Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6098
Number of amino acids:118
Molecular Weight:12494.64 Da
Theoretical pI:10.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1512.71%
Cysteine CYS (C)97.63%
Glutamic Acid GLU (E)21.69%
Aspartic Acid ASP (D)10.85%
Glycine GLY (G)1210.17%
Phynylalanine PHE (F)10.85%
Isoleucine ILE (I)65.08%
Histidine HIS (H)00%
Lysine LYS (K)10.85%
Methionine MET (M)32.54%
Leucine LEU (L)1210.17%
Asparagine ASN (N)54.24%
Glutamine GLN (Q)54.24%
Proline PRO (P)43.39%
Serine SER (S)97.63%
Arginine ARG (R)1512.71%
Threonine THR (T)86.78%
Tryptophan TRP (W)00%
Valine VAL (V)75.93%
Tyrosine TYR (Y)32.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC524
HydrogenH892
NitrogenN174
OxygenO155
SulphurS12

FormulaC524H892N174O155S12
Total Number of Atoms:1757


Total number of positively charged residues (ARG + LYS):16
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)    0.398,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.358,   assuming all CYS residues are reduced
Aromaticity:0.034

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.58, 25.42, 27.12]

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:89.4069
Grand average of hydropathicity (GRAVY):0.13