Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4073
Number of amino acids:267
Molecular Weight:29062.9 Da
Theoretical pI:9.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4014.98%
Cysteine CYS (C)10.37%
Glutamic Acid GLU (E)20.75%
Aspartic Acid ASP (D)00%
Glycine GLY (G)20.75%
Phynylalanine PHE (F)93.37%
Isoleucine ILE (I)124.49%
Histidine HIS (H)31.12%
Lysine LYS (K)10.37%
Methionine MET (M)62.25%
Leucine LEU (L)4817.98%
Asparagine ASN (N)145.24%
Glutamine GLN (Q)5119.1%
Proline PRO (P)228.24%
Serine SER (S)197.12%
Arginine ARG (R)41.5%
Threonine THR (T)93.37%
Tryptophan TRP (W)00%
Valine VAL (V)176.37%
Tyrosine TYR (Y)72.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1318
HydrogenH2123
NitrogenN351
OxygenO372
SulphurS7

FormulaC1318H2123N351O372S7
Total Number of Atoms:4171


Total number of positively charged residues (ARG + LYS):5
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    10430
Absorption 0.1% (=1 g/l)    0.359,   assuming all pairs of CYS residues form cystines

Ext. coefficient    10430
Absorption 0.1% (=1 g/l)    0.359,   assuming all CYS residues are reduced
Aromaticity:0.060

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 64.95

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.83, 21.35, 35.96]

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:121.086
Grand average of hydropathicity (GRAVY):0.32