Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4784
Number of amino acids:96
Molecular Weight:10990.8 Da
Theoretical pI:8.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.17%
Cysteine CYS (C)1111.46%
Glutamic Acid GLU (E)77.29%
Aspartic Acid ASP (D)33.13%
Glycine GLY (G)33.13%
Phynylalanine PHE (F)44.17%
Isoleucine ILE (I)33.13%
Histidine HIS (H)33.13%
Lysine LYS (K)1010.42%
Methionine MET (M)33.13%
Leucine LEU (L)66.25%
Asparagine ASN (N)44.17%
Glutamine GLN (Q)66.25%
Proline PRO (P)77.29%
Serine SER (S)66.25%
Arginine ARG (R)22.08%
Threonine THR (T)55.21%
Tryptophan TRP (W)22.08%
Valine VAL (V)55.21%
Tyrosine TYR (Y)22.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC477
HydrogenH746
NitrogenN130
OxygenO140
SulphurS14

FormulaC477H746N130O140S14
Total Number of Atoms:1507


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14605
Absorption 0.1% (=1 g/l)    1.329,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    1.272,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.92, 20.83, 20.83]

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:55.8333
Grand average of hydropathicity (GRAVY):-0.46