Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1102
Number of amino acids:133
Molecular Weight:14019.51 Da
Theoretical pI:7.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1511.28%
Cysteine CYS (C)129.02%
Glutamic Acid GLU (E)75.26%
Aspartic Acid ASP (D)43.01%
Glycine GLY (G)96.77%
Phynylalanine PHE (F)43.01%
Isoleucine ILE (I)64.51%
Histidine HIS (H)00%
Lysine LYS (K)86.02%
Methionine MET (M)53.76%
Leucine LEU (L)118.27%
Asparagine ASN (N)64.51%
Glutamine GLN (Q)32.26%
Proline PRO (P)64.51%
Serine SER (S)129.02%
Arginine ARG (R)43.01%
Threonine THR (T)43.01%
Tryptophan TRP (W)10.75%
Valine VAL (V)1410.53%
Tyrosine TYR (Y)21.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC605
HydrogenH989
NitrogenN163
OxygenO183
SulphurS17

FormulaC605H989N163O183S17
Total Number of Atoms:1957


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    9230
Absorption 0.1% (=1 g/l)    0.658,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.605,   assuming all CYS residues are reduced
Aromaticity:0.053

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.56

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 24.81, 28.57]

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:91.6541
Grand average of hydropathicity (GRAVY):0.43