Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2691
Number of amino acids:12
Molecular Weight:1402.69 Da
Theoretical pI:8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)18.33%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)18.33%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)216.67%
Histidine HIS (H)18.33%
Lysine LYS (K)18.33%
Methionine MET (M)18.33%
Leucine LEU (L)18.33%
Asparagine ASN (N)00%
Glutamine GLN (Q)18.33%
Proline PRO (P)00%
Serine SER (S)216.67%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)18.33%
Valine VAL (V)00%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC62
HydrogenH99
NitrogenN17
OxygenO16
SulphurS2

FormulaC62H99N17O16S2
Total Number of Atoms:196


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.921,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    3.921,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 25.00, 16.67]

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:97.5001
Grand average of hydropathicity (GRAVY):0.31