Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6112
Number of amino acids:743
Molecular Weight:83015.06 Da
Theoretical pI:9.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)70.94%
Cysteine CYS (C)30.4%
Glutamic Acid GLU (E)111.48%
Aspartic Acid ASP (D)111.48%
Glycine GLY (G)20.27%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)30.4%
Histidine HIS (H)50.67%
Lysine LYS (K)577.67%
Methionine MET (M)30.4%
Leucine LEU (L)50.67%
Asparagine ASN (N)30.4%
Glutamine GLN (Q)00%
Proline PRO (P)28338.09%
Serine SER (S)13818.57%
Arginine ARG (R)00%
Threonine THR (T)91.21%
Tryptophan TRP (W)00%
Valine VAL (V)597.94%
Tyrosine TYR (Y)14419.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4036
HydrogenH5603
NitrogenN813
OxygenO1082
SulphurS6

FormulaC4036H5603N813O1082S6
Total Number of Atoms:11540


Total number of positively charged residues (ARG + LYS):57
Total number of negatively charged residues (ASP + GLU):22
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    214685
Absorption 0.1% (=1 g/l)    2.586,   assuming all pairs of CYS residues form cystines

Ext. coefficient    214560
Absorption 0.1% (=1 g/l)    2.585,   assuming all CYS residues are reduced
Aromaticity:0.194

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 132.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.40, 57.34, 3.50]

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:28.1696
Grand average of hydropathicity (GRAVY):-1.05