Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3862
Number of amino acids:91
Molecular Weight:9125.64 Da
Theoretical pI:9.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)99.89%
Cysteine CYS (C)88.79%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)33.3%
Glycine GLY (G)1314.29%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)55.49%
Histidine HIS (H)11.1%
Lysine LYS (K)77.69%
Methionine MET (M)11.1%
Leucine LEU (L)77.69%
Asparagine ASN (N)55.49%
Glutamine GLN (Q)22.2%
Proline PRO (P)77.69%
Serine SER (S)66.59%
Arginine ARG (R)22.2%
Threonine THR (T)66.59%
Tryptophan TRP (W)00%
Valine VAL (V)66.59%
Tyrosine TYR (Y)33.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC390
HydrogenH645
NitrogenN113
OxygenO120
SulphurS9

FormulaC390H645N113O120S9
Total Number of Atoms:1277


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):3
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    4970
Absorption 0.1% (=1 g/l)    0.545,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.490,   assuming all CYS residues are reduced
Aromaticity:0.033

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.08, 34.07, 18.68]

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:80.4396
Grand average of hydropathicity (GRAVY):0.10