Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1106
Number of amino acids:133
Molecular Weight:13850.05 Da
Theoretical pI:7.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1813.53%
Cysteine CYS (C)129.02%
Glutamic Acid GLU (E)43.01%
Aspartic Acid ASP (D)53.76%
Glycine GLY (G)86.02%
Phynylalanine PHE (F)10.75%
Isoleucine ILE (I)64.51%
Histidine HIS (H)00%
Lysine LYS (K)75.26%
Methionine MET (M)43.01%
Leucine LEU (L)118.27%
Asparagine ASN (N)96.77%
Glutamine GLN (Q)53.76%
Proline PRO (P)53.76%
Serine SER (S)129.02%
Arginine ARG (R)43.01%
Threonine THR (T)75.26%
Tryptophan TRP (W)00%
Valine VAL (V)118.27%
Tyrosine TYR (Y)43.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC584
HydrogenH966
NitrogenN166
OxygenO189
SulphurS16

FormulaC584H966N166O189S16
Total Number of Atoms:1921


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):9
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    6710
Absorption 0.1% (=1 g/l)    0.484,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.430,   assuming all CYS residues are reduced
Aromaticity:0.038

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.81, 25.56, 27.82]

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:87.3684
Grand average of hydropathicity (GRAVY):0.23