Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1227
Number of amino acids:226
Molecular Weight:24820.74 Da
Theoretical pI:6.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)104.42%
Cysteine CYS (C)167.08%
Glutamic Acid GLU (E)41.77%
Aspartic Acid ASP (D)125.31%
Glycine GLY (G)2511.06%
Phynylalanine PHE (F)156.64%
Isoleucine ILE (I)73.1%
Histidine HIS (H)20.88%
Lysine LYS (K)52.21%
Methionine MET (M)31.33%
Leucine LEU (L)104.42%
Asparagine ASN (N)156.64%
Glutamine GLN (Q)125.31%
Proline PRO (P)177.52%
Serine SER (S)146.19%
Arginine ARG (R)114.87%
Threonine THR (T)2410.62%
Tryptophan TRP (W)62.65%
Valine VAL (V)104.42%
Tyrosine TYR (Y)83.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1087
HydrogenH1615
NitrogenN301
OxygenO332
SulphurS19

FormulaC1087H1615N301O332S19
Total Number of Atoms:3354


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

Ext. coefficient    45920
Absorption 0.1% (=1 g/l)    1.850,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    1.810,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.78, 31.42, 11.95]

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:46.5929
Grand average of hydropathicity (GRAVY):-0.40