Isoleucine ILE (I)77.78%
Histidine HIS (H)22.22%
Lysine LYS (K)77.78%
Methionine MET (M)00%
Leucine LEU (L)910%
Asparagine ASN (N)66.67%
Glutamine GLN (Q)11.11%
Proline PRO (P)33.33%
Serine SER (S)66.67%
Arginine ARG (R)11.11%
Threonine THR (T)44.44%
Tryptophan TRP (W)11.11%
Valine VAL (V)44.44%
Tyrosine TYR (Y)33.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC432
HydrogenH678
NitrogenN112
OxygenO129
SulphurS6

FormulaC432H678N112O129S6
Total Number of Atoms:1357


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10345
Absorption 0.1% (=1 g/l)    1.067,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.028,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.11, 22.22, 27.78]

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:95.5555
Grand average of hydropathicity (GRAVY):0.19