Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5639
Number of amino acids:317
Molecular Weight:34291.7 Da
Theoretical pI:8.62


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)309.46%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)206.31%
Aspartic Acid ASP (D)92.84%
Glycine GLY (G)268.2%
Phynylalanine PHE (F)123.79%
Isoleucine ILE (I)175.36%
Histidine HIS (H)10.32%
Lysine LYS (K)257.89%
Methionine MET (M)51.58%
Leucine LEU (L)288.83%
Asparagine ASN (N)216.62%
Glutamine GLN (Q)206.31%
Proline PRO (P)247.57%
Serine SER (S)113.47%
Arginine ARG (R)72.21%
Threonine THR (T)103.15%
Tryptophan TRP (W)00%
Valine VAL (V)3711.67%
Tyrosine TYR (Y)123.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1555
HydrogenH2484
NitrogenN406
OxygenO450
SulphurS7

FormulaC1555H2484N406O450S7
Total Number of Atoms:4902


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):29
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    18005
Absorption 0.1% (=1 g/l)    0.525,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17880
Absorption 0.1% (=1 g/l)    0.521,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.44, 25.87, 26.18]

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:98.675
Grand average of hydropathicity (GRAVY):-0.05