Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4389
Number of amino acids:453
Molecular Weight:47901.19 Da
Theoretical pI:5.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6414.13%
Cysteine CYS (C)40.88%
Glutamic Acid GLU (E)296.4%
Aspartic Acid ASP (D)357.73%
Glycine GLY (G)4710.38%
Phynylalanine PHE (F)91.99%
Isoleucine ILE (I)112.43%
Histidine HIS (H)61.32%
Lysine LYS (K)214.64%
Methionine MET (M)143.09%
Leucine LEU (L)4810.6%
Asparagine ASN (N)71.55%
Glutamine GLN (Q)163.53%
Proline PRO (P)255.52%
Serine SER (S)327.06%
Arginine ARG (R)367.95%
Threonine THR (T)163.53%
Tryptophan TRP (W)40.88%
Valine VAL (V)265.74%
Tyrosine TYR (Y)30.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2060
HydrogenH3361
NitrogenN621
OxygenO656
SulphurS18

FormulaC2060H3361N621O656S18
Total Number of Atoms:6716


Total number of positively charged residues (ARG + LYS):57
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    26720
Absorption 0.1% (=1 g/l)    0.558,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26470
Absorption 0.1% (=1 g/l)    0.553,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.93

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.30, 24.50, 34.22]

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:81.5672
Grand average of hydropathicity (GRAVY):-0.34