Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6103
Number of amino acids:147
Molecular Weight:16221.24 Da
Theoretical pI:6.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)149.52%
Cysteine CYS (C)74.76%
Glutamic Acid GLU (E)21.36%
Aspartic Acid ASP (D)96.12%
Glycine GLY (G)128.16%
Phynylalanine PHE (F)42.72%
Isoleucine ILE (I)42.72%
Histidine HIS (H)21.36%
Lysine LYS (K)32.04%
Methionine MET (M)42.72%
Leucine LEU (L)117.48%
Asparagine ASN (N)149.52%
Glutamine GLN (Q)96.12%
Proline PRO (P)42.72%
Serine SER (S)64.08%
Arginine ARG (R)85.44%
Threonine THR (T)128.16%
Tryptophan TRP (W)42.72%
Valine VAL (V)128.16%
Tyrosine TYR (Y)64.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC702
HydrogenH1085
NitrogenN205
OxygenO217
SulphurS11

FormulaC702H1085N205O217S11
Total Number of Atoms:2220


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31315
Absorption 0.1% (=1 g/l)    1.930,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30940
Absorption 0.1% (=1 g/l)    1.907,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 15.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.89, 24.49, 21.09]

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:72.9932
Grand average of hydropathicity (GRAVY):-0.25