Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3912
Number of amino acids:46
Molecular Weight:5095.03 Da
Theoretical pI:9.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.35%
Cysteine CYS (C)817.39%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)24.35%
Glycine GLY (G)24.35%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)36.52%
Histidine HIS (H)00%
Lysine LYS (K)613.04%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)36.52%
Glutamine GLN (Q)00%
Proline PRO (P)510.87%
Serine SER (S)24.35%
Arginine ARG (R)48.7%
Threonine THR (T)510.87%
Tryptophan TRP (W)00%
Valine VAL (V)24.35%
Tyrosine TYR (Y)24.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC211
HydrogenH355
NitrogenN67
OxygenO63
SulphurS8

FormulaC211H355N67O63S8
Total Number of Atoms:704


Total number of positively charged residues (ARG + LYS):10
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    3480
Absorption 0.1% (=1 g/l)    0.683,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.585,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.25

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[15.22, 26.09, 4.35]

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:42.3913
Grand average of hydropathicity (GRAVY):-0.65