Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5857
Number of amino acids:129
Molecular Weight:14038.07 Da
Theoretical pI:9.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1310.08%
Cysteine CYS (C)32.33%
Glutamic Acid GLU (E)10.78%
Aspartic Acid ASP (D)64.65%
Glycine GLY (G)118.53%
Phynylalanine PHE (F)64.65%
Isoleucine ILE (I)53.88%
Histidine HIS (H)32.33%
Lysine LYS (K)96.98%
Methionine MET (M)43.1%
Leucine LEU (L)64.65%
Asparagine ASN (N)96.98%
Glutamine GLN (Q)32.33%
Proline PRO (P)53.88%
Serine SER (S)107.75%
Arginine ARG (R)53.88%
Threonine THR (T)96.98%
Tryptophan TRP (W)32.33%
Valine VAL (V)1310.08%
Tyrosine TYR (Y)53.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC626
HydrogenH970
NitrogenN174
OxygenO180
SulphurS7

FormulaC626H970N174O180S7
Total Number of Atoms:1957


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24075
Absorption 0.1% (=1 g/l)    1.715,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23950
Absorption 0.1% (=1 g/l)    1.706,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 8.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.46, 27.13, 18.60]

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:72.5581
Grand average of hydropathicity (GRAVY):-0.11