Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4264
Number of amino acids:830
Molecular Weight:91467.52 Da
Theoretical pI:5.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)394.7%
Cysteine CYS (C)101.2%
Glutamic Acid GLU (E)394.7%
Aspartic Acid ASP (D)465.54%
Glycine GLY (G)678.07%
Phynylalanine PHE (F)465.54%
Isoleucine ILE (I)435.18%
Histidine HIS (H)151.81%
Lysine LYS (K)435.18%
Methionine MET (M)232.77%
Leucine LEU (L)728.67%
Asparagine ASN (N)506.02%
Glutamine GLN (Q)253.01%
Proline PRO (P)344.1%
Serine SER (S)8910.72%
Arginine ARG (R)323.86%
Threonine THR (T)576.87%
Tryptophan TRP (W)80.96%
Valine VAL (V)647.71%
Tyrosine TYR (Y)283.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4069
HydrogenH6332
NitrogenN1082
OxygenO1250
SulphurS33

FormulaC4069H6332N1082O1250S33
Total Number of Atoms:12766


Total number of positively charged residues (ARG + LYS):75
Total number of negatively charged residues (ASP + GLU):85
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    86345
Absorption 0.1% (=1 g/l)    0.944,   assuming all pairs of CYS residues form cystines

Ext. coefficient    85720
Absorption 0.1% (=1 g/l)    0.937,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.45, 28.92, 20.84]

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:81.0964
Grand average of hydropathicity (GRAVY):-0.18