Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1287
Number of amino acids:99
Molecular Weight:10310.13 Da
Theoretical pI:6.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1212.12%
Cysteine CYS (C)66.06%
Glutamic Acid GLU (E)33.03%
Aspartic Acid ASP (D)55.05%
Glycine GLY (G)77.07%
Phynylalanine PHE (F)44.04%
Isoleucine ILE (I)66.06%
Histidine HIS (H)11.01%
Lysine LYS (K)88.08%
Methionine MET (M)22.02%
Leucine LEU (L)1010.1%
Asparagine ASN (N)44.04%
Glutamine GLN (Q)11.01%
Proline PRO (P)55.05%
Serine SER (S)55.05%
Arginine ARG (R)00%
Threonine THR (T)99.09%
Tryptophan TRP (W)00%
Valine VAL (V)99.09%
Tyrosine TYR (Y)22.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC459
HydrogenH746
NitrogenN114
OxygenO137
SulphurS8

FormulaC459H746N114O137S8
Total Number of Atoms:1464


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):8
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    3355
Absorption 0.1% (=1 g/l)    0.325,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.289,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 16.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.31, 21.21, 27.27]

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:101.515
Grand average of hydropathicity (GRAVY):0.51