Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4749
Number of amino acids:84
Molecular Weight:9307.09 Da
Theoretical pI:6.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)78.33%
Cysteine CYS (C)1011.9%
Glutamic Acid GLU (E)89.52%
Aspartic Acid ASP (D)22.38%
Glycine GLY (G)67.14%
Phynylalanine PHE (F)22.38%
Isoleucine ILE (I)55.95%
Histidine HIS (H)11.19%
Lysine LYS (K)78.33%
Methionine MET (M)22.38%
Leucine LEU (L)1011.9%
Asparagine ASN (N)00%
Glutamine GLN (Q)33.57%
Proline PRO (P)33.57%
Serine SER (S)44.76%
Arginine ARG (R)33.57%
Threonine THR (T)22.38%
Tryptophan TRP (W)11.19%
Valine VAL (V)55.95%
Tyrosine TYR (Y)33.57%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC408
HydrogenH660
NitrogenN106
OxygenO117
SulphurS12

FormulaC408H660N106O117S12
Total Number of Atoms:1303


Total number of positively charged residues (ARG + LYS):10
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    10595
Absorption 0.1% (=1 g/l)    1.138,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.071,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 83.98

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.95, 15.48, 32.14]

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:95.2382
Grand average of hydropathicity (GRAVY):0.27