Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2860
Number of amino acids:12
Molecular Weight:1211.25 Da
Theoretical pI:5.93


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)216.67%
Glycine GLY (G)325%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)18.33%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)00%
Serine SER (S)216.67%
Arginine ARG (R)18.33%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)18.33%
Tyrosine TYR (Y)18.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC49
HydrogenH78
NitrogenN16
OxygenO20
SulphurS0

FormulaC49H78N16O20S0
Total Number of Atoms:163


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):2
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    1490
Absorption 0.1% (=1 g/l)    1.230
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 3.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.67, 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:32.5
Grand average of hydropathicity (GRAVY):-1.12