Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4797
Number of amino acids:114
Molecular Weight:11484.5 Da
Theoretical pI:8.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.65%
Cysteine CYS (C)108.77%
Glutamic Acid GLU (E)54.39%
Aspartic Acid ASP (D)32.63%
Glycine GLY (G)1614.04%
Phynylalanine PHE (F)32.63%
Isoleucine ILE (I)54.39%
Histidine HIS (H)10.88%
Lysine LYS (K)87.02%
Methionine MET (M)32.63%
Leucine LEU (L)97.89%
Asparagine ASN (N)21.75%
Glutamine GLN (Q)10.88%
Proline PRO (P)87.02%
Serine SER (S)87.02%
Arginine ARG (R)21.75%
Threonine THR (T)76.14%
Tryptophan TRP (W)00%
Valine VAL (V)108.77%
Tyrosine TYR (Y)21.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC497
HydrogenH813
NitrogenN133
OxygenO151
SulphurS13

FormulaC497H813N133O151S13
Total Number of Atoms:1607


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):8
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    3605
Absorption 0.1% (=1 g/l)    0.314,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.259,   assuming all CYS residues are reduced
Aromaticity:0.044

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.26

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.44, 29.82, 24.56]

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:82.9824
Grand average of hydropathicity (GRAVY):0.37