Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4772
Number of amino acids:102
Molecular Weight:10896.89 Da
Theoretical pI:9.62


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)54.9%
Cysteine CYS (C)87.84%
Glutamic Acid GLU (E)10.98%
Aspartic Acid ASP (D)21.96%
Glycine GLY (G)87.84%
Phynylalanine PHE (F)21.96%
Isoleucine ILE (I)76.86%
Histidine HIS (H)21.96%
Lysine LYS (K)1110.78%
Methionine MET (M)32.94%
Leucine LEU (L)76.86%
Asparagine ASN (N)32.94%
Glutamine GLN (Q)43.92%
Proline PRO (P)43.92%
Serine SER (S)1110.78%
Arginine ARG (R)32.94%
Threonine THR (T)1211.76%
Tryptophan TRP (W)10.98%
Valine VAL (V)76.86%
Tyrosine TYR (Y)10.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC469
HydrogenH788
NitrogenN134
OxygenO140
SulphurS11

FormulaC469H788N134O140S11
Total Number of Atoms:1542


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.687,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.641,   assuming all CYS residues are reduced
Aromaticity:0.039

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.51, 25.49, 15.69]

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:78.3334
Grand average of hydropathicity (GRAVY):0.01