Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4829
Number of amino acids:786
Molecular Weight:87304.45 Da
Theoretical pI:6.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)394.96%
Cysteine CYS (C)303.82%
Glutamic Acid GLU (E)557%
Aspartic Acid ASP (D)455.73%
Glycine GLY (G)587.38%
Phynylalanine PHE (F)283.56%
Isoleucine ILE (I)546.87%
Histidine HIS (H)141.78%
Lysine LYS (K)506.36%
Methionine MET (M)172.16%
Leucine LEU (L)607.63%
Asparagine ASN (N)364.58%
Glutamine GLN (Q)222.8%
Proline PRO (P)263.31%
Serine SER (S)739.29%
Arginine ARG (R)425.34%
Threonine THR (T)465.85%
Tryptophan TRP (W)70.89%
Valine VAL (V)597.51%
Tyrosine TYR (Y)253.18%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3819
HydrogenH6079
NitrogenN1055
OxygenO1189
SulphurS47

FormulaC3819H6079N1055O1189S47
Total Number of Atoms:12189


Total number of positively charged residues (ARG + LYS):92
Total number of negatively charged residues (ASP + GLU):100
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77625
Absorption 0.1% (=1 g/l)    0.889,   assuming all pairs of CYS residues form cystines

Ext. coefficient    75750
Absorption 0.1% (=1 g/l)    0.868,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.14

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.64, 24.55, 21.76]

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:83.2952
Grand average of hydropathicity (GRAVY):-0.26