Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2891
Number of amino acids:12
Molecular Weight:1354.48 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)18.33%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)18.33%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)18.33%
Proline PRO (P)433.33%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)216.67%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)325%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC65
HydrogenH87
NitrogenN13
OxygenO19
SulphurS0

FormulaC65H87N13O19S0
Total Number of Atoms:184


Total number of positively charged residues (ARG + LYS):0
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    3.300
Aromaticity:0.250

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 41.67, 8.33]

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:8.33333
Grand average of hydropathicity (GRAVY):-1.15