Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5682
Number of amino acids:320
Molecular Weight:35467.08 Da
Theoretical pI:8.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)134.06%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)144.38%
Isoleucine ILE (I)268.13%
Histidine HIS (H)20.63%
Lysine LYS (K)237.19%
Methionine MET (M)61.88%
Leucine LEU (L)288.75%
Asparagine ASN (N)185.63%
Glutamine GLN (Q)165%
Proline PRO (P)247.5%
Serine SER (S)206.25%
Arginine ARG (R)144.38%
Threonine THR (T)103.13%
Tryptophan TRP (W)10.31%
Valine VAL (V)309.38%
Tyrosine TYR (Y)123.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1608
HydrogenH2562
NitrogenN424
OxygenO461
SulphurS8

FormulaC1608H2562N424O461S8
Total Number of Atoms:5063


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23505
Absorption 0.1% (=1 g/l)    0.663,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.659,   assuming all CYS residues are reduced
Aromaticity:0.084

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.69, 27.50, 21.56]

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:98
Grand average of hydropathicity (GRAVY):-0.14