Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3820
Number of amino acids:15
Molecular Weight:1710.94 Da
Theoretical pI:8.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)16.67%
Cysteine CYS (C)213.33%
Glutamic Acid GLU (E)16.67%
Aspartic Acid ASP (D)00%
Glycine GLY (G)16.67%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)16.67%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)16.67%
Asparagine ASN (N)213.33%
Glutamine GLN (Q)00%
Proline PRO (P)16.67%
Serine SER (S)00%
Arginine ARG (R)213.33%
Threonine THR (T)213.33%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)16.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC70
HydrogenH115
NitrogenN23
OxygenO23
SulphurS2

FormulaC70H115N23O23S2
Total Number of Atoms:233


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
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    1615
Absorption 0.1% (=1 g/l)    0.944,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.871,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : -18.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.00, 26.67, 20.00]

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:58.6667
Grand average of hydropathicity (GRAVY):-0.61