Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5988
Number of amino acids:123
Molecular Weight:13261.32 Da
Theoretical pI:8.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)118.94%
Cysteine CYS (C)64.88%
Glutamic Acid GLU (E)21.63%
Aspartic Acid ASP (D)54.07%
Glycine GLY (G)97.32%
Phynylalanine PHE (F)97.32%
Isoleucine ILE (I)86.5%
Histidine HIS (H)21.63%
Lysine LYS (K)64.88%
Methionine MET (M)32.44%
Leucine LEU (L)54.07%
Asparagine ASN (N)43.25%
Glutamine GLN (Q)21.63%
Proline PRO (P)86.5%
Serine SER (S)129.76%
Arginine ARG (R)43.25%
Threonine THR (T)108.13%
Tryptophan TRP (W)10.81%
Valine VAL (V)118.94%
Tyrosine TYR (Y)54.07%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC598
HydrogenH918
NitrogenN152
OxygenO171
SulphurS9

FormulaC598H918N152O171S9
Total Number of Atoms:1848


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13325
Absorption 0.1% (=1 g/l)    1.005,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.977,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.71, 26.83, 17.07]

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:76.0976
Grand average of hydropathicity (GRAVY):0.27