Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5628
Number of amino acids:102
Molecular Weight:10357.17 Da
Theoretical pI:6.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1918.63%
Cysteine CYS (C)87.84%
Glutamic Acid GLU (E)32.94%
Aspartic Acid ASP (D)32.94%
Glycine GLY (G)1110.78%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)21.96%
Histidine HIS (H)32.94%
Lysine LYS (K)32.94%
Methionine MET (M)87.84%
Leucine LEU (L)76.86%
Asparagine ASN (N)32.94%
Glutamine GLN (Q)43.92%
Proline PRO (P)65.88%
Serine SER (S)43.92%
Arginine ARG (R)32.94%
Threonine THR (T)32.94%
Tryptophan TRP (W)00%
Valine VAL (V)98.82%
Tyrosine TYR (Y)32.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC436
HydrogenH711
NitrogenN127
OxygenO132
SulphurS16

FormulaC436H711N127O132S16
Total Number of Atoms:1422


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):6
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    4970
Absorption 0.1% (=1 g/l)    0.480,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.432,   assuming all CYS residues are reduced
Aromaticity:0.029

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.54

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.59, 23.53, 36.27]

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:78.6275
Grand average of hydropathicity (GRAVY):0.39