Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4415
Number of amino acids:642
Molecular Weight:72029.21 Da
Theoretical pI:5.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)426.54%
Cysteine CYS (C)40.62%
Glutamic Acid GLU (E)304.67%
Aspartic Acid ASP (D)446.85%
Glycine GLY (G)467.17%
Phynylalanine PHE (F)274.21%
Isoleucine ILE (I)304.67%
Histidine HIS (H)142.18%
Lysine LYS (K)335.14%
Methionine MET (M)101.56%
Leucine LEU (L)599.19%
Asparagine ASN (N)335.14%
Glutamine GLN (Q)203.12%
Proline PRO (P)314.83%
Serine SER (S)558.57%
Arginine ARG (R)284.36%
Threonine THR (T)375.76%
Tryptophan TRP (W)182.8%
Valine VAL (V)517.94%
Tyrosine TYR (Y)304.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3256
HydrogenH4960
NitrogenN858
OxygenO966
SulphurS14

FormulaC3256H4960N858O966S14
Total Number of Atoms:10054


Total number of positively charged residues (ARG + LYS):61
Total number of negatively charged residues (ASP + GLU):74
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    143950
Absorption 0.1% (=1 g/l)    1.998,   assuming all pairs of CYS residues form cystines

Ext. coefficient    143700
Absorption 0.1% (=1 g/l)    1.995,   assuming all CYS residues are reduced
Aromaticity:0.117

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.49, 25.70, 21.96]

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:83.6449
Grand average of hydropathicity (GRAVY):-0.29