Physicochemical Properties of Peptide



PPepDB ID:PPepDB_966
Number of amino acids:255
Molecular Weight:26252.35 Da
Theoretical pI:4.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2610.2%
Cysteine CYS (C)176.67%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)135.1%
Glycine GLY (G)2610.2%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)62.35%
Histidine HIS (H)00%
Lysine LYS (K)72.75%
Methionine MET (M)31.18%
Leucine LEU (L)155.88%
Asparagine ASN (N)72.75%
Glutamine GLN (Q)83.14%
Proline PRO (P)166.27%
Serine SER (S)3112.16%
Arginine ARG (R)31.18%
Threonine THR (T)2710.59%
Tryptophan TRP (W)31.18%
Valine VAL (V)176.67%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1147
HydrogenH1741
NitrogenN289
OxygenO377
SulphurS20

FormulaC1147H1741N289O377S20
Total Number of Atoms:3574


Total number of positively charged residues (ARG + LYS):10
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    32400
Absorption 0.1% (=1 g/l)    1.234,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.196,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.49, 31.37, 19.61]

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:61.6471
Grand average of hydropathicity (GRAVY):0.14