Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6150
Number of amino acids:86
Molecular Weight:9206.78 Da
Theoretical pI:6.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.65%
Cysteine CYS (C)910.47%
Glutamic Acid GLU (E)55.81%
Aspartic Acid ASP (D)55.81%
Glycine GLY (G)910.47%
Phynylalanine PHE (F)44.65%
Isoleucine ILE (I)33.49%
Histidine HIS (H)11.16%
Lysine LYS (K)78.14%
Methionine MET (M)22.33%
Leucine LEU (L)910.47%
Asparagine ASN (N)33.49%
Glutamine GLN (Q)11.16%
Proline PRO (P)33.49%
Serine SER (S)78.14%
Arginine ARG (R)33.49%
Threonine THR (T)22.33%
Tryptophan TRP (W)00%
Valine VAL (V)89.3%
Tyrosine TYR (Y)11.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC396
HydrogenH644
NitrogenN108
OxygenO121
SulphurS11

FormulaC396H644N108O121S11
Total Number of Atoms:1280


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):10
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    1990
Absorption 0.1% (=1 g/l)    0.216,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.162,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.07, 25.58, 23.26]

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:86.0464
Grand average of hydropathicity (GRAVY):0.19