Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4216
Number of amino acids:210
Molecular Weight:22327.09 Da
Theoretical pI:5.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)125.71%
Cysteine CYS (C)199.05%
Glutamic Acid GLU (E)146.67%
Aspartic Acid ASP (D)52.38%
Glycine GLY (G)2210.48%
Phynylalanine PHE (F)104.76%
Isoleucine ILE (I)62.86%
Histidine HIS (H)20.95%
Lysine LYS (K)125.71%
Methionine MET (M)94.29%
Leucine LEU (L)2310.95%
Asparagine ASN (N)62.86%
Glutamine GLN (Q)41.9%
Proline PRO (P)125.71%
Serine SER (S)125.71%
Arginine ARG (R)41.9%
Threonine THR (T)2612.38%
Tryptophan TRP (W)31.43%
Valine VAL (V)94.29%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC966
HydrogenH1547
NitrogenN251
OxygenO297
SulphurS28

FormulaC966H1547N251O297S28
Total Number of Atoms:3089


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17625
Absorption 0.1% (=1 g/l)    0.789,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16500
Absorption 0.1% (=1 g/l)    0.739,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.29, 24.76, 27.62]

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:72.0001
Grand average of hydropathicity (GRAVY):0.17