Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6032
Number of amino acids:63
Molecular Weight:6842.2 Da
Theoretical pI:8.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)46.35%
Cysteine CYS (C)69.52%
Glutamic Acid GLU (E)23.17%
Aspartic Acid ASP (D)00%
Glycine GLY (G)812.7%
Phynylalanine PHE (F)46.35%
Isoleucine ILE (I)69.52%
Histidine HIS (H)00%
Lysine LYS (K)23.17%
Methionine MET (M)34.76%
Leucine LEU (L)46.35%
Asparagine ASN (N)57.94%
Glutamine GLN (Q)23.17%
Proline PRO (P)46.35%
Serine SER (S)23.17%
Arginine ARG (R)46.35%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)57.94%
Tyrosine TYR (Y)23.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC302
HydrogenH482
NitrogenN84
OxygenO79
SulphurS9

FormulaC302H482N84O79S9
Total Number of Atoms:956


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):2
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)    0.490,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.436,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 30.16, 20.63]

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:91.2699
Grand average of hydropathicity (GRAVY):0.49