Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6046
Number of amino acids:141
Molecular Weight:16090 Da
Theoretical pI:5.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)107.09%
Cysteine CYS (C)85.67%
Glutamic Acid GLU (E)139.22%
Aspartic Acid ASP (D)32.13%
Glycine GLY (G)64.26%
Phynylalanine PHE (F)21.42%
Isoleucine ILE (I)85.67%
Histidine HIS (H)32.13%
Lysine LYS (K)42.84%
Methionine MET (M)1812.77%
Leucine LEU (L)128.51%
Asparagine ASN (N)74.96%
Glutamine GLN (Q)85.67%
Proline PRO (P)74.96%
Serine SER (S)85.67%
Arginine ARG (R)85.67%
Threonine THR (T)64.26%
Tryptophan TRP (W)10.71%
Valine VAL (V)64.26%
Tyrosine TYR (Y)32.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC680
HydrogenH1109
NitrogenN191
OxygenO206
SulphurS26

FormulaC680H1109N191O206S26
Total Number of Atoms:2212


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10470
Absorption 0.1% (=1 g/l)    0.651,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.620,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.07

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.70, 19.86, 37.59]

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:74.7518
Grand average of hydropathicity (GRAVY):-0.10