Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1017
Number of amino acids:142
Molecular Weight:15009.54 Da
Theoretical pI:6.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)149.86%
Cysteine CYS (C)1510.56%
Glutamic Acid GLU (E)64.23%
Aspartic Acid ASP (D)53.52%
Glycine GLY (G)128.45%
Phynylalanine PHE (F)32.11%
Isoleucine ILE (I)74.93%
Histidine HIS (H)10.7%
Lysine LYS (K)74.93%
Methionine MET (M)64.23%
Leucine LEU (L)96.34%
Asparagine ASN (N)96.34%
Glutamine GLN (Q)53.52%
Proline PRO (P)74.93%
Serine SER (S)85.63%
Arginine ARG (R)42.82%
Threonine THR (T)74.93%
Tryptophan TRP (W)10.7%
Valine VAL (V)139.15%
Tyrosine TYR (Y)32.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC637
HydrogenH1032
NitrogenN178
OxygenO197
SulphurS21

FormulaC637H1032N178O197S21
Total Number of Atoms:2065


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10845
Absorption 0.1% (=1 g/l)    0.723,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.664,   assuming all CYS residues are reduced
Aromaticity:0.049

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.35, 25.35, 24.65]

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:80.3521
Grand average of hydropathicity (GRAVY):0.24